TM 9-802 GMC DUKW-353

7/27/2019 TM 9-802 GMC DUKW-353

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7/27/2019 TM 9-802 GMC DUKW-353


ON,

P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

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a t h i t r u s t . o r g / a c c e s s_

u s e # p d - g o o g l e

7/27/2019 TM 9-802 GMC DUKW-353


1942

TON,6x6

onof

eYellowTruckandCoach

~T7YI\'. 502-

tions

32

Characteristics4-73-9

s...;8-2410-57

eandInspection28-4159-68

5

46-5376-79

4-5780-81

182-84

tructions

Maintenance62-6685-94

PartsandAccessories...68-6997

0-7998-109

0-87110-115

116-151

63

124164-174

Wiring125-129175-183

tartingMotor

191

nition140-150192-202

eneratorandControl151-159203-210

Lighting160-171211-221

Accessories172-174222-225

-257

-191258-262

08264-277

dParts,... .209-218278-297

uges219-221298-303

vingAxle222-228304-317

Drive229-240318-327

241-250328-337

51-259338-349

sionPower260-264350-352

vingAxle265-272353-360

-279361-367

aringsandTires280-290368-381

82-391

1392


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S

tofthemanual2

5,1942,isintendedto servetemporarily

farevisionnowin preparationwhichwill

nformationandguidancetothepersonnel

with theoperationandmaintenanceof

GEMENTOFTHEMANUAL

ininformationchieflyfortheguidance

ctionsXthroughXXXVIIIcontainin-

yfortheguidanceofpersonneldoing

dardNomenclatureLists,Technical

ationsforthematerialdescribedherein.


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NDCHARACTERISTICS

N(Figs.1and2)

manualis knownasTruck,Amphibi-

designedforamphibiousservice—opera-

iclehasautomotivecharacteristicsofa

ndinadditionisequippedwithan integral

nsuchamannerthat truckchassisand

and inbodyofhull.For landoperation,

wheelsdrivenbyconventionalsixcylinder

ughtransmission,transfercase,andpro-

eration,vehicleispropelledwitha water

ginethroughtransmissionandawater

atruck,frontwheelsare steeredwith

rassembly.Whenoperatinginwater,ve-

neduseof frontwheelsandarudderwhich

peratedbythesteeringgear column.

dbysixdriving wheels,"boat"shaped

uettecabandcargocompartment.Springs

hedtobottomof hullandsuspendin water

terpropellerandrudderaremountedin

lates.Vehicleserialnumberplate,

menclature,model,payload,etc.,asshown

icationplate,Fig.4,givestheTM

anualandpartslist tousewiththeseve-

ngineserialnumberplate, Fig.5,

eof enginelowerpartofcylinderblock

sshowninillustrations.

lttoacceptchassisframeandpower


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ON,6x6


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7/27/2019 TM 9-802 GMC DUKW-353


NDCHARACTERISTICS


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ON,6x6

ANTRUCK21/2TON6X6 \Q

MAINTAININGTRUCK

T

TRUCKMODEL

!

LBS.

LBS.

FACTURER

LINE70MIN

30

MFG.CO

mber(Nomenclature)

nddrivingaxlesareattachedto and

ame withboltsandattachingpartsade-

hull isdeckedforwardofopendriver's

arwheels,andalongboth sides.Acrash

hullatdeckheight.

scompartmentisopen typewithre-

penback.Compartmentisequippedwith

hside.Windshieldfoldseitherforward,

d.Compartmentisequippedwithdriver's

ntrancefromtherear oroverside.

atrearof cab,willaccommodatefor

tely25menandequipmentorapproxi-

TOTHISVEHICLE

-802

M9-1802

te


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NDCHARACTERISTICS

HMFG.CO.

mberPlate

.Hatchesinreardeckandfloor provide

holds,alsorudder operatingmechanism

hatchesinbowpermit accesstoengine,

compartment.

ission

meandaccessiblethroughmain

ylinder,valve-in-headtypewith269.5

t.Powerplantisremovablethroughhatch.

vespeedsforwardand onereverse

nd overdriveinfifth.Powertake-offfor

ountedonleftsideoftransmission.

sepermitsdriveofrearaxles,or front

uponpositionofmanualshift levers.Axles

tionalpropellershaftsanduniversal

ter-tighthousings.

rcase,mountedindriveline between

case,permitsengagementordisengage-

aterpropellerisdriven throughpropeller

Shaftingisequippedwith marinetype

terleakagewhereitpasses throughhull

ch,mountedatrear,is drivenby

off.Winchiscontrolledbyshiftleverin

h.Chocksandguidesforfront orrear

reprovidedonhull.

perminuteself-primingrotary

terpropellershaft,isconnectedthrough

tormanifoldtothefourlowestpartsof

ecentrifugalpump,alsopowerdrivenby

hargesfrommainpartofhull when

cityofrotarypump.50-gallonperminute

emergencyuse.


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ON,6x6

nsionalillustration.

372inches

—topup106inches

hes

6inches

ches

nches

es

44inches

ck—front23inches

ck—rear18inches

aming—frontandrear..28 inches

eels44inches

els49inches

aming.180cu.ft.

ar,82" wide,149"long.

inbows364cu.ft.

loorfront.

loorrear.

yDeserttype.

water13,000lbs.

d13,600lbs.

800lbs.

10qts.—Dry11qts.

ase1pt.

forwardrear—each)....13pts.

drear)10pts.


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NDCHARACTERISTICS

5

es)525Ibs.

meter(land)

meter(water)

ees

degrees

ngability60%

gability60%

utrefueling—5,000#load—

5m.p.h400miles

speed50m.p.h.

4m.p.h.

n Highfirst1.2secs.

.in Highsecond3.3secs.

h.inHigh fourth29.0secs.

750enginer.p.m.

0m.p.h.

.50m.p.h.

m.p.h.@

000#load,fullthrottle—smooth

ph

h!

e)4.2m.p.h.

ve)transmissionisnotused

peller.


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ON

ns8

terms10

1

gauges12

13

rationpreventivemaintenance....14

5

6

17

n...._ '18

on19

owing22

dwater24

TRUCTIONS

dinstructionsoutlinedinthis sec-

ssentialfactors ofdrivingthisvehicleon

k,but alsoincludeuniqueandimportant

fvehiclein amphibiousservice.Opera-

cleof thistyperequiresbasictrainingin

haknowledgeofwateroperationfunda-

thevehicleas a"land"truckre-

the fundamentalsofoperatingaconven-

,the drivermusttakeintoconsidera-

ofthis vehicle.Inaddition,drivershould

sticsofthevehicle suchaswidth,height,

hangs,visibilityandweight.

enceasadriver ofa6x 6truckis

rvicetraining;however,operatingper-

ithinstructionsapplicableto wateroper-

operatethevehiclein water.

Plates.Variouscautionand instruc-

river'scompartment.Theseplatesareillus-


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ON

KE^

DASH

OHELP

EVERENGINE

70*

TOKEEP

GHWATER

STRUCTIONPLATE

ROADSPEEDS\O

RPOSITIONSJ

ANGEIN

.MAX.ENGINESPEED/^

NPLATE

PELLER-DCPRESS\O

HEMPULLUPCONTROL^

NGILEAVINGWATER

MAX.WATERPERFORMANCE

HWATERPERFORMANCE

LE-i.4 M.P.H.-O.BM.P.CAL.

LE-5.4M.P.H.-1.4M.P.6AL.

.1M.P.H.-g.SM.P.GAL.

ROTTLE,ALLWHEELS,HI-RANGE

OPELLERWHENOUT

PINGBILGE-THENONLY

ECONDGEARy<L

UCTIONPLATE

ructionPlates


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TON,6x6

R

HICLE

WITH

RAS

OPERATIONS,ALSOj

ULLING,SNOW&ICE.J

E

SE

BLING

OCKS.

NDOPERATIONSJ

UND

ECTED

OVER.

DTRANSFERCASEINSTRUCTIONPLATE

VALVES

EVALVEATATIME

ARTMENT

OPENHOTAIR

MPEACHLINEDRV,

VES.

DDRAIN,ALSO

EINCENTRIFUGAL

D


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ON

sincludedinothersectionsofthis

hlystudiedbydriverand crew.These

to recognizeevengradualchangesinthe

ariousunits,andwillthusencouragecor-

ure.Knowledgeofvarioustroublesymp-

eswillenabledriverandcrewto apply

enoperatingundercriticalandadversecon-

UREANDTERMS

anamphibioustruckwhicharedif-

yencounteredona"land"truck.Inaddi-

ntheoperationof vehicleinwaterwhich

enoperatingvehicleasa truck.Wherever

mswhendescribingvariouscomponent

avoided.However,insomeinstances,

ppliedtoaboatmustnecessarilybeused,

ngwaterpropeller,bilges,rudder,etc.

etoFig.8.

owingtabledefinesvariousoperat-

reusedindescribingvehicleandits opera-

al.

nor rearofvehicle.

ngapparatus.

nerallyequippedwithtwohooks

anchororholdvehicle

nerallyplacedinholdofboatto

ofboatatits widestpart.

boatorvehicle.

boat.

directlyacrossatfrontorrear as

ngalongside.

lseparatingcompartments.

r cables.

generallyaroundopenings,topre-

oats.

esurfaceofthe watertothe

hicle,whenfloating.

guideforropeor cable.


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TON,6x6


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ON


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ctsideof vehiclewhencoming

le,ship,ordock.

gin thedeck,generallyhinged

ichaship issteered,therud-

belowfloor ordeck—space

thatpartwhichformsthe

atherortheside oppositeto

ows,theshelteredside.

vehicle.

hore.

okingfromstern(rear)

eopeningatrearof vehicleinwhichwater

ounted.

ticallynearvehicle'sstern.In-

ggearsothatwhenit is

medirection(water

etdowninto watertoforma

tinwater.Usedwhen

malmanner.

gonallyfromfrontor rearofone

nother,generallyused

clealongsideinwater,

sselor dock.

shiplookingfromstern(rear)

motionsufficientto makeavesselan-

e steeringofvehicle

atorvehicle.

scribing"V"typesupport

erinalignment.

preventleakageat ashaft—suchas

derpost.

rygearcaseorpowertake-offmounted

dwaterpropellershafting


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ON

ddisengagementofwater

esselinthewater.

(sometimesreferredtoasa"wheel"or

nderhull,is driven

ssiontopropelvehicle

water propeller,orthesteer-

SUPPLY

(Fig. 9),mountedonright-hand

eafter enginecompartmenthatchis

ofcrankcase,typeoflubricantr ecom-

ng,andflushingintervalsareoutlinedin

),mountedon right-handsideof

fterenginecompartmenthatchis raised.

sgraduatedshowingrelativeoillevelof

dbepulled out,lowerportionwipedoff

edto itslimit,thenpulledout againfor

crankcasewillbeindicatedongraduated

ck.Crankcaseoilshouldbekeptup tothe

erandDip Stick


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ON,6x6

performance,gasolinewithan

veshouldbeused.Instructionplateis

ver.Fuelwithanoctaneratingwith less

ecessitatesthereadjustmentofignition

e, engineperformancewillbeaffected.

ocatedatrearofvehicleonleft-hand

enishingfueltank,sameprecaution

ing fueltankonaconventionaltruck.

eproperly groundedtopreventstatic

akento prevententranceofdirtorwater

s beenspilledintocompartments

tsmustbethoroughlycleanedandall

ttemptingtostartengine.Asamatterof

artmenthatchshouldberaised andcompart-

dafterengineoperation.

renginecoolingsystemisfresh,clean

ddedinhibitors(rust preventives)and

mperaturebelow32°F.).Donotusesalt

ceptinextremeemergency— thendrain

ris available.

cessibleafterenginecompartment

scapis conventionalnotchtypeandcare

ovingitif engineishot.

mlackof water,donotaddcoldwater

ouldonlybefilledafterboilinghasceased

henaddwaterslowly,preferablywithen-

houldnotbe pouredintosystemwhen

ngeintemperaturemaydamagecylinder

CHES,ANDGAUGES

switches,andgaugesare,withfew

ntedoninstrumentpanel(Figs.10and11),

river.Locationandpurposeof thesecon-

eedingparagraphs.

isgaugeindicatestemperatureof

otquantityofwaterin system).Water

onoperatingconditions,load,etc.Normal

ngeshouldbebetween160°F.to185°F.

h212°F.(generallyboiling),engine

seofoverheatingdeterminedandcor-


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ON

artment

er

ates

per

t

olLevers

Lever

ever


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7/27/2019 TM 9-802 GMC DUKW-353


ON

witch

ton

chcontrolbuttonispushed com-

erviceandblackout,areturnedoff.Black-

cannotbe operatedwithswitchinthis

enswitchbuttonispulledto first

psandblackoutstopandtaillampsare

dinplacewithautomaticplungertype

sition.

hlockingbuttonatleftof switch

eforeswitchbuttoncanbe pulledtosecond

Whenswitchisin serviceposition,service

ndtaillamps,and instrumentpanellights

on.Whenswitchbuttonis pulled

oplightsmaybeoperatedfordaylight

witch.Blackoutdrivinglight

entpanel(marked"B.O.Drive"),ener-

twhichisinstalledadjacentto left-hand

vinglight,whichis ashieldedtype,isused

dblackoutheadlampswhenadditionalillu-


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ON,6x6

NLY)

tch

ngblackoutconditions.Blackoutdriving

elampuntil mainlightswitchisin first

aspreviouslyexplained.

ellightswitch,locatedoninstru-

el")isapush-pulltypeand energizes

ermainlightswitchis placedinsecond

ouslyexplained.

Enginestarterisoperatedby step-

sibletodriver'sright foot).Initialmove-

rterpinionwith flywheelteeth.Further

ctricalcircuitbetweenbatteryandstarter,

huscrankingengine.Whenenginestarts,

ompedalimmediately.CAUTION:Donot

is running.

ol.Vacuumwindshieldwiperis

dshield.Controlbuttonis providedfor

hownin Fig.10.Buttonispulledout to

ndpushedin toturnwiperoff.A hand

donright-handsectionofwindshield.

CONTROLS

olsarelocatedindriver'scompartment

poseofthesecontrolsaredescribedin

Actualoperationofeachcontrolundervari-

dinrespectiveoperationparagraphs.

essibletodriver'srightfoot)is used

eengine,dependingupondegreepedalis

enpedaliscompletelyreleased,engine

.Accelerationfromidlingto governed

epedalis presseddown.Corresponding

btainedbyreleasingpedal.


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ON

nright-handsideof enginejustabove

ecarbureterwhenvehiclehasbeenstand-

eorhasbeendrainedof fuel.

edal,accessibletodriver'sleftfoot,

lutch.Depressingclutchpedaldisengages

sothattransmissiongearsmaybe shifted.

r,accessibletodriver'srighthand,

earratiosorspeedsprovidedin transmis-

esfivespeedsforwardandonereverse.All

sedinconjunctionwithtransfercasewhen

ditiontotransmittingspeedand powerto

ropeller,transmissionalsotransmits

mpthrough interconnectedpowertake-off.

ransfercaseshiftleveris usedto

,neutral,or lowspeedsasrequiredto

mentofthisleverissuchthat lowrange

xle isinengagedposition.Transfercase

terpropeller.

Frontaxledeclutchingleverisused

rontaxledrive.This leverhasonlytwo

"out."Frontaxlemustbeengaged(lever

sfercasecanbe shiftedinto"low"posi-

enengaged,transfercasemaybe shifted

ge.

eelsareturnedor steeredbymeans

earassemblywhichisinterconnectedto

esandtierod withdraglink.

redduringwateroperationby means

ernjusttothe rearofwaterpropeller.

eelistransmittedthroughsteeringcolumn

withrudder.

Servicebrakepedal,accessibletoand

oot,controlsapplicationandreleaseof

edbrakeshoesateachwheel.Driverapplies

ebrakesas desired.Releaseofbrakesis

sfootpressureonpedal isreleased.

dbrakelever,locatedtorightof

pplicationofbrakebandassemblymounted

esystemoperatesdirectlyontransfer

ttingbrakingefforttowheelsthrough


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ON,6x6

keshouldnotbeused tobrakevehicle

on.Primarypurposeofthisbrakeis to

tionorto assistinbringingit toanemer-

pulledback,springloaded latchwilllock

n.

ke-offshiftingleverisusedwhen

h.Therearethreeoperatingpositions,

h,"withneutralpositionsbetween.Refer

winch.

ompressorisdrivenby chainfrom

riveshaft.Pumpisplacedinengagement

whichhastwooperatingpositions,"in"

disengagedbeforetirepumpshift lever

veris usedtoengageordisengage

ercaseconnectedtorear ofmaintrans-

engagedwhenleveris pulledupand

pusheddown.Clutchmustbedisengaged

erisplacedintoengagedor disengaged

eris determinedbyselectionoftrans-

operation,transmissionshouldbeplaced

forforwardoperationorinto reversefor

erpropellershouldbeengagedonlywhen

er.Useof propelleronland,exceptfor

ng,shouldalwaysbe avoided.

comprisestwomechanicallyoperated

ping tovariouscompartments,andmani-

hichpermitsindependentpumpingofvari-

pump.

edunderdriver'scompartment,is

opellerdrive shaftandoperateswhen

Thispumpprovidespositivesuctionfrom

orright rearcompartmentsasselected

providedto permitpumpingofthe

ythisbilgepump.Thecompartmentscan

atimedependingupontheselectionat

operationwhenleaksarenotapparent

emiddlecontrolvalveshouldbeopened,

staptto requiretheuseofbilge pump.


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ON

ltedPosition

cybilgepumpislocatedbelowthe

peratedby chaindrivefromthewaterpro-

pservicesthemain (middle)section

eneralrule willnotoperateuntilthe water

hiscompartment.

callyoperatedbilgepumps,ahand

vided.Thispumpis stowedonright-hand

.Windshieldcanbeplacedintwo

telylowered.Fig.13showswindshieldin

ngnuts,oneoneachside asshownin

nedbeforewindshieldcanbeplacedin

canthenbelockedwithnuts atdesired

oweredPosition


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ON,6x6

hieldincompletelyloweredposition.Ad-

asshown,mustbeloosenedtolowerwind-

eattachedtoforwarddeck.

xiliaryairintakeis openedorshut

hislocateddirectlyundercenterofwind-

eddownand forward,intakeisopened,per-

fairinto enginecompartment.Thisintake

cleis completelycoveredwithtarpaulin,

her,generallyreducingenginetempera-

eextinguisheris mountedina

eft-handsides torearofeachair outlet.

springtypeclampwhichmust beopened

eremoved.Extinguisherisoperatedby

enworkingupanddownlikea pump.Best

directingstreamofliquidatbaseof flame.

ofsurfcoamingatthe bowofve-

ashingoverbow,particularlyin rough

d.Surfcoamingcanberaised andlowered

inopenorclosedpositionby screwlocks

hcoversaresecureddowntocom-

elatches.Hatchesareequippedwithseals

ed,willpreventwaterfromenteringinto

EFOREOPERATIONPREVENTIVE

—VehicleExterior

ehiclefor evidenceofoilleakage

ngknucklehousings,pillowblock,and

kand tierodconnectionsandreport

nspectconditionoftires.

kelinesat allwheels.Seethateach

byits spring.

quipment(handtools,pioneertools,

kits,etc.)whichhavebeenassignedto

ingoodcondition,andproperlyattached

fastenings,etc.

rbladeandhose.


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N

Do notfilltankentirelyto topof

—VehicleInterior

oilleakagefromtransmission,power

ransfercase,andaxletransfercaseshould

permitsaccesstothese units.

—InEngineCompartment

iatorand replenishwateriflow.

echangedsinceprecedinginspection;if

diatorcoreand connections.

t itisin placeandproperlyadjusted.

ndconditionof oil.Iftherehas been

kfor leaksinoillines.If waterorother

oil,reportcondition.

onnectionsatcarbureter,fuelfilter,

exposedelectricalwiringandcon-

shouldbecleananddry.

tionofengineaccessories,including

cover,generator,starter,ignitionshield,

NLAND

tleverin"neutral."(All shiftlevers

ut"position.)

traightbackandlockinappliedposi-

uttonabout1/2".Thisisnot neces-

bouthalf-wayif engineiscold.In

hokebuttonmaybeheldcompletelyout.

"on"position.

todisengageclutchand holddown

.Releaseleverwhenenginestarts.

hrottleandchokeadjustmentsto

peed.

or.Thestartingmotorshouldnot

gerthan10 to15seconds.Afterstarter

tresults,aperiodof 10to15 secondsshould

ragain.

enginewillnot startafterreason-

nuetousestarting motoruntilreasonfor

orrected.


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ON,6x6

fstarterfailstocrankor cranks

wntobe ingoodcondition,reportstarting

hority,thenuse handcrankingmethod.

nggearismountedonpropeller

pellertransfercase.Handcrankenginein

stspeed.

erinneutral position.

r.

makesure propellerisclear.

ingbarincogof crankinggear.Stand-

ofvehicle,pullsharplyoncrankingbar

r twotimesbeforeturningignitionswitch

bouti/2".

riverisattendingvehicle)chokebut-

kehasbeenusedduringrepeatedefforts

notbenecessarytousechokewhenhand

Pull sharplyoncrankingbar.

rankingbarto startengine.

mediatelysteponclutch,disengage

etransmissioninneutral.Donot runwater

me unlessvehicleisinwater.

rtinfiveor sixcrankings,reference

e-Shooting"tableinSectionXXIV,"En-

ofenginefailure.

maybe startedbytowingvehiclein

canbestartedbytowingwithvehicleonly

dbeofsufficientlengthto permit

ehicles.

ncethrottleaboutyz".Pullchokeout

used.

urth(fifthif tractionisdifficult).

igh."

beengaged.

h.

e first100feet,disengageclutch.

eedreachesapproximately10m.p.h.,

ediatelyafterenginestarts.

Startingengineincold weather

providingvariouscoldweatherprepara-

ferenceshouldbemadetoSectionVI,


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ON

ubricantsrecommendedforusein cold

nandroutinemaintenanceoperationsitem-

ngSystem,"andSectionXIX,"Starting

dbefollowed.

tarted,engineshould bepermitted

rm-up"periodwheneverconditionspermit.

desthedriveranopportunityto observe

fenginebeforethevehicleisplacedunder

smoothly,listenforanyunusual

ttering,etc.Reportanyunusualnoisesim-

rity.

oolingtemperatureshouldslowly

atureofapproximately165°F.isreached.

allottedduring whichtemperatureshould

erictemperature,lengthoftimeenginehas

thisperiodof"warm-up."However,iftem-

venormalupto boiling(212°F.),engine

pped,overheatingcausedeterminedand

enenginefirst starts,consistency

seinthe oilpressurereadingongauge.

essureshould recedeslowlytonormal.

yfluctuateasenginespeedincreasesorde-

erraticfluctuationofoil pressureindicates

mmediatelystopped,andconditionin-

augedoesnotindicatequantityofoil in

ninstrumentpanelindicatescharg-

ystem.Ammetermayormaynotshow

gwhenengineis firststarted.Asa

showchargeasenginespeedis increased,

tartingmotorhasdrainedbattery.Am-

essivedischargeduringwarm-upperiod.

LAND

and operationaregroupedindriver's

cationsandpurposeshavebeenexplained

aragraphsbrieflyoutlinefundamentalrequi-

nofvehicleonland.

mplishprocedureoutlinedinPara33.

AxleShiftCombinations

byrear axlesonly,orbyfrontand

otbedrivenindependently.


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Transfercasemaybe operatedin

edeclutchinglevermustbein "OUT"

nnotbeoperatedin"low"("L"onshift

sare driving.

ving.Front axledeclutchinglever

ansfercase cannotbeplacedinto"low"

eris placedinto"IN"position.Afterfront

ansfercasecanbeoperatedin either"high"

usingtransmissiontooperate

rontandrear axlesmaybedrivenatsame

ersinpositions aspreviouslyexplained.

omLowtoHighSpeeds

ositionforaxledrive,transmission

beaccomplishedinsuccessivestagesas

ndreleaseacceleratorpedal.

tleverfromneutralinto firstspeed

eonclutchpedalandat sametime

orpedal.

ade,accelerateengineuntilroad

oximatelythatindicatedonplate(Fig.7).

mumroadspeedsatvarioustransmission

peratedin"low"and "high".

peedhasbeenobtainedin firstspeed,

,depressclutchpedal,andplacetransmis-

ition.

dacceleratetoproperroadspeed,

hrough(e)for third,fourthandfifth

es.

direct"andisgenerallyusedfornor-

eroads.Fifthspeedis "over-drive"andis

aximum"no-load"speedongoodroads.

omHightoLowSpeeds

waysbeshiftedintonext lowerspeed

or,or vehiclespeedismateriallydecreased.

g"isgenerallyapparentwhenascending

orepowerisneededtopull onroughterrain,

ecautionarymeasure,thesameratioused

e usedwhendescending."Double-clutch"

forshiftfromhigh tolowertransmission


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ndreleaseacceleratorpedalatsame

tleverinto"neutral"("N").

ndaccelerateenginemomentarilyto

gainandmovetransmissionshift

.Donot useforceonlever,"feel"itinto

ndaccelerateenginetodesiredspeed.

iftedsuccessivelyintoallnext

ner.

hift

ought toadeadstopbefore trans-

reversepositionin followingmanner:

todisengageclutch.

aspossibletothe right,thentoward

on.

ndaccelerateenginetodesiredroad

n off-the-roadoperations,onsteep

ng.Frontaxle shouldnotbeengaged

eroadsundernormalconditions.

edor disengagedatanyvehicle

edonlywhentransfercaseis inneutral

chisnotnecessary;however,thisusetends

er.Considerablepressuremaybeneces-

edeclutchinglever;however,thiscondi-

rouble.

ghtoLow

adewhilevehicleisstillon hardground

sencountered.Frontaxlemustbe en-

ecanbeoperatedin"low"range.

hingleverinto"IN"position.

ndmovetransfercaseshift leverinto

ndaccelerateengine(approximately

ed).

gainandmovetransfercaseshift

sition.Donotuse excessivepressure.

elerateenginetodesiredspeed.

wtoHigh

omplishedregardlessofvehiclespeed.


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ndmoveshiftlever intoneutral("N")

ndaccelerateenginetosynchronize

gain,thenmovetransfercaseshift

n.Accelerateenginetodesiredspeed.

memannerasemployedwhendriving

udderlinkageispermanentlylinkedto

wever,rudderactiondoesnotinterfere

siderationmustbetakenof vehicle'swidth

enmakingaturn.Referto Para.7for

ations.

aysshiftintolowertransmission

nstolabor.This canbeaccomplishedmost

estillhassufficientmomentumtopermit

ngingvehicletoastop.Front axleshould

psteepgrades.

waysshiftintolowertransmission

neto actasabraketo assistincontrolling

mitthevehicleto exceedmaximumroad

iving downgrades.Excessiveengine

uchconditionsareharmfultoengine.

gtoalowergear atanyrateof

thatenginespeedissynchronizedwith

hisengaged.Ifclutchisengagedat time

erthanrelativeroadspeed,driveline parts

rain

xleinoff-the-roadoperation,onsteep

llingin sand,mudorclay.

mp"vehicleoutofdeepsand,mudor

to"dig."Whenvehicleprogressstops,

enreverseslowlyforseveralfeetoruntil

.Goforwardslowlyagain anddeclutch

lsstartdigging.Itmaybenecessaryto

eraltimestomakea track,ifpossible,in

esscannotbemadebyusingthis procedure,

sist vehicleoutofthemudor sandbefore

perateinsoft sand,reducepressure

5Ibs. Tiresshouldbereinflatedtorecom-

perationonsolidground.


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NLAND

d

edal.

owlyandevenlyuntil vehicleis

applyevenpressure.Thiswillpermit

ngspeed.

ormalstop,releaseacceleratorpedal,

byevenpressureonbrakepedal.

ndmovetransmissionshiftleveri nto

akepedalto bringvehicletoslow

k vehicle.

tleverinto neutralposition.Place

erinto"out"position.

alstop(Para.17b.).

tlinedinPara.34.

ERATION

PreventiveMaintenance

ed,andshould beperformedinaddi-

der"Pre-startingandBeforeOperation"

nd

andseethat itissecurelymounted

tersuchasweeds,dirt, etc.,from

ellerrear shaftinginrear"out-

xcessivelyloose.

ershaftrear"out-board"bearing,

Lubrication."

t.Ruddershouldbe 3degreesto

raight ahead.Reportloosenessofrudder

ngboltsatallpoints ofattachment

panelsforpossibledamageduring

haveresultedinpenetrationofpanels.

oughexaminationof"bellows"


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propellershafthousingsundervehicle.See

elytightened.Reporttheslightestevidence

lows.Ifthesepartsare damagedorinany

wvehicletoenterwateruntil newpartsare

alled.

eson axlesandpillowblock.Re-

nbottomandsidesof hull.Seethat

ghtenedinplace.

d

ndthoroughlyventilateinteriorof

nt.

ments.Noteandreportpresenceof

ybe anindicationofleakagefromthe

psand operationofcontrolvalves.

ompartmentshouldbethoroughlypumped

leaves,paper,sand,dirt,twigs,orother

umpdrive beltforpropertension.

dtensionof drivingchainatcen-

pmentthathavebeenassignedto

ingoodcondition,andsecurelyattached.

herflapvalveandplungerin the

onditionofemergencybuckets.

ndsealsand seethathatchesare

d.

ticipated,cargocovershouldbe

desandcargosecuredin place.

ble,pulleysandlinkage.Reportex-

enterswater

pectwaterpropellershaft,stuffing

se showanyindicationofexcessiveleak-

tightened.Donotsetglandnuts extremely

erheatingofstuffingbox.Aslightseepage

oxmaybeconsiderednormal.

forwaterleaks.Specialattention

ams,especiallypropellertunnel.

atorytoenteringwater,embracesall

as.15a.throughf.

dwhilevehicleis afloat,instructions

ouldbeused,withtheexceptionofPara.


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ginecannotbestartedbytowingvehicle

agoodpracticetotestoperationof

ngwater.Thisis notnecessary,however,

ittent.Iftime permits,makefollowing

fullofwater intoeachcompartment.

enoughtocoversuctionendofbilge pipes.

equiremore.Vehicleshouldbeplacedso

hanfront.

fercaseshiftlever isinneutralposi-

lacewaterpropellershiftleverin

thenplacetransmissiondirectlyinto

ndaccelerateenginetoaboutyzfull

ntrolvalveata timeuntilthatparticular

Onlyonevalveshouldbeopenedat a

gefromoutletonleftside ofhullnear

elerateengine,depressclutchpedal,

verintoneutral,thendisengagewater

tingwaterpropelleronland,make

rsternofvehicleasa safetyprecaution.

dedand willinflictseriousinjuryupon

aterpropelleronlandfor anylengthof

OPERATION

lewillenterwaterfromland.This

axles.Otherconditionsmaynecessitate

fromship's sidewhichmaynotrequire

s

equipmentmustbethoroughlyse-

er.Auxiliaryairintakeshouldbeclosed.

ofentrytodeterminetransmission

ringwater.If softsandispresentat

expectedatanyfuturelandingpoint,all

approximately15Ibs.

ughlywarmedup,and oil,gasand

replenished,ifnecessary.

gh sea,orheavyloadis anticipated,

of vehicle.


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dualslope intowater.Ifnecessaryto

ucky,orrockyterrain,takeintoconsidera-

handdepartureanglesandgroundclear-

vehicleenterswithonly wheels

hingleverintoengagedposition,

osecondspeed,andtransfercaseshift

whengoingintowaterand continue

cleis afloat.

cleisafloat,accomplishfollowing

l hardtostopwheelsfromrotating.

tleverdirectlyintosecondforward

hiftleverinto engagedposition

daccelerateenginerapidlyatthe

d.

owaterandthere seemstobe

ng wheels,steponclutchmomentarily

ftleverinto neutralposition.Itisnot

ontaxle,asfrontaxledrive willbeneeded

a)through(g) shouldbeaccom-

asquicklyaspossible.Donotforceany of

withextremepressurebutrather"feel"

engaged,bestoperationisfull

nsecondforwardspeed.

ysurf,strongcurrent,orwhenmaxi-

erpropellermaybe operated,aswellas

ehicleenterswater,asfollows:

sbeforeattemptingtomakewater

ndplacewaterpropellerinto en-

onintosecondspeed,frontaxledeclutch-

,andtransfercaseintohigh.

Or Pier

gfroma shipforentrytowater,make


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medupand operatingasvehicleisplaceu

asbeenlaunchedandmooringlinescast

beimmediatelyengagedwithtransmis-

hip'ssideorpier,push frontofve-

rningfrontawaysharply.If sharpturn

made,backofvehiclewilltendto swerve

usepossibledamage.Ifpossiblewhenleav-

ier,push vehiclewelloutintowaterbefore

mpers)attheside ofvehiclewhen

er.

R

beestablishedforoperatingor

ariousconditionsrequiredifferentopera-

ghknowledgeofsteeringinwater,water

dbilgepumpsystem,togetherwithknowl-

yexpedients,isessential.Recommendations

cceedingsub-paragraphshavebeencom-

ce.Theseinstructionsshouldbethoroughly

heinstructionsincludeonlyoperationun-

eferenceshouldbemadetoPara.23,"Emer-

yout-of-the-ordinaryconditionswhichmay

ichit issteeredinwateris mounted

operatedorturnedbycablesattachedto

rcolumn.Asrudderisattachednearstern,

obtainedbyforcingsternthe opposite

turn.Driver,however,turnssteering

tomotivemanner.

smoreturningof steeringwheel

noperatingon land.Whilerudderresponds

ngwheel,thevehicle'sresponseis notas

nd.It isthereforenecessarytoanticipate

nwater.This isparticularlynecessary

ter.

courseinroughwater,drivermust

of wavesbyturningsteeringwheelahead

ingorswervingfromthedesiredcourse

eisallowedto startswerving,itwilltake

gitbackto itscourse.

erextremelyadverseseaconditions,

ucetroublefromwaves.Whenlandingbe-


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lutelysquareinfront ofwavesandreduce

achesstern.

thantopspeed,bearinmind that

uldbemaintainedtoprovidesteerageway.

edofvehicleto pointwhererudderwill

nalshortspurtsofengineshouldbe madeto

struddertoprovidedesiredsteering.When

hwater,makeallspeedpossiblebetween

drivingwheelstouchbottom.

an objectinwater,rememberthat

ervetowardan objectwhenvehicleis

erunderaverageconditions,requires

niqueasusedwhenreversing"land"vehicle.

windsandrough water,however,reverse

Themostsatisfactoryreversesteering

sternin desireddirectionwhilestilldriv-

of vehicleturningandaspropelleris

rnwill generallybemaintained.

sindriving position(highrange)as

npowerand steeringofvehicleinreverse.

propellercanbeengagedin second

peed—fullthrottle,orthirdspeed—M

onwaterisattainedin secondspeed—full

lerinstructionplate—Fig.6).Whenthird

throttleorY$ throttle,speedonwateris

leageisincreasedasitemizedoninstruction

^throttleis obtainedinfollowingmanner:

ellerandengagerearwheelshigh range.

dometerregisters12 m.p.h.(rearwheels

yinwater).

iningin positionfor12m.p.h.,rear

disengagerearwheels(transfercaseinto

erpropellerandoperateatsamethrottle

gWaterPropeller.Ifnecessaryto

erpropellerwhileoperatinginwater,fol-

beaccomplished:

nddecelerateengine.

pellershift levertodisengageor

aseclutch.

eto makeaquickstopwithvehicle

vehiclebrakeshavenoeffectwhen

ristheonlymethodofstoppingin water.

einwater,waterpropelleranddriving

dbereversed.Drivermustforeseea stop


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singis necessary.Whensuchconditions

cleinfollowingmanner:

nddecelerateengine.

xledeclutchingleverisinto"IN"

ercaseinto"high"range.

dalin depressedposition,placetrans-

ndaccelerateenginetofullthrottle

heckedtopoint ofcontrol,reduce

neuverproperly.

m.,"BilgePumpControl,"theme-

stemconsistsoftwobilgepumpsoperated

g.Thesepumpsoperateonlywhenwater

tion.

ouscompartmentsinhulldepends

ffvalves,it isimportantthatattentionbe

gofall compartmentswhileoperatingin

vesmustbeclosedexcepttheonewhich-

bepumped.Itisa practicalplantoalternate

minutesduringoperationincalmwaterto

mpartmentsofanywaterwhichmayseep

Underaverageoperatingconditions,the

ofcentercompartmentshouldbeleftopen

hwater,note wherevehicleis"ship-

gepumpcontrolvalvesaccordingly.Ref-

Para.23,"EmergencyExpedients"for

mergencyconditions.

ER

mberwhenlanding,isthatalldriving

gbeforelandis approached.Agradualslope

ted,ifpossible.Alsoavoid,if possible,

,orthickweedpatches.Weedsmaytend

r.

conditionsmustbe takenintocon-

ingland.Undernormalconditionswhere

ghwaterarenot present,approachshould

er:

d,thedrivingwheelsshouldbe en-

ancebeforereachingshallowwater.(This

henapproachinglandinroughwater.)

ngagementbydepressingclutch,placing

erinto"in"position,andplacingtransfer

y"low")range.

throttle withpropellerandwheels

Afterwheelsaregroundedandvehicleis


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opellermustbe disengaged,andtransmis-

lever placedintosuitabledrivingposi-

nt.Iflandingmustbe madeina

approachwellabovepointofdeparture.

pproximatelya45 degreeangle.After

ofvehiclewilltend toswingdownwiththe

itmaybenecessarytocomein atacloser

erlanding,bilges shouldbecom-

ainedinPara.18c.,"TestingBilgePumps."

side vehicleaddsconsiderablytoweight

beforeoperatingon roughterrain.Also,

ccomplishtheoperationsitemizedinSec-

nanceandInspection"pertainingto

GANDTOWING

compartment,isusedwithintercon-

erlinesto holdvehicletobottom.When

pointsofanchor,fastentobottom,thus

.

ackleto winchcablehook.Remove

astenshackleintochainring.Installbolt

eanchormustbefastenedsecurelytoline

overboard.

ynecessaryunderemergencycon-

dcableshould beconnectedtoanchor,as

esafest anchoring.

ditions,anybulky,heavyobjectcan

hassparetireandwheel,etc.

chorinextremelydeepwater,addi-

etdown intothewater.Thetarpaulin,

okeepitunder water,canbeused.This

ducedrifting.

oughweather,avoidmooringalong-

ever,ifnecessaryto moor,longmooring

ducestrain.Boworfrontofvehicleshould

ndis strongerthancurrent,inwhichcase

illustrates methodofmooringvehicle

eastlinesatfrontand rear,andspringlines

icletodockasshown.Theselinesshould

gagainstdock.Itis necessary,however,to


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oringVehicle

eandfallof tidewhenmooring.Lineshould

dasnecessarytomeetconditions.

whicharecommonlyusedwhen

hicleatsternand towedvehiclealongside

Alwaysdroptowbeforeattemptingto

eoutofwater[see(4) (c)].

Fortowingpurposesinthewater,

ithatowhook anchorshackleatthefront

eguide),pintlehookat rear(justbelow

sonright andleftside.

(Fig.16). Towcableshouldbeat-

tlehookontowingvehicleor directfrom

kanchorshackleontowedvehicle.Tow

ately100feetlongtopermit maneuver-

enoperatinginrough water,thelongest

used. Whenapproachingbank,towedve-

osetotowingunit.Slacktowcablesothat

andingwithoutaddedload,thenlandother

owedvehicledirectlybehindfrontvehicle.

ingatStern


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ingAlongside

de(Fig.17).Insmoothwater,when

gisnecessary,itisadvisabletotowanother

efenders(bumpers)shouldbeusedbe-

wounits shouldbemooredtogetheras

howsuseof"breast"and"spring"

uveringalongside.Breastlinesatfront

moutsidelifting eyeofoneunitto theout-

it.Springlinesshouldextendfrominside,

ttotheinside rearliftingeyeofanother.

otbetooclosetogether.Distance

uldvarybetween11/2fgetto 4feet.The

dif anywavesmightbeencountered.The

ximatelyonefootfartherapartthan the

terwill tendtokeepunitssafelyapart.

blesshouldbethoroughlywrapped

theypass throughcableguide,anchor

sorwhererubbingoccurs.Extremecare

lines frombecomingentangledinwater

NTS

chrequireemergencymeasuresmay

perations.Theseconditions,togetherwith

temizedinsucceedingparagraphsand

edbyoperatingcrew.Thecrewshould

ncyexpedientsshouldbeappliedas simul-

erthanattemptingtoaccomplishthem


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cies,everyknownexpedientshouldbeac-

steeringcablebreaksorrudderjams,

dder,oneofthreemethodsofemergency

e,stopwaterpropeller,openstern

secureruddertillersothatrudderis in

terrudderissecured,placeall wheelsinto

,waterpropellershaftleverin"in" posi-

econdspeed.Operateatfull throttleand

ithfrontwheels.Steeringwithwheels

swithrudder.

erwheelsinstraight-aheadposition

ofcrewsteervehiclewithtiller instern

ndwedgedatanangle,makingitim-

ddershaftmust bedisconnectedinstern

droppedthroughbottomofvehicle.Re-

edin SectionXXXIII,"SteeringSystem,"

sbeenremovedandhole plugged,vehicle

heels.Allwheelshigh rangeandwater

waterpropelleris renderedinopera-

emadebyusing allwheelsin"high"transfer

missionspeedfullthrottle.Water propel-

Underextremelyfavorableconditions,

ly2m.p.h.

s andvehicleisnearshore,shovels

oards,etc.willmakeusefulpaddles.If

stoff-shorewindorcurrent,anchorve-

es.

gepumpswillservicebilgesunder all

yreasonwaterpropellercannotbe op-

ncannotbereducedwithmechanicalbilge

gepumpand,if necessary,buckets,helmets,

bleforbailing. Toprimehandpump,hold

llbe forcedupthroughbottom.

chanicalbilgepumpswithoutwater

odamagedpropellerorif servingasasta-

ectwaterpropellershaftingtorearof

terlineshouldbepluggedwith wooden


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g fromoutsideandpullin throughhole.

terlinemayalsobe pluggedwith

.Wherepossible,startplugs orrags

eofhull.Pressureof waterwillassistin

netrationis justbelowwaterline,shifting

d maybringholeabovewaterline.

hweatherin water,actionofvehicle

le.Varioushintsinthesucceedingsub-

iedandappliedwhennecessaryascondi-

ughwater,steeringinreversewill be

g,sterncanbebestcontrolledbygiving

dspurtstoforcethesterninthe desired

etelycoveredwithcargotarpaulinand

enginemustreceiveitsair throughauxil-

roughwater,thiscan beopenedonly

tranceflapshouldbekeptopenontheside

cessarytogothroughheavysurf,all

a fewminutes,butshouldbeopenedas

gine.

aheavysurf, itisparticularlyim-

sof cargocoverbeabsolutelytight.

oroughlysecuredbeforeoperationin

from ahead,shiftmovableweights

owabovewaves,andto reducetendency

LANDANDWATER

eration,conditionsunderwhichwinch

methodsare importantwhenoperating

service.Winch,rearmounted,isusedto

tsundermany variedconditions.Ref-

etoSectionXXXVIII,"Winch"forme-

tructionsonwinchmechanism.

Winchisdrivenbypowertake-offat

ngagementforpullingor hoistingis

ftleverlocatedincab(Fig.10).This lever

ons;low,reverse,andhighwithneutral

elockingplate,attachedtofloorboard

tivemeansoflockingleverintoneutral

eandlow).Thisarrangementwillprevent


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wClutchLeverandDrumflangeLock

powertake-off.Anautomaticsafetybrake

oad whileleverisbeingshiftedinto

s.

ngjawclutchat winchmechanism.

anddisengagewinchdrum.Whensliding

intodisengagedposition,winchcablecan

dingjawclutchmustbeengagedtopermit

ower.

rumflangelock(Fig. 18)ismount-

eWoundEvenlyonDrum


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front,6to70Feef

Front,100fo120Feef

front,200fo250Feef


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nchingfromFront

ndlemechanism.Thislock,whichisspring

veralholesinthe winchdrumwhensliding

sition.This mechanismpreventscable

mwhilevehicleisunderway.Flangelock

anddisengagedfromthedrumbefore

gagedwithdrum.Disengagedposition

wnin Fig.18.

nchingfromRear


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chAroundTreewithCableasusedin

g jawclutchleverintorelasedposi-

rumflangelockhandle.Pulloffenough

roundTreewithChainasusedin


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withSnatchBlockandChainas usedin

slidingjawclutchleverintoen-

ngineclutchpedal,shiftpowertake-offlever

eavy,orhighpositionto takeslackor

en releaseengineclutchpedal.

ewith SnatchBlockasusedin


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asusedinFigure25

eclutchpedaland shifttake-offlever

ress engineclutchpedalandshift

everse.

susedI nFigure24


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asusedInFigure23

asusedInFigure27


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asusedinFigure22

asusedinFigure2 1


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TON,6x6

asusedinFigure20

ertake-offlevermustbeinneutral

temustbein placetopreventleverbeing

ally.Winchslidingjawclutchshouldbein

rumflangelockinengagedposition

ullingspeedsarebased onmaximum

m.whichshouldnotbe exceededwhenusing

sterthanthisenginespeedwillresult in

bablefailureofparts.

Shift.

gspeeds(lowandhigh)are obtained

shiftlevertoengagepropergearing.Use

dlinglight loadsorlowerspeedposition

eenginewhen winching,especiallywhen

dorwhenwindingincablewith noload.

hingthisvehicle,alwaysassist

ebecomestight,usingtransmissionin

ls)andtransfer caseauxiliaryrange

edShift.Twomethodsmaybeused

le.


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asusedinFigure26


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ding jawclutchintodisengaged

ockleverraisedup inlockeddisengaged

pendsupontheamountof pullappliedto

angewill automaticallykeepdrumfrom

ingtoorapidly.Careshouldbe takennot

a load.Shiftpowertake-offlever

atespeedby acceleratingengine.

oundondrumwithoutsomeloadon

ble,cableshouldbeproperlyattachedtoan

epulled forwardbywinch.(Slidingjaw

rtake-offleverintolow.)Averylight

byoperatorwhilewindingcablewill in-

.

stlayerof cableismostimportant.

againsteachothertopreventcoilson

ownbetweenthem.Cableshouldbewound

toobtain thisresult.Afterfirstlayeris

arytoseethat eachadditionallayerstarts

y.

onditions.Severalexamplesof

sconditionsareillustratedinFigs. 20

onsdonotpresent allconditionsunder

however,theyarebasedonactualexperi-

llustrated.Methodsofattachmentsof

pointsareillustratedinFigs. 28through

wnecessarysnatchblockandcable

ethodsshouldbeusedunder theconditions

ndPrecautions

th winch.Ifavehicleisassisting

drivingwheelsshouldbeutilized.Al-

ngtheinstantwinchcablestartsto take

notstartdrivingwheelsif thereisslack

ngwheelsareusedto assistwinchopera-

chisin low(pulling),transmissionin

ransfer caseinlowrange.

danchoris illustratedinFig.40.

menthasbeenmadetoanchorshackle,

guidedinto sandorgroundasshown,

akesup slackanddrivesflukesorpoints

r isoperatingalone,anchorpointscanbe

oredriverstarts tooperatewinch.Ifsand


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chor,Maybeusedin MannerShownin

n bethrownoutandwilldig intoground,

oadisput onwinchcable.

hwillbemorepowerfulwithallthe

eit startstooperate.Undermanycondi-

However,thebestproceduretouseisto

mthe winchdrumaspossiblebeforestart-

lpermitwinchcabletobe pulled

henwinchingfromthefront.However,

ar,thisstraightpull cannotbeobtained

tis necessarytopullatanangle fromthe

e guidedevenlyontothedrumas the


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7/27/2019 TM 9-802 GMC DUKW-353


eonthe hullforthemountingof stand-

ndmachinegun.

alledonvehicle,machinegunis

edtorightof driver.

TS

tsareprovidedat rightfrontcorner,

errearof driver'scompartment.These

amptypeandhold thelegsofmount

"U"boltsaretightened.


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CEANDINSPECTION

andinspectionterms29

eintoservice30

erationinspectionand

31

spection32

on33

ration35

ation36

eventivemaintenance37

eventivemaintenance38

ndpreventivemaintenance39

echanges40

vemaintenanceproceduresandopera-

onprovideanopportunityforcrewand

personneltoreplenishessentialoperating

ible,visualormanualinspectionimproper

nitsandsystems,andtomakeminorad-

towearduring normaloperation.Itsout-

natethe elementofneglectwhichistoo

en,unexpectedfailureofvehicleoperation.

NANCEANDINSPECTIONTERMS

whendescribinginspectionandpre-

rations.UsingArmsmaintenancepersonnel

veswiththeseterms.

DVEHICLEINTOSERVICE

sbeingplacedinto service,accom-

perationsincludedinParas.31and32.

EFOREOPERATIONINSPECTION

ENANCE

ngand beforeoperationinspection

nceprocedureistobesurethatcondition

gedsincethe after-operationinspections

eseproceduresareofaroutinenature,the

rin mindthatsuchinspectionsareim-

vehicleperformanceandcrewsafetydur-


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ON,6x6

oroughlyfamiliarwithrecommendedpro-

ughtheseinspectionsalmostautomatically

esizeupgeneralconditionofvehicle.

reoperationpreventivemaintenance

restto driver,theseproceduresarelisted

ntrolsand Operation."

RATIONINSPECTION

onpreventivemaintenanceprocedures

er,theseproceduresarelistedinPara.

dOperation."

OPERATION

nce,itistheattentionto littlethings

alnoisesorodorsand slightirregularities

akingnecessarystepstocorrectanydefects

epreventiveprocedure.Whilevehicleisin

nsfor anysoundswhichmaybeasign of

chesfortheodorof anoverheatedgen-

s,boilinganti-freeze,fuelvaporfromaleaky

gns oftrouble.Everytimeheusesbrakes,

eds,orturns,heconsidersit atestand

orunusualperformance.Onlyunderemer-

evehiclebeoperatedafterindicationsof

ed.

Operationlistenfor suchnoisesasthe

dicatethetroublespecified.

neratororwaterpumptrouble.

rtdrivercandomuchto avoidserious

stigatingandreportingthefirst signsof

sduringacceleration.

eofsteamduetooverheating.

sesunderfloorboards—Transmission,

rcasetrouble.

tioninandbeneathvehicle—Loose

bentpropellershaftorwornuniversal

requentlyatinstrumentpanelgauges

erature,oilpressure,ammeteractionand

fercasegearsshouldshift without

veplayor loosenessinsteeringmech-


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CEANDINSPECTION

ientactionofclutch.Clutchpedal

y21/2"freetravel.

thealertforlackofpoweror any

yindicateenginetrouble.Inthiswaythe

mpletebreakdown.Alwaysstopvehicle

eandtheconditionwill beeasiertocorrect.

LandOnly.—Inadditiontotheforego-

owinginspectionprocedureisprovidedfor

evelopsinwheelsitmaybedue to

djustmentandshouldbeinvestigatedand

cursonturnsandsharpcurvesit isan

nflationandexcessivespeedandshould

omaxles,itmaybeanindicationof

rnaxlegearsandshould beinvestigated

pullingto onesideorthe othermay

flation orrepair.Noteandreportineffi-

WaterOnly.—Inadditiontothefore-

wateroperationunderb,thefollowingpro-

eroperationonly.Ifthereis apossibility

terforperiodsof 24hoursormore,it is

n"BeforeOperation,""AtHalt,"and

mplished.

onofeachbilgecompartment,ifpos-

ityofexcessiveleaksorinabilityof bilge

entsempty.Bealerttooperationofbilge

flargequantitiesof waterwhichmaybe

anysectionof hullandtheneedfor imme-

onwhichmaybeanindicationofloose-

aftandbearings.

andauxiliaryintakeopenwhenpos-

ooling.

ulttoidentifyduring operationdueto

ioushullsections.Thedrivershouldtake

ocateandidentifyanythingthat might

tion.Drivershouldimmediatelyreportany

handle.Allinspectionoperationsinthis

perationonlyexceptthosegivenundere.


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TON,6x6

vehiclewhileat halt.

sshouldshowa normalreading.

vetemperatureofbrakedrumsor

anismcarefully.Reporttierodordrag

xcessivelyloose.

conditionoftires.

orlubricantleaksand notetempera-

astenings,etc.

andnote excessivetemperaturesof

.

—EngineStopped

ndreplenishwateriflow.

dconnectionsforleaks.

eckitsadjustment.

ndconditionof theoil.

ATEROPERATION

operationarenecessarytomakesure

sfactoryconditionforimmediateoperation

Unlessimmediatereturntowateropera-

lyafteroperation"inspectionoperation

omplished.

leinWater.Beforevehicleislanded,

oughinspectionshouldbemadeto deter-

roughouthull,inefficiencyofbilgepumps

anism.

—VehicleonLand—Note:Items(1)

mediatereturntowateroperationis

oteexistenceof fueloroilfumes

gefromthevariousunits.

e,operatebilgepumpcontrolstore-

ompartment.

dout withfreshwaterifpossible.All

partiallyfilledwithcleanwaterandthen

pingsystem.

oseallwheels.See thattheyare

rspringsandreport ifhosehasbeen

eration.


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CEANDINSPECTION

esfrom axlesandpillowblocksand

ateroperation.

ethattires areingoodconditionand

peration.

yotherforeignmatterwhichmay

ndwaterpropeller,shafting,rudder,ex-

orunderstructure.

alsat eachendofpropellershaft

uldbereplacedifdamagedin anyway.

andmounting.Lubricatewaterpro-

eroperation,andunlessimmediate

santicipated,it isrecommendedthata

bedrainedfromaxle housingsandcare-

nepossibilityofwaterhavingentered

all lubricantshouldbedrainedfromaxles

and refilledwithproperlubricant.

ichareaccessiblefromexteriorof

VI,"Lubrication".)

ANDOPERATION

larlyimportantaftereitherland or

atthistimethedriver inspectsandtests

tofind anydefectsthatmayhavedevel-

peration.Thedrivershouldcorrectany

rtthosethathe cannothandle.Thesein-

bletothoseitemizedunder"Pre-Starting

ouldbemorethorough.Inspectionopera-

pwith necessarymaintenanceorservice

eshouldneverbeentirelyomittedevenin

sbutmaybereducedtothebare funda-

rformingtheseoperations,drivershould

nyirregularitiesnoticedduringtheday's

t—BeforeStoppingEngine

etshouldkeeplever inappliedposi-

d.

oothlyandinvestigateanyunusual

edduringoperation.

ureis normal.

rmal.

noexcessivedischargeorcharge.

0 atidlingspeed.

ountoffuelrequiredto refilltankand


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ON,6x6

notethe presenceofexcessivefumes

sintheexhaustsystem,fueland oillines

veenginevibration.

veloosenessorrubbing offanbelt

trollinkage.

gandconnections.Allconnections

ry.

esandreportleaks.

gineaccessoriessuchasstarter,gen-

eter,etc.

ndreplenishwaterifneeded.Remove

gerofescapingsteampressure.Ifconsid-

replenishsystem,lookforleaksinradia-

nnections.

ndconditionof theoil.

ureterair cleanerandcrankcase

ughoiltodetectdirt. Ifcleanersaredirty,

ctions.

removefloorboards.Noticeunusual

eleakageoffueloroils fromthevarious

l,cableandlinkage.

ndpowertake-offforlubricantleaks

transfercaseforlubricantleaks.

fercasefor lubricantleaks.

tpropellershaftsand ruddercontrol

xhoseis ingoodcondition.

shafthousingsealsat hull.

terpropellertransfercase,propeller

pillowblock.

aglink andtierodand steeringarms.

sinorderto determineexcessivelooseness.

ofmountingofsteeringgear,frame,

kets,etc.,toseethatattachingboltsand

Observenecessityforadding sealing

.

fromaxlehousings,steering

ggearandpillowblock.


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CEANDINSPECTION

tersuchasnails, glass,stones,or

any.missingvalvecapsandcheckforim-

mswhichmayindicatepullingofvalve

foperatingtireswhensoft.

spensionsforbrokensprings,loose

aks.Seethat springsandclipswhich

earetightand inproperposition.Report

rfromaroundexposedpropellershaft-

aljointbolts.

haftflangenuts.Reportdamagedor

rother attachingparts.

oneachbrakedrumand wheelhuband

msshouldbeapproximatelysametempera-

ataretoo hottotouchwithhandas this

ant,damagedorimproperlyadjusted

ooseormissingsheet metalpartssuch

ebeenpenetrated,looseormissing hatches,

s tightandevenlywound;ifnot,re-

vecable.Checkshearpinandsparesunder

ndswitchesifassignmentpermits

oose,tightenthem.Reportbrokenbrackets

nandfastenings.Makesurethatload

roperlysecured.

uipmentwhichhavebeen"assignedto

re ingoodconditionandproperlylocated.

ANDPREVENTIVE

ntenanceprocedureisgeneraladjust-

newhichrequirestheperformanceofad-

ectofnormalwearthroughoutthe vehicle

ceoperationsnecessary,torestorevehicle

on.Followingprocedureshouldbeper-

d.

etravel.Theamountoffree travelof

startstodisengageshouldbeapproximate-

eportdefectiveclutchaction.


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ON,6x6

sandreportexcessiveloosenessin

elinesandcheckconnections.

onofinsideof hullandbilgecompart-

ndreportdamaged,looseormissingparts.

terminalswithcleanwaterorwith

gsoda.Tightenterminalsat eachendof

ndof batterytostartingmotorcable.Re-

seahydrometerandcheckspecificgravity

trolyteisnot wellovertopofplates,add

nditionsothat distilledwatermaybe

erin battery.

neoilandoil filterasrequired.

mshieldcoverandinspectandservice

eakerpoints,andignitionhigh andlow

.Checkallwiringandconnections.

ineaircleanerand crankcaseventila-

ofallunits withinthehull.Thisshould

neratorcarbureter,engine,powertake-off,

se,axletransfercase,propellershaftuni-

tirepump,etc.

pumpdrivebelt andcentrifugaltype

rviceasrequired.

hullforoiland fuelleaks.Ifleakage

ondition.

omtransmission,transfercasesand

cantis atthecorrectlevel.Serviceas

eplugs.

ewithplenty ofclean,freshwater.

variouscompartmentsandobserveaction

operation.

onandinspectconditionofwinch,cable

chlubrication.

equipmentwhichhavebeenassigned

or,ingoodcondition,andproperlyinstalled

isshouldincludehandtools,pioneer tools,

kits,sandanchor,towchain,etc.

ndattachingparts.Examinehatch

port thosefounddefective.

malldrive axlesancffromsteering

cantisat correctlevel.Serviceasrequired.

nexperiencedduringprecedingweek,itis


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CEANDINSPECTION

lquantityoflubricantbedrainedfrom

becarefullyexaminedtodeterminepossible

ound,unitshould bedrained,flushed,and

nt.Besureto replaceplugs.

tsusedfor attachmentofchassis

ssingboltsarefound,these pointsshould

gcompoundbeforetighteningorreplac-

dwheelnuts.

deofvehicle.

pressure.

ectionsofhull andreportlooseor

swhichrequirewelding.

rlinkageandmounting.Checkfor

kabsorbers.

alsat eachendofpropellershafthous-

tsif damagedordefective.Tightenseal

ringsuspensionsuchasshackles,

etc.

nggeardraglinkandtie rodconnec-

looseness.

adjustment.

shaftflangenuts.

NPREVENTIVEMAINTENANCE

nintervalis toperformlubrication

ceservicesthatwilloffsetnormalwearand

whichmayinterferewithdependableoper-

months.Drivershouldaccompanyvehicle

enpossibleor provideasuitablereportof

ons.

gecanbeestablishedforthisinterval

edoutnecessityofestablishingspecific

erationsitemizedinotherinspectioninter-

edinamoredetailedand thoroughmanner,

tenanceorserviceoperations.

TIONANDPREVENTIVE

nintervalis toprovideanopportunity

rrebuildofmajorunits whichmayprove

etobenecessary.Operationsatthisinter-

e detailedandthoroughmanner,theoper-

accomplishedattheweeklyandmonthly

tablishedmileageintervalmaybesetupin


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ON,6x6

afterserviceperformancehasproven

andpreventivemaintenanceinterval

makevariousseasonableadjustmentsif

yzingtheserviceperformanceofvehicle

hs.

ERATURECHANGES

oBelowFreezing

ngsystem.

eas requiredduringoperation.

dforclimaticandoperatingconditions.

gedRememberthatata gravitylow-

freezeat2° F.

uelsystem.

utionstoseethatengineis operatedat

ature.

soline.

dheatcontrolvalveandadjustcar-

AboveFreezing

omcoolingsystemandflushthesys-

forclimate.

dheatcontrolvalveandcarbureter.

Stop vehiclefrequentlyandinspect

ngon bottomofvehiclewillinterferewith

dshield.

fromcontrolswhenparkingvehicle.

whenparking.Donotparkin water

FORLONG-TERMSTORAGE

esmustbeplacedinstoragefor along

antthatprecautionsbetakentomake

ingoodconditionforoperationwhenre-


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orlubricatedbyordnance

4

nstructionsforTruck,Amphibian,21/2-

hedforthe informationandguidance

rsedeallpreviousinstructions.Materiel

rdancewiththelatestinstructionscon-

lsand/orOrdnanceFieldServiceBulletins.

orallpointstobe servicedbytheusing

ricationGuidewhichspecifiesthetypesof

eintervalsatwhichthey aretobeapplied.

nstructionscontainthesameinformation

whichdata isreproducedare10x15 in.

epartoftheaccessoryequipmentofeach

ntainedinthelubricationguidesis taken

nusingtroops.

EDANDORLUBRICATEDBY

EPERSONNEL

g.Every5,000miles,removestarter

aringthroughoilerwithOIL,engine,

RDS

structionsarecloselyfollowed,

dsatisfactoryresultsarenotobtained,a

ordnanceofficerresponsibleforthemain-

cordoflubricationservicingwillbe


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

ULL

GO5

ntCGVi

)WRS

GVi

GOVi

GO5

CGVi

)WR5

R5

GOS

)WRS

ed

Pointi

ted

ws.

ULL

n.

r,

INE

iversal

pose

rpose

UID,

lic

)


/ h t t p : / / w w w . h


7/27/2019 TM 9-802 GMC DUKW-353


«j

WP

fore

)

cedfrom

isespecified.

ecups)

transfer

n

ng

ECK

g

ngs

epointsafter

rCO— GREASE,generalpurpose

e

P u b l i c D o m a i n ,

G o o g l e - d

i g i t i z e d

/ h t t p : / / w w w . h

a t h i t r u s t . o r g / a c c e s s

_ u s e # p d - g

o o g l e

7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

DLUBRICANTSTOBEUSED

90

dServiceInstructions

ts

applyinglubricant.Lubricateuntil

mthebearing,unlessotherwisespeci-

ntsanduniversaljointsassoon after

e.Also,alwayslubricatechassispoints

refornormalservice.Forextremecon-

d,mud,snow,roughroads,dust,etc.,

. ormoreifconditionswarrant.

aircleaner.Daily,checkleveland

evelwithOIL,engine,crankcase

miles,dependingonoperatingcondi-

.Every2,000miles,also removeair

Crankcasebreather.Every1,000

ry,removecrankcasebreather,clean

crankcasegrade.Powercylinderair

s,oroftenerifnecessary,removecyl-

ashfilterelementin SOLVENT,dry-

e,seasonalgrade,andreassemble.

cleanersisessentialtoprolonged

ywhenengineishot.Refillto FULL

eafewminutesand recheckoillevel.

ged,oneadditionalquartwillbe

hedthroughplug holeinbottomof


G o o g l e - d

i g i t i z e d

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o o g l e

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essuregaugeindicatesoiliscirculat-

0miles,drainfilterthroughdrain

move,inspectandinstallnewelement

miles,orlessif oilbecomesdirty,in-

newingelement,refillcrankcaseto

engineafewminutesand recheck

hecklevelwithtruckonlevelground

canttocorrectlevel;alsomakevisual

reportleakagetoordnancemain-

ubricantindifferentialstolevelof

tedonfrontand bothrearaxles

aflexible hose,toinsideofhull.Make

.Drain,flush andrefillatendof first

ndicatedatpointson chart.When

lyafteroperation.Plugholesare

hrough whichdrainplugsfortrans-

maybereached.

ALJOINTS.Removeplugattop,

tinguntillubricantis visibleattop

ntandrear).Removewheel,clean

Tocleanandpackwheelbearings

movedfromthehub.Followthe pro-

omthehub andwashthemin

tilallthe oldlubricantisremoved

eof cage.

andwashtheinsideof thehub

ng.

oughlydry,packtheraces with

No.2,andreassembleinhub.To

ngitisnecessaryto kneadlubricant

geandinnerrace.Do notapplyany

hehub.Thelubricantpackedinthe

oprovidelubricationuntilthe next

mayresultinleakageofthe lubricant

tenadjustingnutuntil wheel

wheelturnsfreelywithoutside

toposition.


G o o g l e - d

i g i t i z e d

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ON,6x6

earaxleisfull-floatingtypeand

dtoadjust wheelbearings.

gestudnuts whichholdaxle,

andretainer.

hichholdbearings.

s,usingsameprocedureasfor

e.

ghteninnerlocknut untilwheel

,or sufficientlytopermitwheelto

y.

ut,tightenandtestadjustment.

singandmakefinaltestfor ad-

stbeused afteraxlehasbeendis-

orrepair.CAUTION:Studnutsused

bmustnotbe lubricated.

DSLIPJOINTS.ApplyGREASE,

lgrade,tojointuntilit overflowsat

ntuntillubricantisforcedfromend

ip jointsusedonwinchdriveshaft

s.Usehand guntopreventdamageto

e andforwardrearaxle,theuniver-

rgewater-tighttubesandarecovered

erejointsare connectedtoaxle

movedtolubricatethesejointsand

allowsurpluslubricanttoremainon

ows.

NTERBEARING.Mountedontop

achedfromunder hull.Lubricate

ofunitwithLUBRICANT,gear,uni-

evelofplugon sideofunit.

SHAFTBEARINGS.Every5,000

crossshaftseatsand bearings,clean

EASE,generalpurposeNo.2.

ery5,000miles,removeplugsontop

dlubricatewithaboutoneteaspoonful

wdays,removedrainplugtodrain

eelementasnecessaryandwashin

aution:Donotdraininto hull.

500milesrefillgreasecupwith

No.2,turncuponefull turn.Apply


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nkcasegradetowickunderrotor.

withGREASE,generalpurpose,sea-

breakerarmpivotwithOIL,engine,

y.

INGS.Every500miles,paintsides

ht.

y500miles,lubricatesparkandthrot-

surfaceof winchjawclutch,rudder

dercontrolrodends,pintlehook,all

s,latches,etc.,withOIL,engine,crank-

OPERIODICLUBRICATIONSERV-

erator,clutchpilotbearing,clutch

aftsplines,steeringcolumnupper

allstud,winchdriveshaft support

shaftdrivecenterbearing,shockab-

ff.

TROL.Every500miles,apply

ointakemanifoldgatevalve,topre-

Every5,000milespackwithwater


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0

es53

mustbekeptof eachmotorvehicle

epartment.ForthispurposetheOrdnance

7255),generallycalled"LogBook,"is

ndmustaccompanyitatall times.This

erecordofthevehiclefromwhichvaluable

perationandmaintenancecosts,etc.,is

commandersmustinsistthatcorrecten-

ll habituallybekeptina canvascoverto

soiled.

epagebearingarecordofassignment

entering thecombatzone.Allotherref-

tedregardingtheidentityofthe organiza-

hesourcesofgreaterwearto ave-

dgritareallowedto accumulate,particles

obearingsurfaces,causingunnecessary

s notremedied,willsooncauseserious

enginepartsoranyotherunit,in making

,orif,inthe courseofinspection,working

reto beexposed,alldirtand gritthat

xposedsurfacesmustfirstbecarefully

eclean,andcaremustalwaysbe takento

ofbrushingdirt orgritintothe opening

artoftheclothing.Tocutoil-soakeddirt

oad oil,usedrycleaningsolventapplied

brush.Careshouldbetakento keep

asit mightinterferewithproperignition

nformationoncleaningisincludedin

omecloggedshouldbeopenedwitha

neverbeused forthispurpose,assplinters


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permanentlyclogthepassages.Particular

anand decontaminatevehiclesthathave

ck.SeeSectionX,DECONTAMINATION,

n.

ntedbeforeissuetothe usingarms

ncecoatsperyearwill ordinarilybeample

wexceptionsthismaterialwillbe painted

olivedrab,lusterless.Theenamelmaybe

ng oilenamelandoilpaint previously

epartmentiftheold coatisinsatisfactory

suallyissued readyforuseandare

They maybebrushedonsatisfactorily

eoriginal packageconsistencyorwhen

y volumewithTHINNER.Theenamel

enthinnedwith15%byvolumeof THIN-

e usedasathinner sinceitwillimparta

namel).Ifsyrayed,itdrieshard enough

urand drieshardin16 hours.

npaintingiscontainedinTM9-850.

NTING

materialisin poorcondition,itismore

aintfromthesurfacethantouse sanding

terstripping,itwillthenbe necessaryto

tic,shouldbeusedonwoodas abase

Itmaybeappliedeither bybrushingor

actorilyasreceivedor aftertheaddition

olumeofTHINNER.Itwillbe dryenough

dhardin5 to7hours.Forspraying,it may

an 15%byvolumeofTHINNER.Lac-

tothePRIMER,ground,synthetic,within

nhibiting,forbaremetal,shouldbe

oat.Itsuseandapplicationaresimilar to

(b)above.

paintingdependspartlyontheselection

olargelyuponthecareusedi npreparing

g.All partstobepaintedshouldbe free

osene,oil,andalkaliand mustbedry.

FACES

dofcleaning,theyshouldbe washedin


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ON,6x6

of1/2 poundofSODAASHin8 quartsof

entsolution,thenrinsedin clearwater

Woodpartsinneed ofcleaningshouldbe

er,butthe alkalinesolutionmustnotbeleft

nutesandthesurfacesshouldbewiped

shedclean.Whenartilleryorautomotive

onand onlymarredinspots,thebad places

AMEL,synthetic,olivedrab,lusterless

wholesurfacewill thenbesandpapered

a finishcoatofENAMEL,synthetic,

edandallowedtodry thoroughlybeforethe

uipmentisinbadcondition,all partsshould

PAPER,flintNo.2,or equivalent,givena

ynthetic,andpermittedtodryforat

en besandpaperedwithPAPER,flintNo.

d dirt,andfinalcoatofENAMEL,syn-

ssappliedandallowedtodry thoroughly

.

AGE

jorconsiderationinpaintingOrdnance

tionsecondary.Thecamouflageplanat

threefactors:color,gloss,andstenciling.

ENAMEL,synthetic,olivedrab,lus-

toblendinreasonablywellwith the

makesavehicledifficulttosee from

reatdistancesoverland.Avehicle

sypaintcanbedetectedmoreeasily

vehicleshavebeeneliminatedbecause

fromtheair.A bluedrabstencil

cannotbeso photographed.Itisilleg-

sexceeding75feet.

e

bbingmustbe avoided,asitwill

oduceagloss.Careshouldbe takentosee

lywith aspongeorasoft rag.Thesurface

wiped,exceptwhilewet,or aglosswill


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vehicles,paintedwithlusterless

svehicleswerekept whenglossypaintwas

stincreasesthe camouflagevalue.Grease

withSOLVENT,drycleaning.Whatever

be soremovedshouldbeallowedtoremain.

ax-treatedtarpaulinsonthesides

cea gloss,whichshouldberemovedwith

intingwitholive drabpaintwillbe

thbluedrabpainttwiceyearly.

s,thepaintmaybecomesothickas to

es,presentinganunsightlyappearance.If

eold paintbyuseof alime-and-lyesolu-

ails)orREMOVER,paintandvarnish.It

ceoflye orotherpaintremoverbecom-

he equipmentbeperfectlydrybeforere-

preferablethattheuseoflye solutionsbe

ts.Ifusedon wood,thelyesolutionmust

n thesurfaceformorethana minutebe-

edoffandthe surfacewipedwithrags.

shouldbefilled withputtyandthewood

shing.Thesurfacesthuspreparedshould

ections.

edbeforepaintingproceduresare

NGDEVICES

oilholes,and similarlubricatingde-

boutthree-fourthsofaninchindiameterat

llbepainted withENAMEL,red,water

maybereadilylocated.


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7/27/2019 TM 9-802 GMC DUKW-353


nt57

re

h(1)

(1)

(1)

(1)

(1)

ent:

m)

o)

(1)

(1)

(1)

A)(1)

ut(1)

arestowedonthe deckofhull:

e Shovels(2)PickMattock(1)

rriedinside vehicleandfastenedin

ablespaces:

atch

in(1)

hose)

UIPMENT

vewateroperationoftoolsand equip-

willbe subjectedtowater,shouldbethor-


/ h t t p : / / w w w . h


7/27/2019 TM 9-802 GMC DUKW-353


leaned,assaltwaterhasa deteriorating

pmentmountedinandonthis vehicle

dition,astheyarevitalto thesuccessful

cle.


/ h t t p : / / w w w . h


7/27/2019 TM 9-802 GMC DUKW-353


omotivematerial61

RES

stantdangerofgasattack,unpainted

coatedwithengineoil.Instrumentsare

tobeprotectedby oilfromchemicalclouds

munitionisexcluded.Carewillbetaken

theopticalpartsofinstrumentsor leather

notinuse willbeprotectedwithcovers

tionwillbe keptinsealedcontainer.

acticallynoprotectionagainstmus-

rand oilcloth,forexample,willbepen-

The longertheperiodduringwhichthey

hedangerof wearingthesearticles.Rub-

contaminatedwithmustardgasmayoffer

o wearthemseveraldaysafterthebom-

clothingwillresistpenetrationmorethan

ewornlongerthanthis.

sof materialthathavebeenexposed

andlewisitemust becleanedassoonas

rycleaning,orALCOHOL,andwipeddry.

oatedwithengineoil.

beenexposedtogasmustbe thor-

anbefired.To cleanammunitionuse

noncorrosive,orifthisis notavailable,

r.Aftercleaning,wipeallammunitiondry

drypowderedAGENT,decontaminating

decontaminatingcertaintypesofmate-

nsupplies),asflamingoccursthroughthe

iquidmustard.

chemicals(mustard,lewisite,etc.)

gstepsshouldbetaken:

onsacompletesuitofimpermeable

maskwill beworn.Immediatelyafterre-

ughbathwithsoapandwater(preferably


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7/27/2019 TM 9-802 GMC DUKW-353


skinareashavecomeincontactwith

alldrop ofmustardgetsintotheeye,or

sbeeninhaled,itis imperativethatcom-

given within20to30 minutesafterex-

nsaregivenin TM9-850andFM21-40.

mustardwillbe decontaminated.Ifthe

sbeenexposedtovaporonly,itmaybe de-

intheopenair;preferablyin sunlight,for

e cleanedbysteamingfortwohours.Ifthe

sbeencontaminatedwithliquidmustard,

ourswillberequired.Variouskindsof

mprovisedfrommaterialsavailableinthe

materialofdirtthroughthe useof

ustbeburnedorburied immediatelyafter

terialiscoatedwithgreaseor heavy

dberemovedbeforedecontaminationis

ning,orotheravailablesolventsforoil

attachedtoendsofsticks.

ntedsurfacesofthematerialwith

ymixingonepartAGENT,decontami-

ithonepart water.Thissolutionshould

es.Washoffthoroughlywithwater,then

tsand instrumentsexposedtomus-

econtaminatedwithAGENT,decontam-

xedonepartsolidtofifteenpartssolvent

RIDE).Ifthisisnotavailable,use

achingsolutionmustnotbeused,because

rumentlensesmaybecleanedonlywith

smallamountof alcohol,ethyl.Coatall

engineoil.

econtaminating(chlorideoflime)is

ybetemporarilycleanedwithlargeyol-

er,mustardlyinginjoints orinleatheror

ovedbythisprocedureandwill remaina

untilthematerialcanbe properlydecon-

shedfrommaterialinthismannerlies

necessitatingthatthecontaminatedarea

rningsignsbeforeabandonment.

aminatingofmaterialcontaminated

niccompoundsintothesoil,poisoning


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ON,6x6

localityfor eithermenoranimals.

bingthathasbeen contaminated

ghlywithbleachingsolution.Intheevent

nt,itmaybe necessarytoburnorbury

ndecontaminationiscontainedin

C38, 1941,Decontamination.

SFORAUTOMOTIVEMATERIAL

ensubjectedtogasattackwiththe en-

ershouldbe servicedbyremovingthe

Tdrycleaning,andrefillingwiththe

dbecleanedin thesamemanneras

hionswillbediscarded.

entsthoroughlywithbleachingsolu-

edonein thefield.Operatorsshouldcon-

enrunningunderconditionsofhightem-

ationofthemustardor lewisite.

cleswillbedecontaminatedwith

ntingmaybenecessaryafterthisoperation.


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UCTIONS.

NMAINTENANCE

erations62

eterms63

eoperations64

65

6

NCEOPERATIONS

operationsbyvehiclecrewsandmain-

gArmsaredeterminedbyeasewithwhich

ed,amountoftimeavailable,weathercon-

elter,proximityofhostilefire,equipment,

personnel.Sinceall thesefactorsare

ofprocedurecanbeprescribedorfollowed.

onswithinscopeofUsingArmsmain-

arilybasedontwofactors:(1)sufficient

litiesnecessarytodojob.Absenceofany

sarilyplacesmaintenanceoperationinthe

ENANCETERMS

cetermsusedinsucceeding"Alloca-

ations"tableareasfollows:

aning,lubricating,tighteningbolts

rnaladjustmentsofsub-assembliesoras-

movingpart,sub-assemblyorassem-

cingitwith aneworreconditionedorre-

orassembly,whicheverthecasemaybe.

ingrepairsto,or replacingofthe

emblythatcanbeaccomplishedwithout

gthesub-assemblyorassemblyanddoes

orriveting,fittingand/oraligning.

mpletelyreconditioningandplacingin

unserviceablepart,sub-assembly,orassem-

ludingwelding,riveting,machining,fit-

,andtesting.


G o o g l e - d

i g i t i z e d

/ h t t p : / / w w w . h


_ u s e # p d - g

o o g l e

7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

onnelisauthorizedto removeandreinstall

ine,transmissionor transfercaseassem-

mentoffrontandrearaxles,anengine,

seassemblywithanotherfrontorrear

nortransfercaseassembly,mustnotbe

authorizationis receivedfromOrdnance

TENANCEOPERATIONS

tesoperationsallocatedtoUsingArms

peration

place

Replace

andInspection(SectionV)

ghtenBolts,Etc.

on

ctionVII)

eaningandPainting

tionVIII)

Replace

Replace

eplace

onXIII)

bly

ndReplace

k

Adjust

nXIV)

bly

ndReplace

mbly

ndReplace

V)

rvice

eandReplace

erviceandReplace


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7/27/2019 TM 9-802 GMC DUKW-353


NMAINTENANCE

peration

yServiceandReplace

ceandReplace

rviceandReplace

esServiceandReplace

viceandReplace

ceandReplace

andReplace

ServiceandReplace

VII)

ush

ace

Replace

SectionXVIII)

nd

dReplace

gMotorandBattery(SectionXIX)

ce

erviceandReplace

System(SectionXX)

iceandReplace

eplace

esServiceandReplace

torandControl(SectionXXI)

place

g(SectionXXII)

mblyServiceandReplace

sembly...'ServiceandReplace

sembliesServiceandReplace

Tail

andReplace

place

sories(SectionXXIII)

nitsServiceandReplace

dReplace

ndReplace

echanismServiceandReplace


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

peration

e

ce

temServiceandReplace

XXV)

eandReplace

viceandReplace

II)

place

lace

place

eplace

lace

place

SectionXXVIII)

yServiceandReplace

semblyServiceandReplace

rolServiceandReplace

and

place

viceandReplace

viceandReplace

SectionXXIX)

yServiceandReplace

fts(SectionXXX)

sServiceandReplace

ceandReplace

kAssy.ServiceandReplace

SectionXXXI)

sServiceand Replace

Replace

dReplace

ngService

oxServiceandReplace

nXXXII)

embliesServiceandReplace

andReplace

rviceandReplace


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7/27/2019 TM 9-802 GMC DUKW-353


NMAINTENANCE

peration

XXXIII)

erviceandReplace

ceandReplace

XXIV)

ServiceandReplace

e(SectionXXXV)

ndReplace

XVI)

ndReplace

ndTires(SectionXXXVII)

ce

eandReplace

Replace

ndReplace

dReplace

eandReplace

SSIBILITY

is vehiclenecessarilyconcealsoperat-

eof thissectionistodesignateaccessi-

s,andtoexplainoperationsnecessaryto

ehicleunitswhichrequireservicingor

ytableandoperationsdonotincludeparts

yaccessibleandarenotconcealedbeyond

ractice.

allylistsconcealedunits,withaccessi-

eferencetooperations(Para.66)re-

ts.

ATIONS

o hold-downboltssoboltscanbedis-

ps.

wardedgeto open.

more thanhingespermit.

atchCover.Ifaccessgreaterthan

d,completebowdeckcanberemovedby

edgesanddisconnectingradiatorsupports

rtment.However,thisprocedureisnot

tcanber emovedthroughenginecompart-


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


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NMAINTEI

erShaftFront

tThrust

ose

ection

ctions

PipesConn.Hoses

ndHose

dHose

trainer

andHose

ype)


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ForwardRearAxleJ66-f

RearwardRearAxleJ66-f

WaterPropellerFrontG 66-e

WaterPropellerFront'J 66-f

WaterPropellerCenterO66-f

siontoWaterPropellerTransfer

pellerTransferCasetoMain

ovePlugonBulkhead)A66-a

ntingsB66-b

ndDrainB66-b

SuppressionUnitsB66-b

ideA66-a

kageandCablesQ66-g

66-k

op.ShaftHousing(Front)J66-f

tHousing(Rear)G66-e

Prop.ShaftHousing(Front)J66-f

andAdapter(AtMainTransfer

t(ForwardEnd)C66-c

t(RearEnd)..' G66-e

kageD66-d

CableB66-b

-g

lerShaftO66-f

ockF 66-e

ValveandLinesC, F66-c,e

e'...."C,D,G66-c,d,

Take-off)C66-c

tmentD66-d

R66-j

ain(ForwardEnd)D,E66-d,c

ain(RearEnd)G66-e

lerPlugs,WaterPropellerG 66-e

Main,RemoveAccessPlugin

ainG-66-e

tSideandTop)G 66-e

SideandTop)J 66-f

eller(FrontSide)D66-d

eller(RearSide)G66-e

emoveAccessPluginHullBottom.66-1

6-c

66-d

6-c

(Center)O66-f

(Forward)J66-f

(Rear)O66-f

ontJoint'C 66-c

earJointJ 66-f

DriveShaftFrontJointJ 66-f

DriveShaftRearJointO66-f

BoltQ66-g

ontJointO 66-f

arJointand StopCollarQ66-g

earPinQ 66-s

DriveShaftFrontJointO66-f

DriveShaftRearJointO66-f P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

capfromfiller neckanddisconnect

weenfillerneckandstern deckplate

emovefromfillerneck.

wcompletelyloosenedandmaybelifted

eckatleftend andremovedfromvehicle.

hCover

-downboltso boltcanbedisengaged

ht edgetoopen.

more thanhingespermit.

sCover.,Accesscoverisprovidedto

per endofruddershaft.Thisis necessary

movedin anemergencyorforreplace-

ingcovertosterndeckplateandre-

ugsareprovidedinbottonrofhullbe-

nplug,transmissiondrainplugandmain

henaccessplugsareremoved,drainplugs

tsdrained.

nscrewaccessplugbeneathunitto

surethatplugis tightenedsecurely

l.Usewaterproofgreaseonplug threads.


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ALTOOLS

pecialtoolsemployedinthe maintenance

slisted,ortheir equivalent,arerecommended.


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ON,6x6

riverHandle

ndWaterSealDriver

ngNutWrench

terBearingRaceTool

erBearingRaceReplacer

dWaterSealDriver

ator


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RTSANDACCESSORIES

8

EPARTS

arepartsissuppliedto theUsingArms

osepartsmostlikely tobecomebroken,

ceable.Thesetiskeptcompletebyrequisi-

used.Organizationspareparts arelisted

repartsis coveredinthesectionof

andPreservation."

lsandequipmentrequiredforsuchdis-

ngastheUsingArmsis authorizedto-per-

andpreservationofthe guncarriage,

uipment,ammunition,etc.Theyalsoin-

rolls,andotheritemsnecessarytoprotect

inuse,or whentraveling.Accessories

posesotherthanasprescribed,andwhen

erlys.tored.

accessorieswhosenamesorgeneral

eiruse.Others,embodyingspecialfeatures

escribedbelow:

e inemergency—stowedonright-

auxiliarypowertake-off.


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andinspection73

cement75

ntassemblyreplacement76

eplacement77

emblyreplacement78

duction,spiralbeveleddrivingunitwith

universaljointsoneachshaft atthesteer-

yismountedonsemi-ellipticsprings.

mmaintransfercaseto frontaxleby

losedinmetalhousing.Housingis at-

geandrubberbellowstype sealsareused

sprovidedincabto permitdrivertoen-

ontaxleat maintransfercase.Detailedin-

xleengagementanddisengagementare

ration"sectionofthisbook.

al noiseisthefirst indicationofim-

drivingunits.Sincethedifferentialand

amein bothfrontandrearaxlesthe in-

venunder"Trouble-Shooting"inPara.82,

ytothefrontaxle andisnotrepeatedin

ignment,conditionofhousing,andcon-

ssemblieshavemajoreffectsonsteering

eseconditionsaregenerallyapplicableonly

d operation.Themostcommondifficulties,

bleremediesaregivenin thefollowing

auseProbableRemedyParagraph

ead-

t255


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7/27/2019 TM 9-802 GMC DUKW-353



ectCorrectmountingor

pring245

bent

Replacecompleteaxle

utof

gs....284

e

y.Inflatetoproperpres-

un-Installtireshaving

0

al.Adjustwheelbear-

owor Inflatetoproperpres-

sem-

sBalanceorreplaceas-

nc-

eplace249

ciallyTightenspringU-

ts,replacesprings,

sem-

rworn.Adjustor replaceas

atetocorrectpres-

bricatetierod

ighten boltsorre-

-placespringsasfound

necessary.245

tas-


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


entin-

ear.255

rect.Inspectallwheel

y.Inflatetocorrectpres-

NANCEANDINSPECTION

ntenanceandinspectionoperationsas

ventiveMaintenanceandInspection,"

ttheintervalsindicated.Regularinspection

entialtoobtainmaximumservice.This

orfrontwheelalignment.

unitis important,particularlyafter

ceshouldbemadetoSectionVI,"Lubrica-

ubricationintervals,andmethodof

rentialcarrier.

nofthefrontaxleunit, consideration

gnmentunits suchasbrakes,steering

serelatedunitswill affectfrontaxle

MENT

asamajoreffecton steeringfrom

easeofsteeringand safety.Frontwheel

orcauseof prematureanduneventire

dinfrontwheelalignment,whichapplyto

smanual,arecaster,camber,toe-inand

nofthecenter-linethroughupperand

nnionstowardsrearofvehicle,andis

ension"L"inFig.44).The correctcaster

2to2degrees.Thereis noadjustmentfor

tedeterminationofcasteranglerequires

suchasshownin Fig.45,forexample.

umentmanufacturerinmakingmeasure-

oundtobe lessthan11/2degreesor

probablytheresultof loose,saggingor

e housing.Inspectspringsand


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7/27/2019 TM 9-802 GMC DUKW-353


002

ineofTie-Rod

nches)

o TopofAxle

ADJUSTINGSCREWS

rmBall toOut-

gnmentChart


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

re46—CheckingFigure47—Checking

-In

pringsas necessary.Ifspringsandspring

completeaxleassemblyshouldbereplaced.

nclinationof thefrontwheels.Posi-

inationofwheelsasviewedfromfront of

arefartherapart atthetopthan atthe

inus"G"inFig.44).Negativecamberis

lsasviewedfromfrontof vehicle.Correct

eelsonthis vehicleis1/2° to1° positive

adposition.Thereis noadjustmentfor

erminationofthewheelcamberanglere-

ments(seeFig.46 forexample).Follow

'sinstructionsintakingmeasurement.

ooseknuckletrunnionbearings,bent

xlehousingwillaffectwheelcamber.If

bergreaterthan1° orlessthan1/2°,inspect

replaceasrequired.Incorrectcambermay

evenorexcessivetirewear.Unequalcam-

ullto oneside.

ywhichfrontwheelsarecloserto-

therear(dimensions"A"minus"B"in

hisvehicleis 0"tofa"measuredatwheel

redatcentersoftiretread.Anadjust-

etwosteeringknuckles,isusedtoadjust

ugedesignedforthe purposeshouldbe

toe-inmeasurement,followinginstrument

ns.(SeeFig.47.)Loosewheelbearings,

knucklesupport,damagedwheels,bent

ehousingorabent orimproperlyadjusted


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7/27/2019 TM 9-802 GMC DUKW-353


oe-inis foundtobeincorrectadjust

edinPara.284or replacewheelsifdam-

rodtocorrecttoe-in.Alwayscheckcastor

djustingtie-rod.Thetie-rodhasfiner

eft-handendthanonrightend (12per

entatbothendsoftie-rod,a finedegreeof

made.

edure

pressure(40Ibs.)andplacevehicleon

frontwheelsinstraight-aheadposition.

dtie-rodboltfromeach steeringknuckle

tie-rodyokefromsteeringknucklesupports.

eyfromeachtie-rodyoke.Screwyokesonto

dtocorrecttoe-in.Toe-inwillbeincreased

t-handyoke(coarsethreads)oneturn

ing left-handyoke(finethreads)one

eversingthisprocesswill decreasetoe-in

onnecttie-rodtoeachsteering

rodboltinplace.Itis notnecessaryto.re-

menthasbeen made.Measuretoe-inand

ry,untiltoe-inisbetween0" and1y

.Whenfinaladjustmentiscomplete,in-

t nutsuntiltheyaresnug, thenbackoff

ewcotterpins.

odyokeclampwithholeinkeyaligned

sertclampbolt (twoateachyoke)and

ngnewlockwashers.Lubricatetie-rod

cationchartfor thisvehicle.

emaximumanglethroughwhich

mthestraight-aheadposition.Thisangle

heelthantheoutsidewheelon aturn.The

wheelis 28° to29° (dimension"C"in

heoutsidewheelis24°-15' to25°-6'(di-

opscrewson axlehousingareprovidedfor

e throughwhichtheinsidewheelcan

entProcedure

eleft position.Adjuststopscrewuntil

wheelinaccordancewith"Specifications."

gleinstrumenttoobtaincorrectangle,

ufacturer'sinstructions.

givingcorrectreadingforangle


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TON,6x6

gle"D"forright wheel.Ifthisangleis

willbeincorrect.Bent,looseor twisted

dition.

pscrewtohousingwhen angleisset

t-handwheelby turningwheelsto

ngoperationsgivenforleft-handturning

LYREPLACEMENT

yberemovedasa completeunitby

f vehicleonblocks,removingfender

onnectingbrakeconnections,shockab-

glink,axlepropellershaft,and springs

ndwheels

chingeachfenderskirttohull and

ollyjackunderfront axledifferen-

axlehighenoughtopermitre-

frontwheels.

ehicleonblocks

ckoffront axle,placingblocksin

upportentire frontendweight

etohull.Blocksmustbehigh

walofaxleassemblyondollyjack.

owerjackuntil hullrestsonblocks

ck.Disconnectbrakeconnectionsat

givenin Para.102mustbefollowed

orbersanddraglink

hinglowerendofshockabsorber

umperblockandremovetaperedpin.

llstudin steeringarmatleft-hand

lstuduntil topofnutis beyond

ut toloosentaperedstudfromarm,

vestudfromarm.

lershafthousingandshaft

sataxleendofhousingfromdiffer-

nPara.225. Disconnectpropeller

instructedinPara.226.

tsateachspring andremove"U"

ackandwithdrawfromunderneath


/ h t t p : / / w w w . h



7/27/2019 TM 9-802 GMC DUKW-353


osprings

assemblyondollyjackandmoveinto

seassemblyintopositionagainst

ngcenterboltheadsenter holesin

ing"U" bolts,springbumperplate

oltandplate.Tighten"U" boltnuts.

ersandbrakelines

ughlower endofshockabsorber

allnutonpin,and tightennutateach

brakeflexibletubingathullconnec-

sin accordancewithinstructionsin

tandpropellershaft housing

l studinsteeringarmat leftend

dtightensecurely.Locknutinplace

hpropellershaftataxle drivepinion

Attachhousingandseal ataxledif-

edinPara.225.

ion

ganduniversaljoints.Addorre-

inaccordancewithlubrication

nment

mentfactorsinaccordancewith

thissection.

VERSALJOINTASSEMBLY

ointassembliesmaybe removed

teaxleassemblyfromvehicle.However,it

eel,hub,brakeshoesandanchorplate

acer,hubinneroildeflector,brakedust

e.NotifyOrdnancePersonnel.

EARINGREPLACEMENT

tmentofsteeringknuckletrunnion

ofaxleshaftanduniversaljoint assem-

al(seal attachedtoinnersideofsteering

ndsteeringknuckletrunnions.

operations,inspectionshouldbemade

ringhousing.Removelubricationfitting

cant.Ifoil showspresenceofsaltwater,

eremoved,washed,andassemblythor-


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7/27/2019 TM 9-802 GMC DUKW-353


kleandUniversalJointAssembly

ofknucklesupportwithspecial

nFig. 52.

same tool.

eamto sizewithreamerKM-347.

es

ofbendingortwisting.Checkcondi-

odandin yokes.Inspectboltholes

PositionshownonFrontAxle


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

nstruction

placeofanythataredamagedor

hyokeson steeringknucklesup-

andinstalltie-rodbolts.

dofRemovingandInstalling


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n

dasinstructedinPara.74 inthis


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andinspection83

ement84

5

6

emblyreplacement87

ralbevel,fullfloatingdriving axles

Alldrivingandbrakingloadis takenbyrub-

reebetweeneachaxleand vehicleframe.

supportedbyinvertedsemi-ellipticsprings

tsonends oftrunnioncrossshaftandwith

housings.

mmaintransfercaseto forwardrear

opellershaft.Powertorearwardrearaxle

ercasetoa pillowblockontopofforward

cetorearwardrear axlebyanotherpro-

tstoforwardrearaxle andtopillowblock

ings,hingedatone endtohullbulkhead

ypesealsateachend.

ally-thefirstevidenceofimproperfunc-

s.Occasionally,noiseswhichseemto

becausedbysome otherunit,suchas

on.Also,impropertireinflationoruneven

seofanoisewhichseemsto comefromthe

sofaxledifficultiesandprobableremediesare

paragraph.Thetableapplies,in general,

ProbableReferto

auseRemedyParagraph

dor

eck

dInflatetiresto correct

pressure(40lbs.)or


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7/27/2019 TM 9-802 GMC DUKW-353


ause

ot

utof

-

gears

rlu-

-

yOr

ng

Axle

s

orn.

utof

-

ar

NANCEANDINSPECTION

ectionV,"PreventiveMaintenance

sindicated,shouldbeaccomplishedon

drearaxles.

detopreventivemaintenanceandin-

hpertaintootheralliedunitssuchas wheels,

tc.whenaccomplishinginspectionopera-

"Lubrication"fortypeoflubricant,

ethodsofdrainingandflushingdifferen-

YREPLACEMENT

two rearaxlesrequiressupporting

blocks,supportingaxletoberemoved


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ON,6x6

g

,disconnectingattachingparts,moving

ngsand withdrawingsidewisefrom

gs.53and54)

icle

etrunnioncrossshaftbracketsand

allloadisremovedfromrear springs.

Thensupportaxleto beremovedon

ise jackuntilallaxleweightis

ckislocatedtopermitwithdrawal

g.

nPara.283.

xlebrakewheelcylinderflexiblecon-

esonlytoforwardrear axleremoval.

sherswhichattachpillowblockto

lehousingandsupportpillow block

ershafthousingwillnotbe damaged.

lershaft

nnectpropellershafthousingand

rentialcarrieras explainedinPara.

disconnectpropellershaftatdiffer-

226.

s

sfromthethreetorquerod endsat


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7/27/2019 TM 9-802 GMC DUKW-353


ndforcetorquerodpins outof

ketsharplywithaheavyhammer

ngwithclawbar.(SeeFig.54 for

y

ack,moveforwardorrearward

tofbracketsonaxlehousing.Then

awaxleassemblysidewisefrom

positionundervehicle

blyondollyjackandroll intoapproxi-

e.Raiseassemblyondollyjackuntil

withbracketsontopof axlehous-

andaxleinto positionwithspring

mtorquerodendpinsand seethat

andfreefrom dirtorgrease.Con-

lebyinsertingtorquerodpins inaxle

olowerrods,forcingtorquerodand

ga heavyhammerandblockof

ockwasheroneachlowertorquerod

Install uppertorquerodina similar

shaft

ectpropellershaftandpropeller

alcarrierasexplainedin Para.226.

ectpropellershaftatdifferential

.226.

esonlytoforwardrear axleinstal-

ketattopof forwardrearaxlehous-

gnewlockwashers.Tightenscrews

bleconnectionsathullconnection

nstructionsgiveninParas.93and

movejacks

dinPara.283.

wardrearaxleandremove.Lower

nnionbracketsandremove.


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http://slidepdf.com/reader/full/tm-9-802-gmc-dukw-353 115/401 P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h


7/27/2019 TM 9-802 GMC DUKW-353


eShaft

dhubsurfacesareclean.Placea new

ftandinsert splinedendofshaftin

eddifferentialside gears.With

nstallthe eightshaftflangecap

telyuntilallare tight.Bendtangs

heads.

ARRIERASSEMBLYREPLACE-

ntialandcarrierassemblyisbeyond

nnel.RefertoOrdnancePersonnel.


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andinspection91

system93

ments94

acement95

acement96

eplacement97

ent98

cement100

acement.'101

ehosereplacement102

03

mreplacement104

gereplacement105

ON

Fig.57).Serviceorfootbrakesystem

lictypeandoperatesbrakeshoesat allsix

ystemincludebrake pedal,pedallinkage,

inders,Hydrovacunit(powercylinder,

lavecylinder),vacuumcheckvalve,

es.

akebandisexternalcontracting

operatesbrakebandatrear oftransfer

ectedwithhandbrakeleverlocatedwithin

stemconsistsofhandbrakelever,brake

brakedrum,andconnectinglinkage.

nofservicebrakesisdependentupon

s—hydraulicandvacuum.Thesetwo

edinsuchamannerthathydraulicpressure

hcontrolsvacuumandatmosphereinpower

eoperatingsystemconsistsofa master


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7/27/2019 TM 9-802 GMC DUKW-353


erateachwheel,Hydrovacslavecylinder,

hoseorlines.Mastercylinderisoperated

onnectinglinkage.Briefly,thehydraulic

pleofpressingacolumnof fluidwithwhich

areoperatedtoforcebrakeshoes against

gsystem,consistsofaHydrovacunit(re-

ndhydraulicslavecylinder),checkvalve

gandlines.Thissystemutilizesengine

ospheretooperatepowercylinder,which

sufficienthydraulicpressurenecessary

ntofpowercylinderpistons,controlledby

forcesfluidfromhydraulicslavecylinder

chwheelcylinder.Asbrakesarereleased,

yvalvedrops,shuttingoffatmospheric

andopensbothsides ofcylinderpistonsto

eleasedbyreturnsprings.

yinghandbrake,leverlocatedatleft

everis movedrearward.Thismovement

d,locatedatrear oftransfercase,through

bydrawingbrakebandandliningassembly

.Whenbrakesarereleased,leveris moved

tanceofreturnsprings,lining isreleased

reusuallyreflectedbyoneor moreof

ablefollowing.Wheneverbrakedefects

bebornein mindthatcauseforthis condi-

misadjustmentorfailuretoproperlyservice

esto functionproperlyissometimes

bearingadjustment,loosespringclips,and

servicingbrakesystem,referto"Trouble-

closelyassociatedunitssuchaswheels,


reandpoorstop:

yad-

ning.ReplaceHydrovac..99

tion-

9


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7/27/2019 TM 9-802 GMC DUKW-353


7/27/2019 TM 9-802 GMC DUKW-353



m.Tightenallconnec-

rlyad-

ceshoeandlin-

oning.Cleanorreplace....101

ner.Cleanorreplace.... 100

eplaceshoeandlin-

Replaceshoeand lin-

hor.95-96

eedandrefill 93

Replace102

rd

adjust94

Replaceshoeandlin-

ercyl-

csys-

93

htenorreplace

yad-

Replaceshoeand lin-

hor.95-96

hoeandlin-

aceshoeandlin-

cehuband

ceshoeandlin-


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ause

action

yad-

yad-

95-96

erly

e.

hoe

.

yad-

erly

erpis-Replacewheelcylin-

Replace102

eplaceshoeandlin-

rlyad-

sys-Bleedandrefillentire

derReplacemastercylin-

ave

laceHydrovac..99

pedal pressure


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7/27/2019 TM 9-802 GMC DUKW-353



yad-

rlyad-

or.Tighten95-96

ceshoeandlin-

Replaceshoeandlin-

NANCEANDINSPECTION

mal operationconditionsmaybecome

hatsatisfactorybrakeefficiencyisnot

stemisthoroughlyinspectedandtested

ortheseconditionscanusuallybe avoided.

llyapparentwhenexcessivepedalpres-

brakes,also whenlightpedalpressure

application.Alsoreferto "Trouble-

rothersymptomsandcauses.

ortantthat allvacuumlinesand

vententranceofatmosphere,otherwise

etebrakingsystemisseriouslyaffected.

whenmakingteststhatat noplaceinthe

cuumbeobtainedthanexistsin theintake

mportantthatthetest firstbemadeatthis

etheactualmanifoldvacuum.Referto

f testingformanifoldvacuum.

vel.Hydraulicfluidlevelin master

datregularintervalstodeterminethat

evelisallowedto becomelow,airmay

eormore oftheconditionsoutlinedunder

a.90b.Fluidshouldbekepttowithin

rakelinesandflexiblehose should

anyevidenceofhydraulicfluidleakage.

ctedvisuallyifadjacentpartsappearto be

owlevelofhydraulicfluidinmastercylin-

nthatsystemisleakingatsomepoint,

der,whereitis notvisible.

erbrakeshoesarenotproperlyad-

ybegeneratedatbrakedrums.Alldrums

ametemperature.However,anabnormally

sthatthebrakeson thatparticularwheel

yandmaynotbe adjustedevenlywith


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

n overheatedconditionisfound,this

hthepossibilitythat thewheelbearings

ed.RefertoParas.284 and286forproper

bearings.

ment.Checkclearancebetweenmas-

stop screw.Thisdimensionshouldbe

esthatadjustmentisnecessarythiscan

dinPara.98c.(4).

t.Inspecthandbrakelinkage,brake

ngtodrum clearanceand,ifnecessary,

tedinPara.103b.

t.Checkclearancebetweenbrake

epedalshouldjust touchtoeboardinre-

kesheavilyagainsttoe boardthisindi-

maynotbefully released.Adjustas

se.Carefullyinspectvacuumline

scondition.Ifany indicationsareapparent

ouldbe replaced.Keephoseclampstight.

S

ouldbemadeto determineifhydrau-

efunctioningasacompleteunit.If either

workingproperlythecompletebraking

affectedthatproper brakeefficiencywill

ivemeasureshavebeenmade.

mLineTestProcedure

chingvacuumlinetoHydrovaccenter

gaugetoendofvacuumlineso that

t.Startengineandnotevacuum

eaksexist,will bemanifoldvacuum.

top engine.Observerateofvacuum

ethan1" every15secondsthisindi-

valveisnotseatingproperlyor that

ne oftheconnections.Inspectand

eplacevacuumvalveasdirectedin

oryresultshavebeenobtainedremove

ctvacuumlinetocenterplatetee being.

onsothatthereare noleaks.

yValveTestProcedure

es

f powercylinderandattachvacuum

atcenterplateandattachvacuum


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betightsothatthere arenoleaksat

andnotevacuumgaugereadings.

augesshouldbesameas atmanifold

ngcannotbeobtained,itindicates

tvacuumlineconnections.

top engineandnoterateofvacuum

ethan2" every15seconds,when

alvetestsaresatisfactory,itindicates

cunitand completeunitshouldbe

kes.Vacuumgaugeatcenterplate

dvacuumwhilegaugeatrear of

zero.Stop engineandnoterateof

enterplate.If rateofvacuumdrop

econds,itindicatesthatvacuumand

orpowercylinderpistonsealsare

houldbereplaced.Removevacuum

at rearofpowercylinder.Replace

urely.

rTestProcedure

eafewapplicationsofbrakesto

hmightbepresentinHydrovacpower

Removebleederscrewatanyoneof

ydraulicpressuregaugeinbleed

onsecurely.

edapplybrakesandnotehydraulic

denotethat brakefluidispassing

ylinder,whichmakesitpossibleto

rovacfailure.Thishydraulicpres-

akemastercylinder.

sapplied

amepositionstartengineandnote

sure.Ifhydraulicpressureincreases

ndicatesthatHydrovacslavecylinder

yonapplication.

uicklyandnotedropof hydraulic

urereturns tonear"0"immediately

dervalveis functioningsatisfac-


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TON,6x6

augeattachedatwheelbleeder

wandtightensecurely.

CBRAKESYSTEM

perationsmakeitnecessarytodis-

whenanyconditionsoutlinedunder

vident,itisnecessarytobleedentirebrake

sedateachwheelcylinder,alsothreebleed

acunit.WhenbleedingHydrovac,itis

screwsbebledintheir properorder"D",

Fig.69.Twobleedingsystemsareused

ocedureofthesetwomethodsarede-

ollowing.

ssarytoaddbrakefluid,only Delco

ckheed21hydraulicfluidshouldbeused.

bberpartsto swellorotherwisedeterio-

turereplacementofall brakeunitswhere

edure

er

hinglefthanddriver'sfloorboardto

outofvehicle.Removefillercap

enusingpressuretank,No.CSM-CS-

is uptopetcockaboveoutletand

airpressurebeforestarting bleeding

ngtankhosetomastercylinderfiller

sizefitting.

Fig.58)

ckwasheratwheelcylinderorHy-

achbleedertube,No.KM-J-747,in

eoppositeendofbleedertube insuit-

ldhavesufficientfluidtocoverendof

.58)

hichshould be10to20 lbs.and

shut-offvalve.Openshut-offcock

eedervalvescrew3/4turn incounter-

atendofbleederhose.Closebleeder

bubblesstopandfluidcomesoutin

ederhoseandinstallcapscrewand

perationatallsixwheels,alsoat

emovebleederhoseattachedto

Reinstallfloorboardandattachto

dure.Manualbleedingrequiresfilling


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

akesbyTurningWheelCylinderCap

ingToolInsertedthroughOpeningsin

umaswheelisturned byhand.Back

hestoprovideproperrunning clear-

andbrakedrum.Repeatforegoing

shoes onfrontaxle.

vers

versovereachadjustingholeinback-

verspreventsentranceofdirtatthese

undbyremovingjackfromunder-

(Fig.60)

djustment

eckwheelbearingadjustmentas

erbrakeshoeadjustmentcannot

bearingsarecorrectlyadjusted.

djustingpinionshaft asshownin

ockwisedirectionuntillining

brakedrumas wheelisturnedby

ofa turnwhichwillprovideproper

enbrakeliningandbrakedrum.There

heel.Adjustall fourbrakeshoes

erwheeltogroundbyremovingjack


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7/27/2019 TM 9-802 GMC DUKW-353


kesbyTurningPinionStudsin Clockwise

rrows

BLYREPLACEMENT

raphincludereplacementofall

rakeassembly.Ifonlynecessarytore-

nstructionsoutlinedasfollows(Fig.61).

eplacement

s.95b.— (1)through(3)forre-

ugh(8),except(6)forinstallation.

replacement


ugh(8),except(6)forinstallation.

ment

s.95b.— (1)through(6)except

(2)through(8),except(3)for

acement


ugh(8)forinstallation.

cement

aras.99b. forremovaland99c.for

dbrakeleverrearwardas faras

axleandliftuntil wheelisclear

studnutsandremovewheelfrom

yfrombolt headsandremove


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

H.Shown)

ar

ont

getohub.Removeflangeandgasket.

fromflatsoflocknut.Removelock

utandwasher.Pullhub anddrum

movefromaxle,outerbearingcone

time.

amp(Fig.62)

poverendsofwheelcylindertokeep

rtoFig.62for methodofinstalling

brakeshoereturnspringpliersto

shoesinmannershown.

singscrewdriverandhammerin

3.Removeanchorpinattaching

eandlining assemblywithlinkscan

ed.

r

ndlockwashersattachingwheelcyl-

Pull cylinderfromdustshieldand


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7/27/2019 TM 9-802 GMC DUKW-353


hosewithouttwistinghose.See

plateanddustshield

dlockwashersattachinganchorplate

nnowbecompletelyremoved.Remove

kwashersholdingspacer,oildeflector

gknuckle.Spacer,oildeflectorand

mpletelyremoved.

anchorplate

againststeeringknucklewith

wheelcylinderopeningattop.Re-

ceragainstdustshield andinstall

kwashers.Tightencapscrews

lateagainstspacerwithguideplates

orendtowarddustshield.Install"six

ers.Tightencapscrewssecurely.

ghwheelcylinderopeningindust

linderusinggasketbetweenhose

deronhosesecurely.Donottwist

tachcylindertodustshieldusing

ashers.Tightenscrewssecurely.

kstoanchorusing anchorpin.Both

andliningsare alike;however,re-

whichareoffsetso thattheyare

t shoeend.Besureshoesare in-

tion.Installnewlockin anchorpin

at lockengagesgrooveallaround.

n spring

ring throughholeinbrakeshoe

cialplierstoattachoppositeendof

stratedinFig.62.Duringinstalla-

oesseatinwheelcylinderadjusting

CS-1038wheelcylinderclampplaced

e ofremoval.

wheels

adjustwheelbearingsasdirectedin

nhubsand replacehubstudnuts.

ternatelyuntiltight.Againcheck

t.


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TON,6x6

WheelCylinderClampandUseofBrake

bebledafter anyunitshavebeen

tesdisconnectingbrakelines.

ctedinPara.94b.

liningshavebeenrenewed,orwhen

blieshavebeeninstalled,it isofut-

kesbecarefullyadjusted.Maximum

obtainedimmediatelyifliningsare

tiontoaxlespindle.Brakelining

relationtofaceofbrakedrum

ncycanbeobtained.Brakelining

illustratedinFig.65,whenused

ccompanyingunit,providesmaxi-

nganddrum.Useofthis unitelim-

adjustmentafternewbrakelinings

erneedofadjusting brakesafter

foruseofdummydrum,is elim-

uedtoexactbrakedrumdimensions

icrometerasshowninFig. 66.

LYREPLACEMENT

raphincludereplacementofall com-


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7/27/2019 TM 9-802 GMC DUKW-353


assembly.If onlynecessarytoreplace

outlinedasfollows(Fig.67).

eplacement


ugh(9),except(7),forinstallation.

replacement


ugh(9)forinstallation.

ment

s.96b.— (1)through(6),except

—(2)through(8),except(3),for

dustshield replacement

s.96c.— (1)through(7)for re-

gh(8),forreplacement.

dbrakeleverrearwardas faras

axleandliftuntil wheelisclearof

udnutsandremovewheelsfromhub.

ayfromheadofcap screwsandre-

achingaxleshaftHangetohub.

sketbypullingstraightout from

fromHatsoflocknut.Removelock

utandwasher.Pullhub anddrum

movefromaxle,outerbearingcone

time.

amp

poverendsofwheelcylindertokeep

rtoFig.62for methodofinstalling

brakeshoeretufnspringpliersto

shoesinmannershownfn Fig.62.

singscrewdriverandhammerin

3.Removeanchorpinattaching

eandlining assemblywithlinkscan

ed.

r(Fig.64)

ndlockwashersattachingwheelcyl-

Pull cylinderfromdustshieldand

hosewithouttwistinghose.


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ON,6x6

eShoeAnchorPinLockswithScrewdriver

plateanddustshield

hersandboltsattachinganchorplate

usingflange.Anchorplateanddust

elyremoved.

anchorplate

againststeeringknucklewith

wheelcylinderopeningattop.Place

hieldwithoffsetat anchorendto-

ts,lockwashersandnuts.Tighten

yuntiltight.

ghwheelcylinderopeningindust

linder,usinggasketbetweenhose

deronhosesecurely.Donottwist

tachcylindertodustshieldusing

ashers.Tightenscrewssecurely.

kstoanchorusing anchorpin.For-

ndliningassembliesare alikeand

position.Installnewlockinanchor

nerthatlockengagesgrooveall

n spring

ring throughholeinbrakeshoe

cialplierstoattachoppositeendof

stratedinFig.62.Duringinstalla-

oesseatinwheelcylinderadjusting

CS-1038wheelcylinderclampplaced

e ofremoval.


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7/27/2019 TM 9-802 GMC DUKW-353


keflexibleHosefromWheelCylinder

adjustwheelbearingsasdirected

bstuds andreplaceinnernut.

ternatelyuntiltight.Install outer

eplaceouter nuts.Tightennuts

iltight.

bebledafter anyunitshavebeen

tesdisconnectingbrakelines.Adjustbrake

4.

pingsurfaceofflangeandinsert

axle housing.Turnshaftasneces-

gearsplines.Installcapscrews

dof screws.Tightenscrewsevenly

Bendlipsof lockplateagainsthead

describedin Para.95,isrecom-

ingshavebeenreplaced.

ACKETREPLACEMENT

orbracketis notgenerallynecessary,


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ON,6x6

BrakeLiningGrinderforTrueingSurface

toAxle Spindle

werplantorwhenreplacingpedalbushing.

hinglefthanddriver'sfloorboardto

dout ofthevehicle.Removescrews

eboardaroundclutchand brake

e.

brakepedallinkage

vispinattachingpullrod tobrake

moveclutchpedallinkagebyremoving

chingbellcrankto idlershaft.

kepedals

outerendof pedalshaft.Remove

ttachingpedalshafttomounting

andoutof mountingbracket,pedal

removedfrombracket.Remove

washersattachingbrackettotrans-

ousing.Bracketcannowbecompletely

pedalbracket

ctpositionandinstallthree cap

Tightencapscrewssecurely.


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7/27/2019 TM 9-802 GMC DUKW-353


etertoMeasureBrakeDrumDiameter

pedals

sshaftandstart plainendofcross

pedalbracket.Placebrakepedal

acketandshovecrossshaftthrough

handbracketboss.Turnshaft tc

ampbolt holes.Installbolt,lock-

utsecurely.Replaceretainerspring

edalshaft.

age

eandreadjustclutchasdirectedir

rod

pin attachingrodtobrakepedal

ntoeboardandpedalandreadjust,i]

ara.98c.(5).

andfloorboard

teeringcolumnandpedalson to(

Installfloorboardand attachtosup

htenscrewssecurely.

EPLACEMENT

locatedbetweentwosupportinj

edtoleft-handframesiderailby bolts


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

.H.Shown)

ear

ront

g

g.68)

rboard

utleft-handfloorboard.Disconnect

ke mastercylinder.

ndreturnspring

pringextensionatclevispineye.

vispinconnectingpullrodadjustable

peratinglever.

erandbrackets

ersandboltsattachingbracketsto

ofmastercylinder,brackets,cross

ecompletelyremoved.

Fig.68)

ndbrackets

bracketassemblyinsideleft-hand

urboltsthroughframeside railand

hersandnutsonbolts andtighten


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ylinderMountingBracketsandLinkage

asterCylinder

s

ke

t

d

p

ntofmastercylinder.Tightenfit-

akageofhydraulicfluid.

pushrod

cknut.Turn pushrod(Fig.68)

ctspistonwheninreleasedposition.

nrear endcontactsstopplateat

rbarrel.If pistonisnotallowed.to

tion,pistoncup willcoverfluid

nder,therebypreventingfluidenter-

onreturn stroke.

haftinner leverclearance(Fig.68)

fstopscrewandshaftinnerlevermust

ndturnstop screwindirectionneces-

on.Tightenlocknut whenadjust-


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ngth(Fig.68)

cknutandturnyoketo lineupholes

thatclevispincanbe easilyinstalled,

tion.

turn spring

eyoketomastercylinderinnerlever

pin. Attachreturnspringtoclevis

ember.Entirebrakesystemmustbe

.

ENT

edtoright-handframesiderail (Fig.

heneverpowersystemtestindicatesthat

ed,itisnecessarytoremovecompleteunit.

gs.57and69)

nhoseclampscrewsattachingvac-

dehosebackonlineand off"tee."

nletandoutletlines

etlineatfrontendof slavecylinder,

derto Hydrovac)atsideofslave

Hydrovactorearsupportbracket.Re-

ockwashersattachingfrontbracket

.Hydrovacassemblywithfront

etelyremovedfromvehicle.

Figs.57and69)

clewithslavecylindertowardfront

op.Insert2 clampstudsthrough

stall 2nuts.Place2bolts through

racketusinglockwashersandnuts.

nutssecurely,alsotighten2 nuts

mastercylindertoHydrovac)to

sing.Attachoutletline(to wheel

ylinder.Tightenfittingssecurelyto

ks.Attachvacuumlineto"tee"at


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7/27/2019 TM 9-802 GMC DUKW-353


acUnit,AirCleaner,Vacuumand

n

I

K

CylinderP

ylinders

heelCylinders

heelCylinders

ngrubberhoseand2 hoseclamps.

opreventatmosphericleak.

nstalled,itis necessarytobleed

ectedinPara.93.

ANERREPLACEMENT

ttachedtoHydrovacunitasillus-

ngpowercylinderthroughrelayvalveis

nair cleaner.Airpassingthroughcurled

chisoiled,is cleanedthuspreventingdirt

andpowercylinder.

ltsandslidehose backontube.


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ON,6x6

wofHydrovacCleaner

herattachingaircleanertobracket

ell.Cleanercan nowbecompletely

r

sherholdingcovertoshell.Remove

dhair,innerscreen,andstemfrom

ry cleaner,loosenaccumulated

hcompressedair,afterdepositsof

aturatecurledhairin lightengine

ainoff.

r

shell andinstallinner(small)

aceoiledcurled hairevenlyaround


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7/27/2019 TM 9-802 GMC DUKW-353


ofVacuumCheckValve

ter(large)screeninside shellwith

er.Replacecoverandsecureinplace

.

roughmountingbracketandinstall

ennutsecurely.

warduntilhoseis overstem.Locate

ndtighten clampboltssecurely.

LVEREPLACEMENT

ethatcheckvalveisnotseating prop-

edandcleanedor replaced.

connectionsandvalve

tubenutfromelbowat bottomof

owfrombottomofcheckvalve.Re-

ecialelbowfittingattachedtomani-

tting.


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

Con-

hut-Off

Fig.71)

ve

efourscrewsandlockwashersat-

alvesofbodytogether.Separatetwo

ckvalvecannowbeliftedfromlower

valveseatinlowerhalfof valvebody.

emoveanyslightimperfectionsor

emble

valve,alsoguidein lowerhalfof

rsealatvalveand ifdeterioratedor

t.Placelongendof valvesteminto

g.Placegasketbetween'twohalves

alvesofvalvebodytogetherand in-

ashers.Tightenscrewsevenlyand

cialelbowfittingattachedtomani-

eventatmosphericleaks.Thread

andtightensecurely.Attachtube

curely.


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7/27/2019 TM 9-802 GMC DUKW-353


r

and

tionat

ear

NDFLEXIBLEHOSEREPLACE-

esandflexiblehose,usedbetween

cunitandwheelcylinders,areshownin

g.Hydrauliclinesarespecialmetal

thstandhighpressure.Wheneverneces-

o

and

atLeft

Wheels


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

Con-

gnear

e lines,itisimportantthat thisspecial

ytubing isnotsatisfactory.

ose,usedbetweeneachwheelcyl-

nnections,isspecialflexibletype,made

.

ock.Shut-offcock,locatedopposite

ndframesiderail,isprovidedto shutoff

elcylinders.Ifflexiblehose orhydraulic

ged,cockcanbeclosed,andrearbrakesonly

— rightfrontandforwardrearwheels

siderailattaching"tee"to flexible

elocknutattachingflexiblehoseto

out ofhullandframefromoutside

eelcylinder(Fig.73).

— leftfrontandrearwardrearwheels

inghydrauliclineortubingto endof

siderail.Removenutand gasket

hingflexiblehoseto framesiderail.

framefromoutsideandremovehose

4).


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7/27/2019 TM 9-802 GMC DUKW-353


sortubing

esissame exceptthatsomeuse

ers,thereforefollowingremovalin-

Removefittingnut ateachend

om"tee"orotherfitting.Remove

ttachingcliptoframesiderail or

ipsandfittingnuts cannowbe

(Figs.76, 77and78).Whentube

twill benecessarytocuttubetoproper

tcouplings.Tubingthatisnot properly

rakesto beineffective.CutandHaretubing

esiredlength,usingKM-KMO-3special

ening.Squareofftheend withafine-cut

arpedgeswithreamerbladeprovidedon

ncouplingnutsontubing.Dipend of

raulicBrakeFluid.Thislubricationresults

eHare.LoosenclampingnutsonKMJ-1885

ngin channelofthedieuntil itbears

6.

byhandand placefixtureinabench

ampingnutsfirmlywitha wrenchand

e. Thetubingisnowfirmlygrippedi n

lare-formingoperation.

toolhavingthe concavedie,insert

kefirmblows,withahammer,untilshoul-

pofthedie.Fig.77.

toolhaving45-degreedieat itslower

strikefirmblows,witha hammer,until

opofthe dieFig.78.

tubing

sitionand attachfittingnutsto

econnections.Attachlinetoframe

usingclip,bolt,lockwasherandnut.

ethatline isnotcrushedor bent

flowofhydraulicfluidandprevent

es.

ftfrontandrearwardrear wheels

heelcylinder,usinggasketbetween


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

elcylinder.Tightenhosesecurelyto

ks.Passoppositeendofhose

p.Placesealwasherandrubber seal

onnectionandinsertend ofhose

ndframe.Installflatwasher,lock-

nnectionandtightennut securely.

ghtening.Attachhydrauliclineto

adingline nutinsideofflexiblehose

ecurelytoeliminatepossibilityof

ghtfrontandforwardrear wheels

heelcylinder,usinggasketbetween

elcylinder.Tightenhosesecurelyto

ks.Passoppositeendofhose through

ealwasherandrubber sealover

ectionandinsertendof hoseconnec-

e.Install flatwasher,lockwasher

nandtightennut securely.Donot

g.Insertcapscrewthroughtee

seconnection,usinggasketunder

enteeandconnection.Tightencap

epossibilityofleaks.

TMENT

dbrakebandhas beeninstalled,or

indicatesthatliningtodrumclearance

entcenterforwardfloorboardby

gfloorboardtosupports.Sethand


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7/27/2019 TM 9-802 GMC DUKW-353


dpositionby movingleverasfar

anchorscrewslot.Turnanchor

ain.010"-.015"clearancebetween

gauge asshownFig.79.Thread

chorbracketandslotin anchor

preventanchorscrewturning.

gscrew.Usescrewdriverinslotted

reventscrewturning,whileadjust-

020"clearancebetweenliningand

Tightenlocknutwhenproperad-

ed.

dof adjusterbolt.Turnadjusting

cebetweenlininganddrumas shown

whenproperadjustmenthasbeen

vispinattachingadjustableyoketo

ableyokelocknut.Turnyokeas

n yokeandcamlevers.Attachad-


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

susingclevispin andcotterpin.

cknut.Installforwardcenterfloor

rtswithscrews.

ANDDRUMREPLACEMENT

ndwith liningarelocatedatrear of

withlining,or drum,canbereplacedwith-

ofotherunit.

ocedure(Fig.82)

entcenterforwardfloorboardby

gfloorboardtosupports.Remove

ttachingspacerlinksto brakesup-

knutandadjustingnut fromlower

washer,flatwasherandcompression

dfromlowerend ofadjustingbolt.

oreleasespringsandcamshoeare

nchorscrew

onutsfromlocatingscrewso that

removed.Usepliersto cutanchor

anchorscrewfromanchorandband

g

mblymustnowbe pulledtoward

support.Whenbandhas beenre-

ngcanalsoberemoved.

inleft-handsupportwhilebrake

sbeing movedforwardandover

ngscrews

ughbandanchorandintosupport

nlytemporarilyinstalledatthistime.

ghholesinbrakebandlower bracket

threadtwonutsonlocatingscrew.

ngbolt.Passthreadedend ofad-

oughbandupperbracket,upperre-

erreleasespringandband lower


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7/27/2019 TM 9-802 GMC DUKW-353


ver,Mountings,Linkage,Bandand

on

onspring,flatwasherandadjusting

stingbolt.

deof spacereyeandattachwith

nkstoadjustingbolteye andcam

throughspacerlinks, camlevers


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

tallcotterpin ineachclevispineye.

clearanceasdirectedin Para.103b.

boardandattachto supportswith

ocedure

entcenterforwardfloorboardbyre-

floorboardtosupports.

tuniversaljointanddrum

atrearoftransfercaseas directed

annowbe movedtorearandcom-

Procedure

shaft

bothsidesof drum.Placedruminits

ningandpush forwardagainstuni-

umto lineupboltholesand push

nstallpropellershaft asdirectedin

adjustmentasdirectedin Para.

erfloorboardandattachto supports

ANDLINKAGEREPLACEMENT

ntrolrod tobrakebandcanbere-

mountingbrackets.Whennecessaryto

tisofcoursenecessarythatlever bere-

ndhandlever

mpartmentfloorboards.Removecot-

achingpullrodtohand brakelever

oveboltnutsattachingsectorto

sectorandleverassemblyfromsup-

tattachingright-handlevertocross

removefromleverandsupport

ndleverfromcrossshaftbyremoving

asher.

handsupportbrackets

andlockwashersattachingleft-hand


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7/27/2019 TM 9-802 GMC DUKW-353


ettotransmission.Liftbracketup

movetwocapscrewsandlockwashers,

tachingright-handcrossshaftsup-

on.Removebracketfromstudand

y.

andsupportbrackets

ositionwithstudthroughlower hole.

asher,alsotwocapscrewsandlock-

wsandstudnut.Placesupport

wardedgeofbracketbetween

albracket.Installthreecapscrews

capscrewssecurely.

centers)onshaftusingWoodruff

t andlockwasher.Placeshaft

dsupportbrackets.Installright-

ters)onshaftusing Woodruffkey

d lockwasher.

semblytoleft-handsupportbracket

kwashers.Spacersareusedover

cketandsector.

ins toattachshortpullrod between

sshaftleft-handlever.Attachbrake

ftright-handleverusingclevispin

od asdirectedinPara.103b.In-

tmentfloorboards.

etbrakelinings

eaction.

hicleminimize

uldcausebrakes

edtooclose.


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7/27/2019 TM 9-802 GMC DUKW-353


andinspection109

r110

cementI11

ment112

ousingreplacement113

ION

cleissingleplate,drydisc typewith

ragmtypepressurespring.Clutchrelease

tchpedal,releasefork,andreleasebearing.

nshaftand isconnectedtoreleasefork

nFig.83. Releaseforkisballstud

.Innerendoffork engagesgrooveinre-

ofreleasebearing.Releasebearingisof

atedatassemblyanddoesnotrequire fur-

tthelifeofthe bearing.

oil-sealedtypewhichfitsinrecess

sapilotfor clutchshaftoftransmission.

ononlywhenclutchis removedfrom

tedin Fig.84whichshowsrelative

tchis"engaged"and"disengaged."Note

hdisciscontactingfaceofflywheel,being

byclutchpressureplate—which,inturn,

bypressureexerteduponit bythedia-

hinthis engagedposition,engineand

ed.Pressingdownonclutchpedaldisen-

gconnectionbetweenengineandtransmis-

G

aximumefficiencyandlonglifeand

peratingdifficultyshouldbeencountered.

wever,andmustbecompensatedfor,and

funsatisfactoryoperationmaybedeter-

following.


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

auseRemedyParagraph

oose

glever111

s-

Ill

ENANCEANDINSPECTION


sindicated,shouldbeaccomplishedon

ventivemaintenanceoperationisto

kagetocompensatefornormalwearof

dureisexplainedinPara.110.

INGWEAR

earisaccomplishedbyregulatingthe

altravel.Thisamountoftravel isthedis-

beforecausingreleasebearingtocontact

g.Asfacingswear,fingersofdiaphragm

sebearing,thusreducingclearanceatthis

elesseningclutchpedaltravel.

AdjustmentProcedure.(Referto

river'scompartment

ardindriver'scompartment.

tinglinkatreleaselever. Turnad-

yberequired,to obtain21/2"free

clutchstartsto release.Freepedal

withfingeronpedaland notwith

ery sensitive.With21/2"pedalfree

ed,turnupchecknutfirmlyagainst

justmentfromcomingloose.

MREPLACEMENT

ndreleaseforkmaybereplacedwith-

nits.Howeverreleasebearingcannotbe

issionisremoved.

rocedure

randtoeboard

dtoeboard.

trollinkage

at clutchoperatingleverbyremov-


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7/27/2019 TM 9-802 GMC DUKW-353


dLinkage

rodandoperatingleverbyremoving

ofpedalrod.Removehairpin lockat

moveclutchoperatinglever.

Procedure

haft

eroverendofshaft.Installhair pin

theninsertpedalrodin holeatend

urewithnut andcotterpin.

inktooperatingleverusingclevis

eckpedalfree travelandadjustas

etravelisnot2'/;>".


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

sengagedPositions

movalProcedure

gunderpan

ewswhichattachclutchhousingun-

nd removepan.

eforkandballstudassembly

eforkfromclutchlinkagebyremoving

ustinglink.Loosenandremovere-

er sideofclutchhousing,usinga

h.Disconnectclutchpullbackspring

oveforkandball studassemblyfrom

dretainerspringout offorkand

nProcedure

highmeltingpointlubricantas

brication"andinstallballstudand

place endsofballretainerspring

illbe completelyseatedingrooves


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7/27/2019 TM 9-802 GMC DUKW-353


ud assemblyinclutchhousing

ssembly,usingcaretoseethat

kareingrooveofreleasebearing

dinto supportandmakesureball

nup tightly.

nkage(Fig.83)

inglinktoreleasefork,usingad-

lbackspring.Adjustclutchpedal

Para.110, andinstallchecknut.

alProcedure

irectedinPara.279.

gandsupportassembly

pportassemblyfromhardenedbut-

sebearingshouldnotbe removed

temsare notservicedseparately.

tionProcedure

rooveinbearingsupport

fhighmeltingpoint lubricant(see

orspecifications)toreleasefork

upportassemblybutdo notlubricate

prelubricatedatassembly.

ndsupport assembly

portinreleaseforkmakingsure that

fforkenter grooveinsupport.Line

h splinesinclutchdrivendischub

directedin Para.279.

GREPLACEMENT

etractingspringscanbeaccomplished

ssemblyfromvehicleinthefollowing

ovalProcedure

ndunderpan

ver'scompartment.Remove4cross

attachclutchunderpantoclutch

ngs

ctingspringisvisibleand remove

tingspringtopressureplateand re-

n Fig.85.Repeatthisoperation

ingsare removed.


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

ings

ationProcedure

holeincoverasillustrated inFig.

plate,usingspecialboltandshake

tBearing


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7/27/2019 TM 9-802 GMC DUKW-353


eRun-OutandSquarenessofClutch

clutchunderpantoclutchhousing,

crewsand lockwashers.

RINGANDHOUSINGREPLACE-

edfromenginewithoutfirstremoving

clutchortransmissiondoesnotnecessitate

hicle;however,thetwolowertransmission

boltsareaccessibleonlyfrominside of

hhousinglowerpanisremovedandmaxi-

andefficiencyoftheworktobeperformed

epowerplantis removedfromvehicle.

transmissiononlyareoutlinedin Para.

valofcompletepowerplantarecontained

overthereplacementofclutch,pilot

g;however,clutchhousingreplacement

nlessproperfacilitiesfor checkingalign-

eelareavailable.

ure

irectedinPara.279.

ndballstud assembly

eforkfromclutchlinkagebyremov-

djustinglink.Loosenand remove

nner sideofclutchhousing,using


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

tBearing

ch.Disconnectclutchpullbackspring

oveforkandball studassemblyfrom

ctsizeor ClutchAligningArbor

ubandloosen thenineclutchcover

timeuntildiaphragmspringpressure

pletelyremoveallmountingbolts,

dlowerclutchassembly.

rocedure

bly

asdirectedinPara.113c.

KM-J-164asillustratedin Fig.86

emovepilot bearing.Adjustpuller

ersonpuller areclosed.Insert

aringas farasitwill go.Tighten

gersofpuller behindbearingand

ststopnuton pullershaftseveral

alProcedure

haftandbrackets

dinPara.138.Removepinwhich

trolbellcranktocrossshaftbracket

connectoilpressuregaugelineat

enut.Removetwoboltsateach

movecrossshaftandbrackets.


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7/27/2019 TM 9-802 GMC DUKW-353


hAssembly

g

uumlineatmanifoldand remove

housinginspectionholecoverbolt.

screwswhichattachextensionplate

nd sixboltswhichattachhousingto

g.

onProcedure

e

sandboltclutchhousingto engine

shersundertheheadsofthesix

tensionplatetofrontofhousing

ews.

ole

tingbracket(toolKM-J-1895)to

ountingboltasillustratedin Figure

ertipso thatitisin contactwithin-

otateflywheelandnote readingon

ceeds.010"housingmustbere-

arfaceofhousing

kingrun-outofpilotholeexceptthat

stbe restingonmachinesurfaceof

"fromedgeofpilothole.-Ifreading

ustbereplaced.


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

gArbor

terlinkage

Para.138.Attachstartercross

olts ateachbracket.Installaccelera-

ft-handbracketandreplacecotter

cuumlinetomanifoldandattach line

pectioncoverbolt.

Procedure

edto providecorrectbearinginstalla-

led,it mustbeinexactalignment

using.Usepilotbearingdriver

ig.88 toinstallbearing.

aring

racesbeforeinstallingbearing.

ation,"forproperlubricant. Posi-

er.Placetoolandbearingin pilot

movehandleforwarduntilbearing

nkshaft(Fig.88).Tapendofhandle

bearingisproperlyseated.

dure.TheuseofClutch Aligning

endedtoproperlycenterclutch discdur-

ver.

heel

orhandcrank ifengineisout of

ywheelis visiblefromunderside

pressureplateassemblyagainstfly-

il"X"markon cover(showninFig.

konflywheel.InsertClutch Align-


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7/27/2019 TM 9-802 GMC DUKW-353


0)in clutchdiscandinstallbolts

heel.Eachboltshouldbetightened

,topreventdistortionofcoveras

.

rkandlinkage

ageas directedinPara.llle.

nedinPara.279.


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7/27/2019 TM 9-802 GMC DUKW-353


andinspection117

gandrefilling118

119

120

1

122

123

cement124

ION

oolingsystemare:radiator,overflow

ostat,thermostatby-pass,temperaturein-

recontroltube,fillercapsandthetubes

diatorwithengineandwaterpump.These

enpropermaintenance,toautomatically

emperature.

frombottomof radiatorbyaction

e-circulatedthroughpassagesandwater

ned,throughupperconnections,toradi-

actionoffanblowingairthrough radiator

hintakegrille,locatedjust torearof

or,forcesairthroughshroudandradiator

tsandoutairexhaustgrille. Air,for

arpaulininstalledistakenin through

oFig.91.

wtankisprovidedtotakesurgeof

ntoradiatoruppertank wheneverve-

enstoporengineis suddenlyaccelerated.

atrestrictsflowthroughradiator

maloperatingtemperatureofengine.

yopensingradualstages,beginningatap-

ostatisfullyopenedatapproximately185°.

ndthermostatandradiatorto allowcir-

roughoutengineandwaterpumpwhen-

Temperatureindicatorisdriver'sguideto


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7/27/2019 TM 9-802 GMC DUKW-353


culation

gsystem.Itprovidesconstantindication

psare providedinsystem,acon-

diatoranda pressuretypecapatoverflow

angethepositionofthesecaps.Pressure

owtank.Radiatorcapis aconventional

be keptinplacewhenvehicleisin opera-

ap(Fig.92)."Thiscapincorporates

hmaintainsapressureof 314to414

whenenginehasreachednormaloperat-

easeinpressureraisesboiling pointof

aslightly higheroperatingtemperature

engineperformanceandeconomywith-

ting.

G

ause

ming

osed.

e.

d.

.

0

2

3

8


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ON,6x6

auseRemedyParagraph

pen.Replacethermostat...122

tions.Tightenallconnections;

Replacepump123

Replacecore121

ENANCEANDINSPECTION

eoperationsasitemizedinSectionV

tintervalsindicated.

ventivemaintenanceareitemized

120 ofthissection.

G,FLUSHINGANDREFILLING

ystemshouldbecleanedatleast

tenifinspectionrevealsunusualaccumu-

is serviceshouldalwaysbeperformed

-freezesolution.Wherevercoolingsystem

ed,besureradiator,overflowtankandcyl-

eedraincocksareprovidedfor thispur-

nd notrefilledimmediately,asuitable

waterin coolingsystem"andattachedto

menthatchcover

enthatchcoverhold-downboltwing

,securingitin raisedpositionwith

diatorandoverflowtankfillercaps.

dcylinderblock

aincock,locatedatbottomoftank,

ock,locatedatleftrearside of

nthatchcover

thatchcoverhold-downboltwing

.Removesnappluglocatedatupper

ompartmentbulkhead(between

ewradiatordrain cock.

rocedure

to stiruplooserust, thendrain


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7/27/2019 TM 9-802 GMC DUKW-353


kCap

a.118b.Closeradiator,overflow

aincocks.

andrefillsystem

oradiatorand fillsystemwith

eaneristobe used,followcleaner

nsforcleaningandneutralizingsys-

ven inthisparagraph.)Replace

kfillercaps.

nto approximately180° butdonot

rcoreif necessarytoattain180°).

east 30minutes.Stopengineand

ughlydrainsystem.Closedraincocks

nstallingfiller caps.Runengine

systemagain.Refill systemas

:Inthe eventpressureflushingis

recautionsmustbetaken:

describedinPara.122.Flushradia-

rately—flushradiatorfirsttoallowengine

fillercapisin place.Loosenhoseclamp

rinlet hose.Loosenhoseclampandopen

nnectionhose.Attachpressuregunto

waterouttop.Useradiatorhose toattach

waterfromradiator.Attachpressuregun

ononengine,forcingwateroutradiatorto

ollowinstructionsofflushinggunmanu-

veprecautions.


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TON,6x6

ment

efill

ndinstallsnapplug inbowcom-

ebowcompartmenthatchcoverand

nboltwingnuts.Closeoverflowtank

ocksandfillcoolingsystemthrough

n:Useclean,softwater.Avoiduse

li,orother substancesthatpromote

andrust.Donot usesaltwater.

closeenginecompartmenthatchcover.

flowtankfillercaps—Sealingcapon

onoverflowtank.Thisis important

lingsystem.Closeenginecompart-

ure.

EPARATIONS

aingreatestefficiencyandcarefree

gcoldweather,asystematicinspection

uchasoutlinedinPara.118 shouldbedili-

mustbeprotectedagainstfreezing

natmospherictemperaturebelow32°F.

pesof anti-freezecommerciallyavailable

areanti-freezesolutionssatisfactorilyfor

sesubstancesarecommonlyknownas

nol(syntheticVoodalcohol)andethylene


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7/27/2019 TM 9-802 GMC DUKW-353


Alcoholandmethanolaresubjectto

erequirefrequenttestingandaddingof

ectionforthelowestanticipatedtempera-

neglycolrequiresaverywellmain-

sedina leakproofsystem,usuallyno

erequired.Duetoits highboilingpoint,

oration.

ts.Solutionscontainingsalt,mag-

licate,kerosene,orotheroils,arenot

ngsystem.

e

tion,thecoolingsolutionmustbe

minestrengthofanti-freeze.Atest-

n strictaccordancewithinstruc-

ufacturerfortestingparticulartype

usedifferenttypes ofanti-freezein

Followingchartlistscorrectamount

etobe used.

m

mbecomesfrozenanda heated

dcoveragainstcoreand rur

isthawedout.If coolingsolutior

cevehicleinaheatedgarageuntil ice

nd,undernocircumstancesshould

scondition.

TENANCE

cedure.Fanismountedtowater

y beltfromcrankshaftinconnectionwith


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ptatproper tensioninordertoobtain

dtoobtainmaximumlifeof belt.Fanand

henginecompartmenthatchcoveropening.

nting

ountingbracketboltnutsandthen

ngarmbolt.

rawayfromengineasnecessaryto

.Alightpressureon beltata point

aftandwaterpumppulleymust

onasshownin Fig.93.Donotadjust

eratortoadjusting armboltandthen

ountingbracketboltnuts.

dure«

nting

ountingbracketboltnutsandthen

ngarmbolt.Movegeneratorto-

illgo.Removebeltfromgenerator

andcrankshaftpulley,thenremove

cedure

desand placeoverwaterpump,

rpulleys.RefertoPara.a.foradjust-

earancebetweenbladesandshroud.

edure

erpumpbolts andremovefanand

der.

MENT

. Radiator,fanshroudandover-

movedthroughenginecompartment

pendentlyofeachother.Radiatortoside

ethroughbowcompartmenthatchcover.

Para.118.

ections

lowerconnectionhoseclampscrews

erhosesfromradiator,also dis-

owtankpipeattankdrain cock.Re-

wpipeclipscrewsandremoveclips.


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7/27/2019 TM 9-802 GMC DUKW-353


lation

Water

allation

nt,removesix(3eachside)radiator

andlockwashersandremovebolts.

ndremovefromvehiclethrough

chcoveropening.Takeparticularno-

pportseal isnotlost.

cedure

diator upperandlowerfelts,also

al,arein goodconditionandin

ry.

ountingflangesintowardradiator

sto clearsidesupports,andcare-

sition.Frombowcompartment

diatortosidesupportbolts,lock-

tradiatoroverflowpipetooverflow

clipsand screws.Alsoinstallupper

estoradiatorandtightenfour clamp

Para.118.


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ocedure

dtolowershroudbolt nutsandlock-

.Removeeightshroudtosidesupport

andremovebolts.Removeupper

emovelowershroud.Donotlose two

Procedure

torfeltin positionandinstall

oside supportbyfourbolts,lock-

ppershroudtoradiator feltinposi-

d,securingit tosidesupportby

dnuts.Alsoinstallfourupper to

ashersandnuts.

Procedure

ect

pandunscrewtankdraincockto

htbein tank.Disconnectradiator

cock.Removefourtanktoside sup-

shersandremovebolt.Removetank

onProcedure

e supportandinstallfourtankto

sandnuts.Connectradiatoroverflow

placetankfillercap.This isthe

CEMENT

statislocatedatcylinderhead

ntsorrepairscanbe madeonthermostat

systemindicatesunitas unsatisfactory,

menthatchcoverhold-downbolt

over.Removesnapplugin bow

ndunscrewradiatordraincockand

enginecompartmenthatchcover

ndopenhatchcover,securingit in

pchain.

nectionhoseclampscrewsandre-

athousing.Removetwothermostat


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7/27/2019 TM 9-802 GMC DUKW-353


nnectionboltsandremovethermo-

ostatunitfromwateroutletconnec-

ontainerof waterthatmaybe

meter(onethatwill registeratleast

temperatureofwaterwillbeindicated.

ndwatchoperationofthermostat.

openatapproximately160° andbefully

185°.Intheeventoperationofthermostat

anduseoneknownto operateproperly.

onincylinderheadwateroutlet

ermostathousingtooutletconnection

mblethermostathousingtooutlet

ermostathousingtooutletconnection

semblingwatertemperaturecontrol

ectionhoseoverthermostathous-

ampscrewssecurely.

installsnapplugin bulkheadand

atchcover,securingitwithhold-

or.Closeenginecompartmenthatch

-downbolts.

CEMENT

rocedure.Waterpumpmaybere-

ughenginecompartmenthatchcover

Para.118.

Para.120.Removefourfantowater

ovefanand spacer.

erpumphoseclampscrews,a1

hosefromwaterpump,Loosentwc

pscrewsandremovehosefromby-pass

mptocylinderblockboltsandre


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

hicle.Donotloosewaterpumpto cyl-

Procedure

ne

cylinderblockgasketin position,

ositionon engine.••

asherinwaterpumpbolt holejust

enfingertight.Then installre-

ckwashers,assemblingfuelandoil

ustingarm.Tightenall fourbolts

totee andtightenhoseclamp

waterpumphoseto waterpumpinlet

rews.

itionon waterpumpandinstall

.FollowproceduregiveninPara.

Para.118.

GEREPLACEMENT

auge,capillarytubeandthermal

sembly.Noprovisionsare madetorepair

ugefunctionsimproperly,replaceunit.

e.FollowinstructionsgiveninPara.


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7/27/2019 TM 9-802 GMC DUKW-353


RING

andinspection126

vehicleis6-volt;with wiresade-

us"tracer"colors(Fig.96),and

cal,inwiringindividualharnesses.Con-

blocks,terminals,andinstrumentsare

essary,foraccessibilityandaccuracywhen

tion.

hegeneralcareand maintenanceof

ditionto generalwiringinstructions,

ccomplishageneraltune-upofsystem

sedin variousotherelectricalsystems

dualsectionsas follows:

s


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


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7/27/2019 TM 9-802 GMC DUKW-353


RING

Diagram

nessY

BB

rness

GG

h

Harness

terHarness

Lamp

andTail

mp

CEANDINSPECTION

minalsandconnectionsatjunctions

tedregularly.Theseconnectionsmustbe

mes. Bearinmind:acleanand tight

oodconnection.

deina line,soldermustbeusedto

tapeshouldbe usedprofuselytoprotect

amineandtightenallharnessclips


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

6RAPD16145

nelWiringConnections

T

S

ker

stemis ofaspecificsize.Insulation

tivecolororpatternof colorstoaidin

scircuits.Chart,Fig.96,illustrates

illustrates,ina schematicmanner,

itsthroughoutvehicleelectricalsystem.

cuitcanbereadilymade withconven-

estequipmentofanyelectricalunitor

sfollowedaccurately,apoint-to-point

rcuittoestablishcircuitcontinuity.

sareusedonvehicles,as illustrated

scontainwiresto variousunitsand

essmayberemovedasanassemblyfrom

esarewellinsulatedwithheavyloom,and


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7/27/2019 TM 9-802 GMC DUKW-353


RING

ersandJunctionBlockConnections

ness

Tr.

ckCr.Tr.

ndFilterHarness

kCr.Tr.

kCr.Tr.

ndStarterHar-

witchHarness

eachharnessarelistedin Figs.101through

egulatorConnections.Figs.99and

atinstrumentpanel,andatregulator.

heseconnectionswillbefoundin Section

pectively.

ss(Fig.101).Thisharnessextends

ghtoeboardandto instrumentpanel.

Starter Harness(Fig.102).This


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

anelWiringHarness

l

n

w.

Dash Lamp

DashLamp

Dash Lamp

OSw.

Sw"S"

htSw.'B51'

ghtSw.'Si-

"

d

Sw.

.Sw.

r.

ck,

3


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7/27/2019 TM 9-802 GMC DUKW-353


RING

andStarterHarnesses

CK

kCr.Tr.

kCr.Tr.

LANDSTARTER

ndFilterHarness(Fig. 105).This

tor,atleftsideofengine,withregulator

andengineroombulkhead.

ness(Fig.106).Thisharnessextends

ghbulkheadandrearwardalongunder

andunderreardeckto stopandtaillamps.

UP

eorderlyprocessofcheckingvehicle

termineifitis functioningproperly.In

rnequipmenttonewconditionso that

isrestored.Acomprehensiveanalysisof

ludechecksonbattery,startingmotor,

ibutor,coil,sparkplugs,andallwiring.

detoall otherElectricalSystemsec-

tructionsasitemizedaccomplished.

ktoStopSwitchWiringHarness


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ringHarness

minal

r 4

kCr.Tr.

..HighBeam

Beam

kout

..HighBeam

Beam

MENT

gharnesses,usedonthis vehicle,are

allyinFig.98.Individualharnessesare

ugh106.

wiresizeandcolor,alsojunctions,

nessillustrations.Whenremovinghar-

meachunitterminalorjunction,as shown

RegulatorandfilterWiringHarness

d

Cr.Tr... .Filter

r.Tr.


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7/27/2019 TM 9-802 GMC DUKW-353


IRING

ampWiringHarness

inal

nal

ector

onnector

ns.Removeclipsattachingharnessto

Whenwiresandclipshavebeenremoved

sscanbecompletelyremovedasanassem-

nessinits correctlocation,being

hgrommetsatbulkheads.Installclips

orts,bulkheads,etc.Fig.98showsap-

psandgrommets.Selectwiresizeand

vidualharnesses,andattachtounit ter-

ed.Tightenallterminalssecurely.Bear

electricalconnectionisagoodconnection.


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ARTINGMOTORANDBATTERY

andinspection133

nt137

nt138

agereplacement139

ION

sofbattery,startingmotor,control

ngcablesbetweenbatteryandstarting

tachedtoright-handsideof clutchhous-

nover-runningclutchdrivewhichis

gementwithflywheel.Startingmotor

tartingmotor,completeselectricalcir-

tartingmotor,whenstarteris being

eandislocatedatright sideofengine.

batteryisused primarilytosupplycur-

gmotor.The batteryconsistsofthree

ivingaterminalvoltageof sixvolts.Each

proofcompartmentinwhichtwogroupsof

ve,areimmersedinelectrolyte,asolution

r.

eryareconnectedtoeachother by

ontrolledbyfootpedal,whichopensand

actpoints,therebycontrollingelectrical

dstartingmotor.

.Whenstarterpedal buttonisde-

tofshiftleverpushesdriveunit rearward

hflywheelringgear teeth.Upperendof

gswitchbuttonafterpinionhas fully

whenspringissufficientlycompressedto

oon asarmaturerotates.Whenenginehas

ningclutchonstartingmotorshaftre-

ywheelteeth.


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orInstallation

river,spring onstartershaftandreturn

verreturnsstarting mechanismtooff

ectro-chemicaldeviceforstoring

nproperlyused,hastwomajorfunctions.

ern,directlyorindirectly,thevoltageof

m.Thesecondfunctionistoprovideelectrical

ndignitioncircuitwhile engineisbeing

iesenergy,underlimitedconditions,to

ccessories.

G

esymptomsinstartingmotorsystems,

nintoconsideration.Theseare(1) condi-

nofcableand terminals,orcontinuityof

chanicalandelectricalconditionofstart-

terrepeatedandsatisfactoryopera-

seoffailure ofenginetostartcannotbe

rsystem,butto otherfunctioningsys-

tion,fuel, etc.Referenceshouldbemade

g"tablesinthismanualtodeterminecause


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ON,6x6

e

ause

ch

es

or

bly

dbattery

t-

ed

36

38

38

38

38

38

38

ator

ust-

36

38

38

38

38


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.Importanceofproperlymaintainingbat-

asizedasthecompletestartingsystemwill

ercondition.

ountingboltstobe suretheyare

dinspectconditionofcommutatorand

stripofnumber00 sandpaperbetween

ilearmatureisrevolving.Ifthis failsto

commutatorisbadlyworn,startingmotor

polishingoperation,dustshouldbeblown

dinspectconditionofbrushes.Ifap-

startingmotorshouldbereplacedas di-

y,tightenscrewsattachingstarter

using.

y,tightenterminalstudnutattaching

soammetertoswitchwire.

videntthatcontactpointsarenot

eplacedasdirectedinPara.137.

ACE

madeof startingmotorcircuitat

ineconditionofvariousunits.Symptoms

rtingsystemdifficultiesareoutlinedin

unitssuchasgeneratorandregulatorare

actorstobatteryfailure.Therefore,ref-

madetotrouble-shootingchartscovering

move3fillercapsandchecklevelof

velshouldbe approximately%"abovecell

erwatershouldonlybeaddedjust before

waterwhennecessarytoadd.

s.Inspectconditionofbatteryter-

orroded,removeandcleanwithsolutionof

cableterminalsandbatterypostwith

alonpostandtightenclampnut securely.

atereadinghydrometerandcheck

cificgravityofbatterysolution.Full

stbetween1.260and1.300.Ifreadingis

dbereplaced.Freezingpointofelectrolyte

vityorconditionof batterycharge.Fol-

temperatureofbatterysolutionatvarious


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ewithStartingMotor

SpecificGravity

nition switchofforhightension

ncoil,operatestartingmotorandquickly

withAEE-F8lowreadingvoltmeterin

If voltagefallsbelow1.7voltsat80°F.or

weencellreadingsofmorethan1/10volt,

uldbereplaced.

onnectionstodetermineiftheyare in

cessiveresistance.Excessiveresistance

gedropwhichmaylowervoltageatstarting

thatnormaloperationofstartingmotor

malvoltagedropcanbe detectedwitha

tifyOrdnanceMaintenancePersonnel.

ENT

essarytoremovebatterywheninspec-

mustbereplacedor recharged.

wsandliftengineroomhatchcover.


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dhatchcoveropen.Loosenpositive

boltnutsandlift cableterminalsfrom

dinguppertrayovertop ofbattery.

y.Usebatterylifter strapandraise

onottip batteryduringremovalas

lledfrombattery.

hcellas directedinPara.134.Use

nalsand lowerbatteryintoplace

minalofbatterymustbe toward

erbatterywith rodsateachend

l wingnutoneachstudand tighten

batteryandcableterminals.Install

estobatteryterminalsandtighten

egrounded).Coatterminalswith

rosion.Lowerhatchcoverandtighten

ghatchcoverinplace.

EPLACEMENT

hold-downboltsandl iftengineroom

upchaintoholdhatchcoveropen.

rminalnut,twocablesandcondenser

ofbattery cabletopreventdischarge

omein contactwithmetal.

ndenser

ockwashersattachingswitchtostart-

vecondenserandstarterswitch.

enser

asherstoattachstarterswitchand

orhousing.Tightenscrewssecurely.

terycable,andcondenserpigtail

minal.Replacelockwasherandnut.

ovehold-upchainandlowerhatch

nutsonhold-downboltsholding


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ON,6x6

EPLACEMENT

emovedto lubricateinboardbearing

e

cover


upchaintoholdhatchcoveropen.

tedinPara.200. Removebattery

cidentaldischargeofbattery.Re-

attachingammeter,batteryandcon-

itchterminalandremovecables.

ring.Removecotterpin,returnspring

glinkagerodto shiftlever.Remove

hersattachingstartingmotorto

otorcannowbemovedforwardto

ure.

correctpositionwithstarter switch

ockwasherandcapscrewalsolock-

startertoclutchhousing.Tighten

ndalternatelyuntiltight.

bles

inkagerodto shiftleverandinstall

rpin. Attachreturnspringtoclip

tachammeter,batteryandcon-

itchstudand installlockwasherand

Attachgroundcableatbatteryand

elfilterasdirectedin Para.200.Re-

werhatch.Tightenthreewingnutson

atchinplace.

ONTROLLINKAGEREPLACEMENT

trollinkageisonlynecessarywhen

or'otherwisedamaged.


intoholdhatchopen.Disconnectre-

vecotterpinspringclipandclevis

rtershiftlever.Removecotterpin

nelrodto crossshaft.Pedalcannow

rd.Removefourcapscrews(two


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7/27/2019 TM 9-802 GMC DUKW-353



gebracketstotopofclutchhousing.

wbecompletelyremoved.

e

usingandreplacefourcap screws

glinkagebracketstoclutchhousing.

e boardandattachtolinkageusing

tachlinkagerod tostartershift

llspring clipoverclevispinand

turnspringto clipandlinkagecross

ainandlowerhatch.Tightenthree

ltsholdinghatchin place.


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7/27/2019 TM 9-802 GMC DUKW-353


ITION

andinspection143

44

46

maintenance147

48

cement149

50

ION

esignitionswitch,sourceofelectrical

tor),ignitioncoil,condenser,distributor,

,andspark plugs.Allofthesefactors

ricalenergyofsufficientlyhighvoltageto

combustionchambers.

tormountedonright-handsideof

ntrifugaltypeofsparkcontrol.The unit

spiralcut gears.Lowerendofdistribu-

ngagesslotonupperendof oilpumpshaft

.109.)

is oil-filledandhermeticallysealed

sture.Hightensionterminalis protected

ichhashigh resistancetoleakageacross

agedbyelectricalleakagewhichmight

coilisto transformenergyfromlowvolt-

erator)intoenergyat sufficientlyhigh

arkplug.

sarethe mediumbywhichhigh

edintoasparkin combustionchamberof

serismountedinbodyofdistributor

stributorpoints.Thepurposeofcondenser

t arcbyitsabilityor capacitytostoreup

re.Lowtensionwires arethose

ehightension wiresarethoseinsecond-

ndenser,ignitioncoilandsparkplugs


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7/27/2019 TM 9-802 GMC DUKW-353


ITION

tallation

lowtensionwiring toformtheignition

chanicalunitdesignedtoassistin

getosecondaryvoltage(pointmecha-

tagecurrentin correctsequencetospark

o varysparkautomaticallytoprovide

ne(centrifugalcontrol).

poftwowindingsor circuits—primary

tactpointsindistributorclose,currentfrom

throughprimarycircuit,creatingamag-

sandcore.Whendistributorpointsopen,

oesnotstop flowinginstantlybutflows

nnectedinparallelwithpoints.Condenser

pseofmagneticfieldwhichinducesavoltage

condarywindings.Thisvoltageincreases

oproduceasparkat sparkplug.

gs areused,oneforeachengine

ocombustionchamber.Plugsarecon-

ulatedcableswhichcarrysecondarycur-


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ON,6x6

6163

onSystemCircuits

ondenseristoreducedistributor

apacitytostoreupelectricalenergyuntil

butorpoints.

G

nitionsystemtrouble,themechanic

ringdiagramandkeepin mindfunda-

nitioncircuits,primaryandsecondary.

ermustalsobearin mindsymptomsusually

tioncircuitsare insomeinstancesocca-

engineoperatingsystems.

msthatcanbe visuallyandaudibly

pointtodefectsinignitionsystems;how-

ngsystemsshouldhaveroutinechecks

onsystemisat fault.SeePara.177for

."

ssymptoms,causesandprobablereme-

experiencedwithignitionsystem.

ause

eating

eCorrect146

butor

—underload

p

n

nt


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ITION

ibutorCapSocket

auseRemedyParagraph

eplace149

gsReplace146

rloadorhigh speed

nceAdjust145

ENANCEANDINSPECTION

ouldnotonly beinspectedatregular

maintenanceoperationsshouldbeper-

keepsystemoperatingefficiently.Only

pectionofvarious unitsandaccomplish-

nanceandadjustmentscanignitionsys-

mefficiently.

eincludesoperationsondistributor,

s,andwires.Detailedinstructionson

tsaredescribedunderrespectivepara-

TENANCE

eproceduresembracecleaningandin-

pointadjustment,andadjustingtiming.

stributorcapshouldbe removedand

andout.Inspectthoroughlyforanypres-

,roundbrushto thoroughlycleanwire

.111.

pandrotor

verasdirectedinPara.172.Remove

grillebehinddriver'sseat.Place

ed,thenengagewaterpropeller.Do

Use crankingbaronpropellershf


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ON,6x6

thCapandRotorRemoved

ributorbreakerleverfibre ison

stributorshaftcams.Disengage

urneccentricscrewuntilpointopen-

Tightenclampscrewandagain

besure ithasnotbeenchangeddur-

orandcap

ndcap.

ver

asdirectedin Para.172.

rgrille

e.

nitiontimingcannotbeover-empha-

ofvehiclewillbeseriouslyaffectedifigni-

ticularlyignitiontimingis notproperly

rdistributorhasbeenreplacedit is

stemberetimed.Procedureforinitial

grillebehinddriver'sseat.Place

ed,thenengagewaterpropeller.

hon.Usecrankingbaronsprocket

isinfiring position;atthispointnote

ngregisterswith timingmarkon

engagewaterpropeller.

minalon distributorcap.Placecap

usingand markhousinginrela-


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7/27/2019 TM 9-802 GMC DUKW-353


ITION

kingforIgnitionTiming

ocationofNo.1terminalwillbe

ed.

perlocationasdirectedinPara.148.

t(Fig.114)

ntbracketsothatmarkonblockis

anceand"R"retard.Tightencap

ock.

ounterclockwiseuntilpointsare

ockwiseuntilpointsjustbeginto

tomarkonhousing.Tightenbracket

ertimingcheckasdescribedin

Wheneverdistributorhasbeenre-

heckignitiontimingwhendistributoris

ht isrecommendedforthisoperation;

alsobe used.

etmanualcontrolbracketatmid-

g lighttoNo.1 sparkplugterminal

ntground.

tidlingspeed.

kholeinflywheelhousing.Noteposi-

teelball)in relationtopointer.SeeFig.

nterandsteelball)are morethan

gshouldbeadjusted.

114)and turndistributorhousing

pointer.


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ON,6x6

nualAdvanceAdjustment

checktimingagain.

t lamptodistributorprimaryter-

ndotherleadtoconvenientground.

rearof driver'sseat.Placetrans-

enengagewaterpropeller.Usecrank-

sprockettoturnengineover.

lyuntilNo.1 sparkplugisabout

eryslowlyand stopatexactinstanttest

terpropeller.

erinrelationto flywheelmarking.

withinfa"ofsteelball,timingmay becon-

mpbolt(Fig.114)and turndis-

ball indexeswithpointerwhenengine

hecktimingagain.

tiontoautomaticadvancecontrol,

,isprovidedwithwhichinitialsettingmay

fuelused.Bearin mindthatadvancespeci-

aredeterminedaftercarefultest and

efuel.Becauseofvariousgradesoffuel

eadjustmentofinitial settingmaybe

actoryengineperformanceandfuel

gof manualadvanceformaximum

oadtestshouldbe made,usingthe

beusedin service.Engineshouldbe

operatingtemperature.Manualad-

videsmoothengine performancewith


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ITION

rkPlugCables—DistributorCap

hrottleatcomparativelylowvehicle

his settingmayvaryondifferent

estsshouldbe madetodeterminethe

neffortlessengineperformanceand

cessivedegreeof"clatter"or"ping."

ngdistributorclamptocylinderblock.

nderblocktoretardsparkorin oppo-

park.Tightencapscrewandroad

NANCE

sparkplugsisthe firstandprobably

oninmaintainingtheignition system.

gap insparkplugis aPrecision

eatedassuch.Propergap provides.025"

ectrodeandcenterelectrode.Whenregap-

eelectrodeonly—notcenterelectrode.Itis

ap toproperdimension,butallplugs

on.Useastandardroundfeelergauge.

e

cover

verasdirectedinPara.172.

es

ndsuppressorsfromsparkplugs.

henremovingplugs.Ordinary

mageporcelain.

dpluginto cylinderheadwith


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TON,6x6

handtightenplug untilit"bot-

tertoone-halfturnuntil firm.

esurethey areinstalledtocorrect

1-5-3-6-2-4.Besurewires formgood

s,alsoarefullyseatedindistributor

oper methodofinstallingspark

preventwirescontactingignition

ver


IONWIREMAINTENANCE

esbetweencoil,distributorand

edwithinignition shield;therefore,wires

sture.

spectionshouldbemadeofwiring

ceoffailureshouldbereplaced.Wires

kedduetoheatorareoil soakedandswollen

ACEMENT

srevealthat distributorshouldbe

edinfollowingparagraphs.

cover

verasdirectedinPara.172.

ondarywirefromdistributorcap.

eof housingandremoveprimary

reasecupfromhousing.Greasecup

eld.

hatreplacementcanbeinstalledin

mpbracketboltandliftdistributor

enginewhiledistributorisremoved.

at timeofremoval.Insertdistribu-

ocranckcase.Turndistributorshaft

uedendofshaft withoilpumpshaft.

utorhousingshouldbetowardrear

risin correctrunningpositions.It


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7/27/2019 TM 9-802 GMC DUKW-353


ITION

rancebemaintainedbetweenupper

t pointsshowninFig.109.Whendis-

peratingposition,lowerendofhous-

Beforetighteningclampplacefin-

mbon driveshaft.Whileholding

Besuretoequalize clearanceattop

pboltwhiledistributoris heldin

utorhousing.Grease cupislo-

.

odistributorcapin theirproper

o.1wirewhichmustbe infiring

firingposition.Attachprimarywire

butorhousing.

dinPara.145.

ver


OINTREPLACEMENT

cover

nitionshieldcoverisoutlinedin

p

ondarywirefromcap.Removetwo

aptohousingandlift capfrom

utinsidehousingandlift condenser

Removescrewattachingcon^en-

esupport.

nts(Fig.112)

utinsidehousing.Liftbreakerlever

vebreakerpointclampscrewand

oper location,witheccentricscrew

l clampscrewthroughbreakerand

reakerleverover breakerplatestud


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ON,6x6

nderprimaryterminallockwasher.

ampscrew.Adjustcontactpoint

.144.

erlocationandattachbracketto

gcapscrew.Placepig-tailwirebe-

gandinsulator.Tightencapscrew

rely.

e shaftandturnuntilit seatsinto

sitiononhousing andsecurewith

parkplugandprimarywiresin cap

fullyseatedin sockets.Replaceigni-

ACEMENT

insideignitionsystemshieldnear

cover

verasdescribedinPara.172.

shersatterminalsandremovetwo

rewsandshakeprooflockwashers

hield.Liftcoilupand removesecond-

tomof coil.

ntosocketat bottomcoil.Replace

ashersattachingcoilbrackettoinside

apscrewssecurely.Attachdistribu-

-RedandBlackCr.Tr.)to negative

een)to positiveterminal.Tighten

ver



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7/27/2019 TM 9-802 GMC DUKW-353


NERATORANDCONTROLS

andinspection154

5

56

57

58

59

ION

controlsystemcomprisesgenerator,

ery,ammeter,andconnectingwires.Pur-

batteryfullychargedandtofurnish,when

rentforignition,lightingsystem,and

es.Onlygeneratorandregulatorarecov-

otherelectricalsectionsforinforma-

calunits.

shunt-wound,twobrushtype

gineanddrivenwith beltbycrankshaftin

mp.Generatoriscooledbyairdrawn

generatorby fanmountedbehinddrive

atrearof generatoraidsindirectingflow

hree-unittypecontainingcutout

dcurrentregulator.Theregulatoris

necompartmentpartition.

sistsofgenerator,regulatorandwir-

tleft frontsideofengineas shownin

hedtoleft-handenginecompartment

17. Filtersandcondensersusedincon-

sionaredescribedinPara.172.

drivenbyenginecrankshaftwith

terpumpandfan.As speedofengine

point,actionofgeneratorcreateselectri-

bysettingandspecificationsofregulator

urnishescurrenttovehicleelectrical


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ON,6x6

omaticallyopenandclosecircuit

tteryasneedsrequire,controlsmaximum

andcontrolsgeneratorvoltageoutput.

owingfunctions.

elayautomaticallyclosescircuit

tterywhengeneratorvoltagerisesabove

aticallyopenscircuitbetweengenerator

orvoltagefallsbelowthatof battery.

ageregulatorcontrolsgenerator

it toriseaboveavalue determinedby

entregulatorcontrolsmaximum

ge)anddoesnotallowoutouttoexceed

setting.

G

andremediesoftrouble,whichmay

ingsystem,arelistedinfollowingpara-


ndhighchargingrate

fNotifyOrdnance

latorReplaceregulator158

Replacegenerator159

Cleanand tighten154

nochargingrate

ctorReplace154

f

ce

ce

otifyOrdnance

eplace159

e

placegenerator159

seat157

59


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7/27/2019 TM 9-802 GMC DUKW-353


NERATORANDCONTROLS

ENANCEANDINSPECTION

runitsrequireperiodicinspectionand

okeepsystematpeakefficiency.Detailed

saredescribedunderrespectiveparagraphs

ttension.Correctadjustmentpro-

ctionatcenterof belt.Lowbeltten-

ndunsteadyoutput.Excessivebelt

aronbelt andgeneratorbearing.

Para.120 ifitis frayedorworn.

heckbrushesforwornconditionand

ectedinPara.157.Checkpig-tail

etheyare tight.Installcoverband.

heckbrushspringtension.Excessive

ommutatorandbrushestowear

nwillcauseareducedgenerator

ningofcommutatorandbrushes.

nasdirectedin Para.157.

spectcommutator.Ifdirty,cleanas

mmutatorisrough,out-of-round,

eneratoras directedinPara.159.

oenginecapscrews,tightenifneces-

racketboltsandtightennutsif

nadjustingarmtogeneratorcap

onsand,ifnecessary,removeand

ringforevidenceofinsulationcracks

necessary.

erandiferraticlocatetroubleand

rterminals.

t

ndexaminegasket.Ifgasketis

part.


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ON,6x6

terandDriveBeltInstallation

ringHarness

TESTS

emdifficultiesrequirestheuse of

killedpersonnel.NotifyOrdnanceMainte-

NANCE

mentscannotbeobtainedwithoutthe

ed personnel.NotifyOrdnanceMainte-

ENANCE

tioningproperly,followingadjustments

houtremovinggeneratorfromvehicle.

dofadjustingdrive beltisde-

ectionindicatesthatreplacementis ad-

or procedure.

ovescrewattachingbrushpig-tail

ension armandremovebrush.


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NERATORANDCONTROLS

ers,JunctionBlocksandWiring

dFilterWiring

s

s

arness

StarterWiring

k

ch

itchWiring

dinstall brushintobrushholder

nsttopof brush.Attachbrushpig-

crew.Tightenscrewsecurely.

yuse ofa"bedding"stone.With

diumspeed,pressstonefirmly

moveitbackandforthalongcom-

tactedbybrushes.Brushesshould

tperiod.Blowgeneratorout with

gstone,toremoveallparticlesof

yclothor sandpapertoseatbrushes.

ngtension,ToolNo.AEE-G-3,which

espringtensionwill causecommuta-

pidly.Lowspringtensionwillcause


G o o g l e - d

i g i t i z e d

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TON,6x6

ut,arcingandburningofcommuta-

coverbandandinspectcommutator.

nwitha stripofNo.00 sandpaper.Do

outall dustwithcompressedair.

EMENT

yoftheregulatorunitsare damaged

operlyadjusted,replacecompleteunitwith

tioned.

sandlockwashersat"ARM,"

sonregulatorandremovewires.

asherattachinggroundwiretoregu-

kwashersattachingregulatorto

artmentbulkhead.Removeregulator

bre washersareusedunderregu-

torandbracket.

chofthefour bolts.Installregu-

with lockwashersandnuts.Install

own.Tightennutssecurely.

ockwashers,alsogroundscrew.

sfollows:

andBlackCrossTracer

dRedCheck

roundscrewsecurely.

vebeendisconnectedforrepairor

eratorshouldbepolarizedafter

dbeforeengineisstarted.Reversed

orpointstovibrateexcessivelyand

neratoriscorrectlypolarizedby

umperlead between"Bat"ter-

beforestartingtheengine.This

eofbatterycurrenttogenerator

sgeneratorthecorrectpolaritywith

harge.


G o o g l e - d

i g i t i z e d

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NERATORANDCONTROLS

EMENT

revealthat generatorisdefectiveor

mpleteunitshouldbereplaced.

andwireat"FLD"terminalongen-

washer,condenserpig-tailandarma-

longenerator.

enser

washers,groundwireandcondenserat

l.Removetwoscrewsandfourlock-

generatorhousing.Layfilterand

washerandflatwasherattachinggen-

shersandboltsattachinggenerator

atorcannowbeliftedup tocom-

eandinstalltwobolts (oneeach

ountingandbracket.Installlock-

anddrawuptemporarily.

pulley,crankshaftpulleyandgen-

ratortoadjustingarmusingflat

apscrew.Adjustbelttensionas

efinaltighteningof mountingbolt

nser

usingusing twoscrews.Shake-

eusedbetweengeneratorhousing

of screw.(SeeFig.125,Para.172.)

andgroundwire(No.10black)to

crewwithshakeprooflockwashers

andunderhead ofscrew.

wireandarmaturewire(No.10

ongenerator.Attachfieldwire

k)to "FLD"terminalongenerator.

securely.


G o o g l e - d

i g i t i z e d

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ON,6x6

vebeendisconnectedforrepair

eneratorshouldbepolarizedafter

dbeforeengineisstarted.Reversed

orpointstovibrateexcessivelyand

neratoriscorrectlypolarizedby

umperlead between"Bat"terminal

estartingtheengine.Thisallows

erycurrenttogeneratorwhich

ratorthecorrectpolaritywithrespect


G o o g l e - d

i g i t i z e d

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HTING

andinspection163

4

ustment165

166

acement167

placement168

andtaillampsreplacement169

placement170

171

ION

sofserviceheadlamps,blackoutdriv-

rlamps;serviceandblackouttailandstop

mpsandactuatingswitches.

eadlamps,mountedonrightandleft

oublefilament"sealedbeam"type.These

nmainlightswitchis inserviceposition.

ontrolsupperandlowerbeams.

Blackoutdrivinglampismounted

headlamp.Lampiscontrolledwitha

trumentpanel(marked"BODrive")

acedin blackoutposition.Thislamp

eamto permitlimitedilluminationfor

nditions.

s.Blackoutmarkerlampsare

deof eachheadlamp,andareilluminated

his inblackoutposition.Duetocon-

mis notvisiblefromabove.Purposeof

ofvehiclefrominfront.Lampsincorpo-

ensanda coloredfilterwhichdiffuseslight

ilandStopLamps

nsistoftwounits:left-handrear

katleft ofwinch,incorporatesacombina-

ghtintheupper portionandblack-

ortion;right-handrearlamp,locatedon

h,incorporatesablackoutstoplampin


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ON,6x6

mFuse

ackouttaillightinthe lowerportion.

kouttaillampisdesignedtoproduce

msaredirectedsothat whenonevehicle

pecifiedsafedistance,thetwobeams

Thus,a driverisableto maintainthe

vehicleswhendrivingunderblackoutcon-

ackoutstopand taillightsisdiffusedso

visiblefromabove.

.Threesnap-intypelightsare

nelandilluminateinstrumentsand

el.Beamofeachlightis shieldedwitha

ngswitchesincludemainlightswitch,

ch,andpanellightswitchon instrument

ftofclutchpedal;stop lightswitchmount-

erationofmain,blackoutdrivingandpanel

ra.12.

G

ylampin systemfailstolightwhen

ollowinggeneralprocedureapplies:

charged.

r switchesareturnedon.

lb andreplaceasrequired.

rcuitfor shorts.

ovesit istobeinoperative.

(Fig.118).In theeventcircuitis

alfuse,lightswitchshould beturnedoff

shortinsystemdeterminedandcorrected.

plights failtofunction,evenafter

ncheckedandtested,troublemaybe in

licmastercylinder.


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HTING

ENANCEANDINSPECTION

eandinspectionoperationsasoutlined

MaintenanceandInspection"shouldbe

theintervalsstated.

onfromlampsinsystemit isimpera-

begiven tothefollowingoperations:

Lampbulbsmust notbeblackened

emaintainedatthe bulb.Lowbattery,

tactsinwiringsystem,andpoor ground

ein voltage.Checkwiringandconnections

yproperlycharged.Besurebatteryis

hatwiringbetweengeneratorandbattery

bulb burnsoutreplacebulborsealed unit.

ylensesabsorb alargeamountof

aselightoutput.Lensesareeasilycleaned

cleaner.Insideofsealedbeamunitlenses

selensissealedto reflector.

edifferenceofafewdegreesin

eadlampsor blackoutdrivinglampwill

esofthelightbeam.Theaimingadjust-

dbe checkedperiodicallyorwheneverthe

reflectors.Asprung orbentre-

m,makingit impossibletocorrectlyaim

ly remedyistoreplacereflectoror

fstoplamps donotilluminate

ootpedal,makesurethatbulbs arenot

witch.Alsocheckwiringforshort.Test

ulicmastercylinderundercentersection

oorboardsasfollows:

voltmetertoeachterminalofswitch.

tershouldreadbatteryvoltage.

adingshouldbe "0."

ckcorrectlyineithertest,replace

eadedinto mastercylinderunitandcan

nectingwiring.'

MENT

amshouldonlybeusedonhighway

hingvehiclesarenear.Upperbeamillumi-


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ON,6x6

mingChart

rtheraheadthanlowbeam.However,it

gher,whichinterfereswith anapproach-

rdepressedbeamshouldalwaysbe

nothervehicleandwhendrivinginwell

edbeamwillfurnishadequatelightto

roachingvehicle.Lowerbeamisobtained

tch(leftofclutchpedal).

rationsmustbedoneaccuratelyto

tbeams.Whenaimingheadlamps,light

.Thisconditionisusuallycausedbya

uiresreplacementofsealedbeamunit.

ngordentedby carelesshandling.

cedure.Headlampscanbeadjusted

thaheadlamptester;however,ifthis

imingPattern


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TING

ew

,adjustmentcanbemadeasfollows:

oorso thatheadlampsare25 feet

face,preferablyoflightcolor.Awall or

eof thevehicleshouldbeperpendicular

eonverticalsurfaceatheightof lamp

9.Locatepointson thishorizontallineon

eofvehicleintersects.Measuredistance

ddividethisdistanceequallyoneither side

twoverticallinesdirectlyaheadof each

tbeaminheadlampsand coverone

.

debowcompartmentandaimlamp so

swithhorizontalandverticallines as

htennut securely,takingcarenotto

atternonverticalsurface.

overits beamandproceedinsame

p.

LAMPADJUSTMENT

adjustablehorizontallybutnot ver-

justaimof lightbeamsobeamillumi-

aspossibledirectlyaheadofvehicle.

cedure

glight beam.Loosenlampmounting.


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ON,6x6

eckplatesufficientlytoturn lamphori-

breakcircuit groundandextinguishlight.

ghtbeamwill illuminateasmuchaspos-

of vehicle.Tightenlampmountingstud

gingadjustedpositionoflamp.

EMENT

emoval(Fig.121)

Loosenwingnutsonhold-downbolts,

erclampsandraisecover.Frominsidebow

wiringatjunctionblockterminalsandre-

teachlamp.

etfrombowdeckplatesowiring can

teachheadlamp tofreemountingstud

eand removelamp.

stallation—(Fig.121.)

o positionwithmountingstudin-

ntingplate.Threadwiring throughhole

bbergrommetintoplaceinplate.

ytojunctionblockterminalsas

SectionXVIII,"ElectricalSystem—

tudnutat eachlampmountingstudin-

dthenadjustheadlampaimingas out-

ebowhatchcover,swinghold-downbolts

ndtightenwingnutson hold-downbolts.

mUnitRemoval.Wheneverbulbof

it isnecessarytoreplacecompletesealed

nitis madeupoflamplens,reflectorand

herina unit.Removalprocedureisas

mpscrewatbottomoflamplensand

movethreescrewswhichattachsealed

lamphousingandremovering.Pullsealed

nd disconnectprongsofbulbfromwiring

mUnitInstallation

dbeamunitbulbinwiring plugand

ositionin lamphousing.Installsealed

dattachwith threescrewstolamp

ng,clipengagingslotat topoflamp

locatedatbottomoflamphousingand

.


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HTING

LAMPREPLACEMENT

AssemblyRemoval—(Fig.122).Driv-

separatebracketwhichisattachedtobow

emovedwithoutlooseningbracketfrom

nthatchcover.Loosenwingnutson

tstodisengagecoverclampsandopen

wirestodrivinglampatjunctionblock

partment.Loosenrubbergrommetfrom

anbe pulledthroughplate.Unscrewlock

udat mountingbracketandremovelamp.

AssemblyInstallation—(Fig.122).

osition withmountingstudthrough

alllocknutandwasher.Threadwiring

and pressrubbergrommetintoplacein

ytojunctionblockterminalsas

SectionXVIII,"ElectricalSystem—

rivinglampaiming.

swinghold-downboltstoengage

wingnutsonhold-downboltssecurely.

SealedBeamUnitRemoval.Whenever

outitis necessarytoreplacecomplete

beamunitconsistsoflens, reflector,bulb

ealedtogetherina unit.Removalproce-

Fig.122.

retainingscrewatbottomoflamp,

eamunitatbottomof lampandraiseup-

ousing.

ctorexposed,useascrewdriverto

iningring whichholdsealedbeamunit

ovesealedbeamunit fromring.

ofbulbfrom wiringplugandremove

dwire.

SealedBeamUnitInstallation

groundclip onsealedbeamunit

gsof bulbinwiringplug.

nto positioninmouldingring,put

reflectorand completeassemblybyusing

retainingringspringsunderflange of

andringsassemblyinlamphous-

agingslotat topoflamphousing,andin-

gscrew.


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ON,6x6

gIjght

Screw

AMPSREPLACEMENT

sRemoval—(Fig.123).

nthatchcovey.Loosenwingnutson

tstodisengagecoverclampsandraise

onnectwiringatconnectorandremove

dereachlampfrom insidebowcompart-

oclear mountingstudatdeckplateand

sInstallation

osition withwiringandmounting

ate andpositionlocatingdowelonlamp

ckplate.Screwlockingnut onmounting

dplugwireintoconnectorateachlamp.

BulbAndLensRemoval—(Fig.12:>).

wandtwistlensandcoverto loosen

ovelens andcoverassemblyfromlamp

nhousing.

BulbAndLensInstallation

lamphousing.Putlensand cover


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HTING

erLamp

ngagelockrivet inholeintop ofhousing,

therivetinhousingand installretaining

VICESTOPANDTAILLAMPSRE-

blyRemoval—(Fig.124).Removal

mpsis identical.

nnectorslocatedatbackoflamp

e.Removenutsfromtwomountingstuds

mpclearofmountingbracket.

ServiceStopandTailLamp

ht Unit

t


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ON,6x6

blyInstallation

ainstmountingbracketwithmount-

bracketandinstallnutsonstuds;tight-

wiringatconnectorsatrearoflamp.Be

perly.RefertoSectionXVIII,"Electrical

ectwiringhook-up.

oval—(Fig.124).Bulbissoldered

etaineriscrimpedoverlensandfitter to

enbulbis burnedout,itis necessaryto

.Thisappliestoboth rearlamps.

nit coverattachingscrewsandre-

utunitout ofsocketinlamphousing.

lation

itinlamp housinginsertingbulb

bulb andlensunitcoverin placeonlamp

ngscrews.

LAMPSREPLACEMENT

edininstrumentpanel andreplace-

dinPara.221.

WITCHES

esformainlightswitch,blackoutdriv-

mentpanellamps switcharedetailedin

oval

dcentersectionofdriver'scompart-

sstohydraulicmastercylinder.Disconnect

chat switchmountedintomastercylinder

tchassemblyfrommastercylinderoutlet

ation

yintohydraulicmastercylinderout-

estostop lampswitchterminals.Install

ompartmentfloorboardsandfastendown

al

menthatchcover.Loosenwingnuts

boltsawayfromcoverclamps,raisecover

with hold-upchain.

itchterminalsatswitchmountedin

ertoe-board.Removetwoscrewswhich


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TING

andwithdrawswitchfromholeintoe-

ion

toe-boardandattachwithtwo

switchterminals.RefertoSectionXVIII,

g"forproperattachmentofwires.

menthatchcover.Unfastenhold-up

swinghold-downboltstoengagecover

utssecurely.

on,checkeach

movebeamunitand

heckconditionof

nections.Wipewires

tainthatgrommets

wherewirespass

dy.


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S

uppression172

ERENCESUPPRESSION

esuppression(radiosuppression)is

sturbancesfromtheelectricalsystemof

terferewithproperreceptionofradiosig-

fvehiclelocation,byhighlysensitive

noiseinterferencemaybebasically

—IgnitionSystem,includingcoil,distribu-

ratingSystem,includinggeneratorand

givenoffbythesethreegroupsduring

temofvehicleareactuallyradiatedor

orsignals,thatinterferewithany receiv-

operatingin thevehicleorinits vicinity.

uppression,therefore,involvesthesup-

their sources—orconfiningthemwithin

tbepickedup bytheantennaofa radio-

shedbytheuseof sparkplugsuppres-

andcondensers.Inadditionto theuseof

prooflockwashersareusedwhenmounting

torandassociatedparts.

estingradiosuppressionunitsre-

nstrumentsandskilledpersonnel.Notify

rsonnelwhenradioreceivingorsending

ed.

placement

ondensers,notecarefullylocationof

thatthey canbeinstalledinsame

ng.

ndensersiti sextremelyimportant

ersbeusedunderheadofcapscrews

enunit andparttowhichit isbeing

erminalsmustbetighttoprovidea

mounting.RefertoFig.125for loca-

sers.


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S


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ON,6x6

placement

mcover.Loosencrankcaseventi-

.Removetwostudnutsattopofrocker

cientlytoclearflangeonignitionshield

cover.Removefourthumbscrews

Covercannowbeliftedfrom shieldand

verin itsproperposition.Press

ur thumbscrews.Tightenscrewssecurely.

cover.Locatecoverinits proper

hholesin cover.Installnutsandtighten.

seventilatortubeconnection.

ment

cover.Instructionsfortheremov-

e outlinedinPara.172g.

emovedistributorasdirectedin

.Removefivescrewsandlock-

ovalvepushrodcoverand cylinderblock.

cateshieldin itscorrectposi-

cover.Install fivecapscrewsandlock-

ndvalvepushrodcoverto cylinderblock.

ldistributoras directedinPara.

gnitiontimingas directedin

ver.Install ignitionshieldcover

istsoftwounits,the registeringunit,

nel,andtankunit,whichis mountedinfuel

wiringsectionofthis book,circuitforthis

itionswitch.Variouspositionsoftankunit

ance,permittingcurrenttoflowtoacali-

isteringquantityoffuelin tank.Referto

or electricalcircuitbetweentankunit

ge.

estingfuelgaugeunitsand wiring


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S

ntsandskilledpersonnel.NotifyOrdnance

ot registeraccurately.

panelgaugeisdescribedin Para.221.

ndsterndeckfrontplate.Procedure

s fullydescribedinPara.66.

e

andremovewire.Removefivescrews

ggaugetotank.Liftgaugefromtank.

opening,usingnewgasketbetween

escrewsandlockwashersattaching

ewssecurely.Attachwiretoter-

rely.

plateandsparewheel

hesepartsisfully describedin

ht-handsideofforwarddeckandis

rrentforoperationofhornis supplied"by

howninFig. 97.

shersattachingwirestohornandre-

shersandboltsattachinghornto

hornfrombracket."

cketandinstall twobolts,lock-

nutssecurely.

rminalsandinstall lockwashersand

ssecurely.


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ng177

ng178

andinspection179

nance181

183

5

6

ntenance187

ION

alve-in-headtypeconventionallymounted

bleforremovalandservicepurposesthrough

atch.Generaldataontheengineis itemized

ES

alcoversonly thebasicengineanddoes

ineaccessoriessuchas carbureter,water

eneratingsystem.Followinglistorindex

anualdescribingvariousengineaccessoryunits.

x

atorXVII

yXIX

elpumpandfuelfilterXXVII

E-SHOOTING

ublesonenginepower plantarecaused

ficiencesoftheenginemechanismproper

nalliedaccessorysystemsoftheengine.

ndsoftrouble-shootingchartswhichapply

inepowerplant.Onetrouble-shootingchart

ngfailuresoroperatingdeficiencies.The


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versmalfunctionsofmechanicalcomponents

ptomsandcausesitemizedinboth chartsmay

ver,asageneralrule,theoperationtrouble

usedbydriverandcrewwhilethe mechani-

8)willbe usedbymaintenancepersonnelto

hanicalfailures.

otingTable.Engineoperatingtrouble

reegeneralconditions.Theseare,(1)failure

3) unevenrunning.Chart,Fig.126,

stodeterminewhichconditioninTable

auseRemedy

park

charge(zeroreading)

rned

ch

gnition

onto

-

vely

adjust or

utor

d-

starter

dtighten

ng

oil

rcon-


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ON,6x6

— MISFIRES— ORRUNSUNEVENLY

ble

e

ONDITIONCONDITION

gineor

ieldCoil

Worn

age

ble-SnootingChart

ause

or

d

normaldischarge

exists

i-

y

o


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7/27/2019 TM 9-802 GMC DUKW-353


ause

on-

ough-

y)

p

toror

dSpark

tand

oughex-

ating

bureter

er and

old

oneor


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ON,6x6

auseRemedyParagraph

d?Checkenginetuneup180

and adjust;use

very

ugis

e

plugis

6

ckedReplace146

ng

nReplace147

veReplace144

om-

yl-

ingspeeds

ace146

st 145

ser

....149,150

nts

rreplace.... 144

eplace181

lace181

lace181

eplace181

1

essionService180


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outeProbableRemedy

onathighspeed

dtoo

breaker

gs

k

Con-

rCon-

LE-SHOOTING

ootingtablecoversingeneral,symptoms

ntheengine suchasconnectingrods,

ause

ootingChart

cking

orn

roken

enor

ssively

ption


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ON,6x6

ause

between

roken

irty

m

s

ositsat

s

hin

e

ding

d-

nd

8

8


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ause

tion

rn,or

fitted

dwith

undor'

badly

ting

olingsystem18

cosity

SectVI

orrectamount..SectVI

dsealsNotifyOrdnance

Correctpoordriving

ssive

on

driving

parkknock

secorrectfuel

Adjust145

ad-

closeReadjust181

ositsRemovecylinderhead

allnewsprings...181

erly—

nce

ndi-

op-


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ON,6x6

auseRemedyParagraph

cosity

SectVI

stuckClean,test spring,re-

edRemoveandclean

ndcon-

nceNotifyOrdnance

rto

ewassembly.185

lace221

dpistonwear

VI

drefillSectVI

cosity

SectVI

olingsystem118

perly

y

okenNotifyOrdnance

ervice199

too

articu-

ordriving

ildilu-

n-

ngfailure

VI

o Item(9)

cosity

SectVI

ghNotifyOrdnance


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ause

ted

cting

gn-

ution

em

cosity

t

ilure

cosity

rnal

re-

ted

shaft

outof

ution

8

tVI

tVI


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ON,6x6

ENANCEANDINSPECTION

vemaintenanceoperationsgenerally

epowerplantembraceallinspectionpro-

gineaccessoryorrelatedunits.Reference

V,"PreventiveMaintenanceandInspec-

ainingto engineanditsaccessoriesand

ttheintervalsdesignated.

inspectionandadjustmentprocedure

e ignitionandfuelsystems.Periodictune-

din Fig.127shouldbefollowedifsatisfactory

ousoperationaretobeobtained.Satisfactory

poperationscannotbeexpectedifa sys-

dheredto.Performingtune-upoperations

refullyfollowingfactory-recommendedclear-

satisfactoryresultswillbeobtained.Inorder

lthefollowingoperations,regulartune-up

ressiongauge,vacuumgauge,voltmeter,

.,arenecessary.

orestartingwithtune-upprocedure,

onshouldbe made,foranenginewithout

allcylinderscannotbesuccessfullytuned.

pendsuponcrankingspeeds,enginetempera-

dtheconditionoftheengine.If thereading

sionisreasonablyhighanduniformfor all

essuremaybeconsiderednormal.Makecom-

ingmanner:

.

f,"pullhand throttleallthewayout.

mengine

geinsparkplug holeinoneengineand

thstarting motor.Notehighestcompression

eisbeingcranked.Performsameoperation

dreading.

fapproximately110poundspercyl-

onwithinapproximatelyfive(5)pounds

ssionistoolow,thecause(eitherpistonrings,

sket)shouldbecheckedandcorrected.Loss

stonringscanbedetectedbypouring alib-

spark plugholeontopof piston,allow


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7/27/2019 TM 9-802 GMC DUKW-353


UpCycleChart

eadaroundpistonandproceedwithsecond

Ifcompressionincreasesmateriallyincylin-

a defectivepistonseal.Anextremelylow

indersmightindicatealeakycylinderhead

seating.

ure(Fig.127)

arkplugs

y

spectdistributorcap

nrotor

ect,clean,andadjust

tightenconnections.

ndadjust

djust

ureteradjustment...

rvice


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

ervice208

MAINTENANCE

tenanceembraceslashingoradjusting

es;periodictighteningofcylinderheadbolts;

ndvalvemechanism.Procedureswhichfol-

ntenanceoperationsinlogicalsequence.

alvelashorclearancebetweenintake

pectiverockerarm,isa procedurewhich

eriodicallyorasconditionsdemand.Clearance

esis.012 inchwithenginewarm.Adjust

r:

lvelashadjustment,enginemustbe

ormalizeexpansionofvalveoperating

operatingtemperatureshavebeen

fter15minutes),allowenginetoidlein

velashadjustmentoperation.

tilatingtubeatvalvecoverand remove

boltnuts.Removevalvecover.

(Fig.128)

allstudnutand insert.012inchfeeler

mandvalve.Adjustrockerarmball

eisindicatedbyfeeler gauge.After

nobtained,tightenrockerballstudnut,

geagaintomakesure adjustmenthas

teningnut.Repeattheseoperations

ouldbeadjustedwithengineat normal


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dandComponentParts

gcertainthatvalvecovergasketisin

mutilatedin anymanner.Installthe

ndconnectcrankcaseventilatingtube.

eMechanismAssemblyRemoval(Figs.

arytoremovecylinderheadandvalvemecha-

eplacevalves,springsand reconditionvalves

derheadassemblycanberemovedasaunit

ump,fanorotherengineaccessoriesexcept

,asdescribedinfollowingoperations.


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7/27/2019 TM 9-802 GMC DUKW-353


TON,6x6

or

oPara.

ieftube

nnect

e2

ctwind-

brake

efrom

eck

en-

ver

old

,hand

daccel-

bureter.

pboltat

nuts

haust

exhaust

onnec-

ldand

embly.

m

ead,also

cylinder

aturether-

inder

ankcaseoilfiller

bly(2

ndre-

erandattachingbracket

at

sionshield.Disconnectignitioncables

mbracket.

er tubetoblockbracket.

cover.Removevalverockerarm

ssembly.Liftvalvepushrodsoutof engine.

lockboltsandcarefullylift cylinder

Assembly

erheadandvalveassembly,makesure

nism


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odofCleaningCylinderHead

e cleanandfreefromcarbonanddirt.

et.Besure thatgasketisinstalledwith

cylinderhead.

emblyinplaceandinstall bolts.

oltsin theordershowninFig.132.

houldbeusedto obtainuniformtightening

Fig.133). Usetorquewrenchthefactory

0-70ft.lbs.Tightenboltswhilecylinderhead

onnections,runengineuntilnormaloper-

tainedandgiveboltsa finaltighteningwith

not beinserteduntilaftercylinderhead

sis necessarytoavoiddamagingpushrods.

ighteningofcylinderheadboltsis

peration.Underorover-tighteningofthese

sit frequentlyresultsindistortionofcylinder

ylinderheadgaskets,andusuallyleadsto

and shaftascompleteassembly.

overandgasket.

rtubebracket.

bracketwithshakeprooflockwashers.

stosparkplugs.

onshield.

acketassemblyandoilconnectionat


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ON,6x6

derHeadBoitswifhTorqueWrenchin

ertube andbreatherassemblyto

peraturethermaluniti ncylinderhead.

ontofhead.

exhaustmanifoldgasketswithmani-

bly.

dthrottlerod,chokerod andfootfeed

iperline,andbrakepowercylinder

ifold.

cleaner(Para.199),warmupengineand

rheadbolts.

8).

mpanwith gasket(with2valvecover

entilatortubetovalverockerarmpan

g.

eWrenchonCylinderHeadBolts


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7/27/2019 TM 9-802 GMC DUKW-353


filterClement

ypefilterisused. Partoftheoil passing

haftoilline isdirectedthroughtheoil filter

eabsorbed.Oilfilteredinthis manneristhen

eoilpan throughoilpumpmounting.

anceofa continuousandefficientfunction

nspectionandfrequentreplacementofthe

elementchangingperiodsaredirectlyrelated

ponentParts


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ON,6x6

typeand qualityofoilused,severityof and

tis, therefore,impossibletorecommenda

atwillmeetall typesofservice.Vehiclesoper-

e renewalsmorefrequentlythanthosewhich

ditions.Whiletheoilfilter willadequately

ngthe oil,theelementshouldbereplaced

dwiththesesubstances,regardlessofmileage.

cementProcedure(Figs.134and135)

inscoverandremovecover,gasketand

toremovesolidmatterandwaterwhich

mp locatedinthebottomofhousing.

essary.

andgasket,carefullyinspectgasketand

tion.

ACEMENT(Fig.136)

ylinderheadandvalvemechanismcan

enginecompartmentwithenginehatchcovet

entprovidesadequateaccessibilityforservice

lingunits.However,forthoseserviceswhich

t isrecommendedthatpowerplantbecom-

cletoprovidemaximumaccessibility,safety

cetobeperformed.

efollowingprocedureprovidesfor

chandtransmissionthroughenginehatch.

dbe notedthattheprocedureoutlined

fradiator,steeringgear,transmission,

uenceofthefollowingoperationsmaybe

ocalconditions.

dandconnections

erandclampit securelyagainstwind-

nutswhichattachupper andlower

oveeightboltsandnutswhichhold endsec-

t andremovebothsectionsofshroud.

hattachfantopulleyand removefan.

yremovingdraincocksat right-hand

t left-handrearsideofcylinderblock.

randlowerhoseconnectionsatradiator

hoseclamps.

ngtoandfromfilter byloosening

boltswhichattachfiltertoframebracket


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val

otorcable

rapfrombatteryterminaltoprevent

ttery.Removenutandlockwasher

ondenserwiresandbatterycableto

dremovewiresandcable.

controls

ntrolrodfrombell crankatendof

vingcotterpin.Disconnectthrottle

romcarbureter.Removeaircleanerto

ovalandplaceacoverovercarbureter

electricalfittingsfromleft-handsideof

eraturegaugethermalunitretaining

movethermalunit.

exiblehoseattoe board,usingtwo

ngofhose.

thornbyremovingscrew.

andregulatorwireharnessatjunction

wiperhoseatintakemanifoldtube.

pe

omflange attachingexhaustpipeto

pipeawayfromengine.


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ON,6x6

driver'scompartment

ectionsin driver'scompartmentto

accessoryunits.

omtirepumpfrontsupport boltsand

orropearoundtirepump andseat

ayfromtransmissionduringremoval

ffsupport

chpowertake-offsupporttotransmis-

woboltsatupper sideofpowertake-off

on).

akepedalandsupport

pinfromclutchpedalconnectinglink.


ofpedalrod.Removehairpinlockat

e clutchoperatingleveroffshaft.

spinwhichattachesbrakepedalto

ltswhichattachpedalsupportto

swhichattachsupporttoclutch

portandbrakepedal.

evercrossshaft

ntrolrodatcrossshaftleverby remov-

emoveretainingboltsand nutsattach-

transmission(onebolt onleftsideand

ghtside)and removecrossshaft,lever

bly.Thisassemblycanberemoved

brackettoclearlowerstud onright-

lercontrollever,crossshaftandbrackets

ertransfercasecontrolrodsatcross

tterandclevispins.Disconnectwinch

e-offbyremovingcotterandclevispin,

mwinchcontrolleverto transmission

movecotterandclevispinattaching

owater propellercontrolcrossshaft

vehairpinlockatright-handendofcross

dbracketcrossshaftandleveras an

chcontrollevertotransmissionstud

emainingnutwhichattachesright-hand

dremovebracket.

ntotransfercasepropellershaft

sfromflangesat eachendofpropeller

sleeve,slideshaftintoslipjoint until

dremovepropellershaft.


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utchhousing

uumlineatright sideofclutchhousing

dpullinghose offendofline.Discon-

crossshaftbyremovingcotterand

veshaftfrompowertake-off

take-offyoke,thenliftstop collar(snap

ftsplinesandslidering backonshaft.

take-offshaftusingaleadhammerto

ncover

attachtransmissioncovertotransmis-

erandgearshift leverasanassembly.

cleanclothtoprevententranceofdirt.

ortbolts

ortandleft andright-handrearsup-

ompartmentcarefullytomakesureall

weenpowerplantandhullhavebeen

rhooksandattachchainfalls. Asan

offsetthehazard ofengineslipping

at whichitisremoved,itis recom-

eusedin additiontoenginelifter

ows:

esand moveitslightlyforwardto

ckets.

erplanttowardright-handsideof

ermitpowertake-offtoclearsteeringgear

raisefront ofengineupwardintohatch

roximateangleillustratedinFig.165,

gineupwardthroughhatchopeningand

wn untilitclearstoeboards.

roughhatchopening.

Procedure.Itisimportantthatpower

horoughinspectionbeforeit isinstalledin

thenmoreaccessible.Thefollowingitems

nance).Iftheyshowtheslightest sign

rankshaftrearoilseal, clutchfacings,

mspring,retractingsprings,releasebear-

g.Transmissioncovermustbetakenoff

ntthroughenginecompartmenthatch


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ON,6x6

nginsulators

nsulatorsandreplaceiftheyare oil

verinsulatorsin positionsasshownin

hicle

proximateangleillustratedinFig.136,

necompartmentandholdrearof power

onclearstoeboards.

untilmountingbracketsareover

ghtenmountingbolts.

Mounting


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ver

ver

ethatnoforeign materialisincaseand

rationswithutmostcleanliness:

earsmakingsuregearsareplacedin

39.Placeshiftleverin neutralposition.

ralposition,shiftforksandshiftlug willbe

eachother.x

transmissionandinstallcover,making

agecollarsonsliding gears.Firstandreverse

gerockerlugwhichis fittedtoleft-hand

attachcoverto transmission,placing

headofforwardleft-handbolt. Checkshift

ons.If leverdoesnotworkproperly,remove

rceoftrouble.

fttopowertake-off

e-offoutputshaftandslideforward

crewinyokeand placesnapringin

fromdriver'scompartment

uumlingsatrightofclutchhousing

htenhoseclampbolts.

dto crossshaftusingcotterand

rolrodinbellcrankat endofstarter

cotterpin.


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ON,6x6

ansfercasepropeller shaft

nd installpropellershaftbetween

dtransfercase,installandtighten four

ontrollever,crossshaft andbrackets

verstudsontransmissionand secure

rear studonly.Installleft-hand

verasanassemblyand attachtotrans-

levertotransmissionstud.Installhair

ft.Attachpowerplantstabilizerrod

djustasdirectedin Para.277.Install

udandattachto powertake-offwith

ectwaterpropellercontrolrodsto

erandclevispins.

assembly

emblyoverstudontransmissionand

oleinleft sideandtwoboltsand one

ission.Connecthandbrakecontrol

ngcotterandclevispin.

pedaland support

pedaltotransmissionandclutchhous-

smissionandtwoboltsatclutchhous-

rendof shaftandinstallhairpin lock.

pedalcontrolsrodstopedalsusing

nectbrakepedalpull-backspring

sionfromwaterpropellertransfercase

support

rttopowertake-offandtransmission

ofsupport.

owaterpropellercontrolcross shaft

sdirectedinPara.290.

e

sketflangebetweenexhaustpipe

placeand installthreeboltsandnuts

nifold.

onlefthandsideofengine

cessiblefromenginehatchopening:

tertemperaturegaugein openingin

etainingnutsecurely.

perhosetointakemanifoldtube.

in SectionXVIIIandconnectgen-

tjunctionblock.

rn.


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blelineat toeboardusingtwo

ngofline.

okecablesatcarbureter.

onrightsideofengine

ndenserwiresandbatterycableover

udandinstalllockwasherandnut.

mebracketusingtwobolts,connect

filterandtightenflangenutssecurely.

and connections

ourbolts andlockwashers.Connect

osesto engineandradiatorand

nstalldraincocksandfill coolingsys-

zeandsee thatallconnectionsare

ttachlowerradiatorshroudsectionto

installuppersectionand boltthetwo

ncenoisesuppressionconnections

kesure thatallitemsofr adionoise

ENT

ctas areservoirtoholdand receive

icatesengineinternally.Itactsasa sump

sits oiltodistributeandcirculatesthrough

reprovidedatfixedpoints topreventsurge

hroughacoveredbasket-shapedfine-mesh

byaninvertedcupwhichpreventssurgeof

mponents


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ON,6x6

oair. Wheneveroilpanisremovedforclean-

eenshouldalsobe removedandcleaned.

g.140)

bly

ectedinPara.183.

thoroughlydrainedofoilbefore

gscrews.Removeoilpanattaching

mcrankcase.Oilintakescreenmay

aningpurposesbydetachingretain-

nsideofoil panthoroughlyand

crankcaseandoilpan.Do notover-

areretainedin front,andrearmain

acto holdgasketssecurelyonunder

gasketdirectlyon oilpan.Install

allend piecesofcorkingrooveof

ndinsertafewscrewsto holdpanin

mainderofscrews.Makecertain

ankcasesquarelyandthatallscrews

MENT

ypepumpandi smountedintheleft-hand

essibleforservicing(screen)andreplacement

moved.

emovedfromenginecompartment

83.Makecertainthat oilpanhasbeen

dinPara.184. Disconnectcrankcase

easshowninFig.141.

crewwhichretainsoilpump housing

housing.Withdrawoilpumpasshown

n

ssembly,makecertainthatmesh


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umpandOilLineasanAssembly

ycleaned.Screenmaybereadily

ainingwireoncoverandwithdrawing.

bly

nplace asshowninFig.141.Do not

vely,asthismaycausedistributorshaft

rewlocknut istight.Installoil pan

y

ochassisasdirectedin Para.183.

ubricantasindicatedinSectionVI,

elat dipstickandif allconnections

at gaugewithenginerunning.

MENT

ifoldsareeachaone-piececasting

inderhead withpilotrings,gaskets,studs,

niformassemblyattachmentgroup.The

sachannelthroughwhichtheresiduegases

dawayfromtheengine.The intakemanifold

deof heatingandfeedingthevaporizedfuel

alve.Themostimportantadjust-

maintainingpropermanifoldtemperatures

foldheatcontrolvalvefor seasonaloperation.

valveasshownin Fig.142consistsofalever

dinexhaustmanifold.Thisbutterflyvalve

umeofhotexhaustgases throughtheheaf


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ON,6x6

tControl

nifold;therebyaidsinfuel vaporizationfor

djustments(Fig.142).Duringnormal

valveshouldbeor anin"ON"position.

atherwithheavyloads,athighspeeds,or

uldbein "MEDIUM"position.Thisposi-

uringmildweatheroperationwithsmall

warmweather,orduring mildweatherwith

s,valveshouldbe closedin"OFF"position.

r:

nsetscrew.Movelevertodesired

orecessinmanifoldandtightenlocknut.

edure.Theintakeandexhaustmani-

, aftercomponentpartshavebeendiscon-

mtopof carbureter.

lerod,acceleratorthrottlerod,and

nkcaseventilatortubefromvalverocker

kcaseventilatortubefromcrankcaseven-

rewventilatorvalvefromintakemani-

akelinefromintakemanifoldadapter.

kemanifold.Remove3boltnutsfrom

austmanifold.


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s,fourmanifoldwashers,andfourmani-

epilotringsoutof cylinderheadblockintake

omstudsthatextendthroughflangesex-

of intakemanifold.

sextendingfrombottomofbutterfly

foldthroughexhaustmanifoldandanchorin

fuelchamber.Separateexhaustandintake

ect.

mcylinderheadports,betweenexhaust

erofintakemanifold,alsocleanpilotrings

lotring seats.

cedure

assembleintakeand exhaustmanifolds

nuts).Installpilotringsin intakeportsof

ewgaskets.Carefullyliftmanifoldassembly

ourmanifoldwashersandnutshandtight

foldclampsandstud nuts.Tightenall

formmannertoavoidleaksandheat

gasketbetweenexhaustpipeflangeand

exhaustmanifoldandexhaustpipeflange

ightenedinuniformmanner.Installadapter

elinetointakemanifoldadapter.Screw

manifoldadapter.Connectcrankcaseventi-

veadapter.Connectventilatortubetovalve

celeratorrod,handthrottlerod.Install

nutsand lineconnections.

TIONMAINTENANCE

caseandremovaloffueland water

reaccomplishedbycirculationofairactuated

ocrankcasebreatherfilterat oilfillertube

ghengine,isdrawnupwardandout ofthe

erarmcoverbytheintakemanifoldvacuum.

eisconnectedtoafittingat centerofintake

ringloadedplungertypevalvewhichacts

w (Fig.143).

conditions,thetubeandrestriction

eventilatingsystemshouldbedisconnected

ntervalsdependingupontypeofservice.The

eairbyfilteringof dustanddirtparticles,

ention.Thisisan oilbathtypewhichshould

ervalsas carbureteraircleaner.


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ON,6x6

lation

beandValveService

verockerarmscoverfittingand atvalve

ommanifoldadapter.Disassemblevalve,

ablecleaningfluid,anddrywithcompressed

dadapter.Connecttubetovalve.

kerarmcoverandtightenall connections.

rvice(Fig.144)

sideof breatheradapteratcrankcase

relementfrombreather.

hsuitablecleaningfluid untilallforeign

.Cleanoilreservoirthoroughlybywashing

tilit isthoroughlycleaned.Wipereservoir

fillto"oillevel"with engineoilasdirected

."


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r

withcompressedair.Do notilseex-

asmeshwill becomecompressedandfilter

toryforfurtheruse.Dipfilter elementin

Lubrication")andallowsurplusto drain

pterandtightenwingnutsecurely.


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emaintenance190

entparts191

nedprimarilytocarry exhaustfumes

er,whichisdesignedtodeadenengine

mmufflerthroughtailpipeto carryall

omvehicle.Exhaustpipeisattachedto

ketandsealclamp,andextendsintomuffler

ompartment.Mufflertailpipe.extends

ettunnelandexhaustsoutsideto rightof

his mountingistoprovidecoolingof

exhaustedfromenginecompartment.

G

tectanytroubleinexhaustsystemby

bowcompartmentorenginecompartment,

onsound,orbyodor ofexhaustfumes.

rriedintheexhaustfumesfromanygaso-

astelessand theonlywarningoperator

ceistheodorofexhaustfumes,however,

iven.At thefirstevidenceofexhaust

tionofallpartsofsystemshouldbe made.

auseRemedyParagraph

gReplacemuffler191

ons

ons....191

enorreplace191

noise

muffler191

ons

s....191

t

91

eTightensupportstraps..191


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auseRemedyParagraph

ons

ENANCEANDINSPECTION

ctionandpreventivemaintenancepe-

nV,"InspectionandPreventiveMainte-

d.

rmaintenanceisaccomplishedonthe

partmentandenginecompartmenthatches

artmentsthoroughlyventilated.

bemadeofconditionof mufflerinfront

ufflerclamptightenedifnecessary.

pectionshouldbemadeofexhaust

onsatengine.Ifgasketor sealsshowany

ouldbe installed.

deofexhaustpipe andmuffler,par-

edwateroperations.Ifanyofthe pipesor

osionorrust, thesepartsshouldbeimme-

dnotberunwhilemechanicis in

newpartshavebeenreplacedinexhaust

madeofall flangeandmountingbolts

or afewminutes.Bowcompartment

checkismade.

OMPONENTPARTS(Fig.145)

soffivedistinctunits—exhausttail

flertotailpipe shieldpipe,mufflerassem-

erpipe,andexhaustmanifoldto bulkhead

fivecomponentpartsmayberemovedor

ompartmenthatches

partmenthatchesandallowtimefor

reentering.

peshieldassembly

assemblyis designedtoprotect

contactwithhotexhaustpipeandis

tlet.Removebywithdrawing4

dtohull.

ashersfromboltsholdingflange


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


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7/27/2019 TM 9-802 GMC DUKW-353


Pipe T

mingBoltV

BB

C

olt FF

haustPipeII

ead

xhaustPipe

mp

p

elBolt

p

apBolt

rClamp

ming.Insidebowcompartment,re-

amp,bolt nutandlockwasher.Tail

by firstwithdrawingexhaustendof

hull, intobowcompartment.

t,removemufflertoexhaustpipe

t.Removemufflerlowersupportstrap

rapbolt,nut andlockwasher.Re-

amp,bolt, nutandwasher.Muffler

mbowcompartment.

ufflerexhaustpipe

ulkheadsealflangeclampwhichis

tandwasher.Removemufflertoex-

bolt,nutandlockwasher.Thisexhaust

nthroughbowcompartmentcover.

hield

attachedtoexhaustpipeatleft of

ampbolts,nuts andwashers,and

nginetobulkheadexhaustpipecan

headsealpipe

rts,itisnecessaryto enterengine

dsideofengine.Remove3exhaust

ts,nutsand locknuts.Whenthis

gasketandsealmaybe removed.Re-

fromexhaustpipetobulkheadseal

nnowberemovedthroughengine

headsealpipe


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ON,6x6

oexhaustmanifoldwiththreeflange

ttachpipeto bulkheadsealassem-

ckwithnewwire.

hield

toexhaustpipeat leftofsteering

nutsand washers.

ufflerexhaustpipe

artmentbeforeentering.Attachpipe

angeclamp,clampboltnut and

withmufflertoexhaustpipeclamp,

.

pipewithbulkheadsealto muffler

er.Attachmufflertotailpipe with

bolt nutandwasher.Replacemuffler

ersupportstrap bolt,nutandlock-

pe

pipethroughopeninginhulllocated

owairoutlet grilleopening.Hold

ening2 nutsandwashersontail

tachtomufflerwithtail pipeto

dwasher.Tighten2nuts intailpipe


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7/27/2019 TM 9-802 GMC DUKW-353


3

ION

uralcenterofthevehicle—for,inaddi-

nishessupportforthehull,powerplant

ercarriage.

spectsto frameofaconventional

tudinalchannelsiderailsconnectedby

berswhichsupporttransfercasesare

rcasereplacement.However,allother

dtosiderails.

RAME

meanditslocationinside hull,very

quiredon frameproper.However,itis

tswhichattachframeto hullstructure

nspectedandtightenedregularly.

ntingBolts.Boltsandnutswhich

klesoffrontspringandrear axletrunnion

forcingplatestoframepassthroughhull.

ompoundmustbeusedaroundbolts topre-

operation.Headsofboltsareaccessible

tsareaccessiblefromwheelhousesonout-

Bolts.Frameis boltedtoinside

nts:bowcompartmentbulkheadatex-

rontend ofcargocompartmentfloor

nofframe;and,rear endofcargocom-

rearof frame.


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7/27/2019 TM 9-802 GMC DUKW-353



ption

eair cleaner199

djustidlerscrew203

control203

Tightenconnections198

Tightencoverto bodyscrews.Refwence

.Tightenknurlednutattop

Tightencoverboltattop of

ket.200

98

Replacetank207

98

ystem116

adtoratedcapacity7

atetoproperpressure...288

stbrakes94

pandlubricatechoke

206

Replacecarbureter204

Adjustcontrolwireat car-

03

g

Freeupand lubricatethrottle

Replaceacceleratorreturn

screw.. 203


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ON,6x6


Adjustidlingscrew203

l lineconnec-

t.200

p202

cceleration

eplacecarbureter204

ENANCEANDINSPECTION

detopre-startingpreventivemainte-

ribedinPara.14andother preventivemain-

structionsasdescribedinSectionV,"Preven-

ection."

antpreventivemaintenanceoperations

fuelconnectionsaswellasservicingoffuel

mpandaircleaneratintervalsindicatedin

intenanceandInspection."Servicingin-

sfuelunitsare itemizedinrespectivepara-

es,filter,fuelpump,andcarbureterare

artmentsinthehull.Wheneverleaksoccurat

uelhasbeenspilled intocompartment,result-

hazard.Maintenanceofallfuel connections

tremelyimportant.Carelessspillingofany

stbeavoided.

ents.Allcompartmentswhichcontain

oroughlyventilated,beforeandafteropera-

ectedatanytime,completeventilationof

mmediatelymade.Donotcarryopenflame

anytime.


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CE(RefertoFig.146)

ounteddirectlytotopofcarbureter

dust anddirtfromenteringcarbureter.

sintooil chamber.Duetoimpactandsud-

st alldirtinair isthrownintooil and

ner.Partiallycleanedairpassesthrougha

ereremainingdustis trapped.Thisdust

uteparticlesofabrasivewhich,ifper-

userapidwearof movingparts,resulting

asedoilandfuelconsumption.

ircleanerinproper conditionshouldbe

ponsibleformechanicalupkeepofengine.Air

tregularintervals.Underadverseconditions,

ondustyorsandyterrain,unit shouldbe

ntvehicleoperatesinduststorm areas,

immediatelyaftersuchstormsoccur.


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

offuelfilter

embly

lampsthroatofaircleanerto carbu-

ymaythenbeliftedfrom topofcar-

atcenteroftop coversothatcover

entfromcleanerbody.

ughlybyflushingina panofsuitable

onshouldberepeateduntilall dirthas

dryandcleanwithair pressure.Do

ssure,asmeshwill becomecompressed

factoryforfurtheruse.Dipelement

ow surplustodrainoff.Washreser-

dand wipeoutwithcleancloth.

e

insideofcleanerbody,usingoil as

brication."Replacefilterelementinto

cover.Makesurethat corkgasketin

ndforms aseal.Installwingnut and

aircleanerassemblyoncarbureter.


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7/27/2019 TM 9-802 GMC DUKW-353


rbureteradaptersealin cleanerbody

heckadapteredgeandmakesureit is

willfitproperlyagainstsealwhen

pter.Pressdownoncleanercoverto

dholdunitwhiletighteningclampbolt.

E(RefertoFig.147)

nright-handframesiderailbetweenfuel

accessibleinenginecompartment.Fuelfilter

arintervals.

blefilter

outletlinesby unscrewingflangenuts.

ngbolts.Aftercoverbowlattopof

ybewithdrawn.Filterelementand

doff ofbowlstem.Removedrainplug

ntshouldbethoroughlycleanedofall

blecleaningsolutionandbe sureall

mbetweendiscsofelement.Inspect

eifnecessary.

elfilter

steminfilter bowl,thenelementover

ssingspring.Assemblecovertobowl,

correctposition.Installhex headcover

ytopreventfilterleaking.Install drain

Placefilterin positiononmounting

untingbolts.Connectinletandoutlet

tennutssecurely.

ht-handsideof engine,isadiaphragm

edfromcamshaft.Inadditionto camshaft

unning,pumpis equippedwithhandoper-

sedto pumpaninitialsupplyof fuelinto

hasrunout offuelorcarbureterbowlhas

on.

periodicintervals,fuelpumpfilter

ndthoroughlycleanedofallsediment.This

nscrewingbowlclampknurlednutattopof

bewithdrawnfrompumpand thoroughly

uldbereplaced.

mpmaybe givencapacityandpres-

theror notitis functioningproperly.These

distinctfrom eachotherandmustbemade


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ON,6x6

gine.Testshouldbe madebeforepumpis

hanotherassemblytodeterminecondition

histest,todetermineonlythatsuffi-

ng.This maybeaccomplishedbydis-

arbureterlineandattachingasuitable

outlet sothatfuelmaybe caughtina

eederhoseat carbureterlevelor

shouldbe approximatelyonepintin

tionofengineat 2000to2500rpm.

edwitha standardfuelpumppressure

ffuelpump.Pressureshould be3%

stidlingspeedofengine.

ressureto exceedmaximum(3%Ibs.)

flowincapacity,fuelpumpoperationcan

EMENT

uelfilter anddisconnectfuelpumpfuel

hichattachfuelpumptobracketandremove

itioninengine.Installmountingstuds,

n correctplaceforoilfilterreturn line.

ine tomountingstud.Connectfuel

Openshut-offvalveat fuelfilter.After

akefuelpumptestsaspreviouslydescribed.

TMENTS

ents,exceptidling,aredetermined

tsandcan onlybechangedbydisassembling

fferentjets.Chokeandhandthrottlecontrol

rmustbecarefullymaintainedinorderto

erformance.

nt

mixture,warmupengineso thatintake

o thehand(120° F.orhigher).Slowengine

wiseforrichermixtureor counterclock-

rnidlingscrewuntil enginerunssmoothly.

einno wayaffectsfunctionofcarbureter


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

rod.Fastenendof flexiblehousingby

ecurely.Placethrottlecontrolcollaron

tscrewsecurely.Foradjustmentof

rtoPara.203.

blehousingandwirethroughcontrol

twire throughswivel.Fastenendof

ingclipsetscrewsecurely.Tighten

Foradjustmentofchokecontrol,refer

anerasdescribedinPara.199.

EMENT

scribedinPara.204.Liftgovernoroff

dgasketovercarbureterstud.Place

studinsucha mannerthatarrowindi-

pward.Installgovernortocarbureter

dinsucha positiontoallowvacuum

orforoperationofcarbureterpowerjet

s ingoodconditionandthatvacuum

ed.Installcarbureterandaircleaneras

d204.

REPLACEMENT(RefertoFig.148)

reforr eplacementofacceleratorand

velybeginningwithacceleratorpedal.How-

chokeandhandthrottlecontrolsmaybe

esired.

rolRemovalProcedure

nPara.221.

emovalProcedure

ol

nPara.221.

movalProcedure

rtment,removecotterpinandclevis

dbracket.Fromundersideofaccel-

randwasherfrompedalto idlerlever

nnowberemoved.


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hrottleandChokeControl

tton

rLeverRod

racket

et

Rod

ontrolLever

ControlLever

er(cast)Adjusting

rtoCarbureter

er(formed)

r(cast)

er(cast)StopPin

oneattachedto

edtocastlever

ring

Block

everr od

emoverodcotterpinandwasherat

rankrod cotterpinandwasherat

erleverto bracketpincotterpin

erlever.

edalandidlerleverbrackets

d,removethreenutsandwashers

ettotoeboardand removebracket.

emovepedalbracketbywithdrawing


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ON,6x6

ell crankrod

sherfromendofrod atbellcrank

uretercontrolleverrodadjustable

tbell crank,thenremovebellcrank

erandclevispinand removebell

arburetercontrolleverrod

sherfromrodat carburetercontrol

ntrollevers(atcylinderblock)

er(lighter)returnspringfromend

removecontrolleverinner(heavier)

controllever.Removecotterfrom

o carbureterrodandremoverod

Removenutandwasherfromcon-

dremoveboth controllevers.

ntrollevertocarbureterrod

hrottlecontrolwire trunnionblock

re.Withdrawwirefromendofrod

ureterlever.

allationProcedure

ollevertocarbureterrod

everfromengine side.Inserthand

ghendofrod andinstalltrunnion

curely.RefertoPara.203forhand

olleversCatcylinderblock)

positionin formedcontrolleverwith

ward.Assemblebothleverstomount-

asher,lockwasherandnut.Hook

blockpin,heavierspringon inside,

oformedcontrolleverand lighter

er.Adjustcastcontrollever adjust-

ximately%"clearancebetweenend

Tightenlocknut.

rburetercontrolleverrod

oughupperendofcastcontrollever

dcotterpin.Rod mustnotbind.Be

willworkfreely.

dside ofbellcrankbracketwith

erpin.Donot attachcarbureter

od,to bellcrankatthistime.


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alandidlerlever brackets

ttachacceleratorpedalbracketto

bolts throughbracketandthrough

eboard.Theninsertthirdbolt with

ntoeboard.Inengine compartment

onlowerbolt.Then placeidlerlever

erbolts andsecurewithtwolock-

-handsideof idlerleverbracketand

tterpin.

crankrod

nterholeofidlerleverand inopen-

nkinsucha mannerthatrodwill

ndof rodtowhichwasheriswelded

al

ttachpedaltotoeboardbracketwith

altoidler leverrod

andidlerleverwithwasherand

suchamannerthat rodwilltravel

rburetercontrolleverrod yoke

ullthrottleposition(layingon stop

rthrottletofullthrottlepositionby

arburetercontrollevertowardrear

urnspring.Withcastcontrollever

adjustableyokesopinholesin

n endofupperarmof bellcrank.

and tightenyokelocknut.

EMENT(RefertoFig.149)

edure

ngremovaloperation,fueltank

ccomplishedbyremovingfillercap,open-

drainholes,andremovingdrainhose

bedrainedinto asuitablecontainer.

irehold-downclampboltnut,then

e rimandtire.Removesterndeck

ionsgiveninPara.66.Disconnect

minal,fuel linehoseattopof fuel

ut,andfuel tankdrainhosehv


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


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7/27/2019 TM 9-802 GMC DUKW-353


onnectionPlug

tionFuelLine

uelLine

xibleHose

FilterFuelLine

onnectionsFuel

erConnection

dHole

atfueltank.Removenutsfrom 2

d removetankfrom"vehicle.

ocedure

n fueltanksupportsandsecureby

Install fueltankdrainhoseon

enhoseclampbolt.Closedraincock

ingplug.Connectfuelline hoseto

flangenut securely.Connectwire

minal.Replacesterndeckplateac-

eninPara.66.Placespare wheel

kplateandsecurewithclampbolt

MENT(RefertoFig.149)

coveredwithprotectivelooms,where

enfueltankandcarbureter.Flexiblehoseis

kandsterncompartmentbulkheadalso

pumpto eliminatepossibilityoffuelline

isprovidedatfuelfilterfor convenience

operationsonsystem.Adrainhoseextends

side openingfordrainingtank.Drain

dandcouplingplug athullinstalledat all

gtank.

linesaresecurelyfastenedin posi-

readilyremovedorinstalled.Referto

ovariousfuellines andconnections.

econtainersand

serviced.


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ARTS

andinspection211

nt212

ustment213

acement214

acement215

acement216

ntrolsandpipingreplacement... 217

veandpipingreplacement218

ION

teelplates,anglesandchannels

andboltedtogethertoforma unitstruc-

dedintosectionsorcompartmentsby

dedandboltedinplace.Metaldeckplates

oorboardsaresupportedonsupportangles

panels,supports,deckplatesandfloor

r chassisframe(asaseparateunit)is

eddowntobottomof hull.

partmentsareopenattop orcovered

eandsterncompartmentsarecoveredby

hcovers.Hatchcoversarewatertight

clampeddown.RefertoFig.43in Section

enanceandservicingofunitslocated

eredbyfloorboards,etc.,isfullydescribed

pumpwateroutofhull.Three types

ehicles:a beltdrivengeartypepump;a

ump;andahandpump.Thefirst two

sgroup,while useofhandpumpis outlined

,"SectionIII.

m

untedonchassisframesiderailon

chislocatedapproximatelyunderdriver's

om apulleyonwaterpropellerdrive

onstantlywheneverwaterpropelleris


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ARTS

onnectedtoasystemofpipes andcontrol

rtopumpwaterfromanyone offour

ship,leftrear,rightrear).Sincepumpis

unwithoutsomewaterpassingthrough

rreservoirisprovidedinsystemand con-

hullexteriorwithasmallinlet pipe.Inlet

upplyofwaterto pumpwhenevervehicle

oughan outletinsideofhull (above

onnectedtopumpoutlet bypipeand

cockisprovidedatlowestpointin outlet

escanbedrainedimmediatelyafteroper-

System

umpis mountedonchassisframe

bracket.Pumpislocatedbelowfrontcen-

rtment.Achaindrivespumpfroma

erdriveshaft.Pumpoperateswhenever

.Asingleintakestrainer isconnected

epthofwatermustbe approximately5

straineris submergedandwaterwillbe

hargedthroughanoutletin sideofhull

utletisconnectedtopumpoutlet bypipes

G

lgepumpsandfailure ofvacuum

xtentofitems relateddirectlytothis

Table"belowcoversthesetroubleswhile

herunits arelistedintheir respective

auseProbableRemedyParagraph•

preferablyfrom

ofFastentarpaulindown

twater215

ealsCheckcoversealsand tight-

clampbolts...214

plitNotifyOrdnance

s-

orreplaceseals 228


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ON,6x6

ause

uff-

king

n-

in

s

ll

aph

g

93

ativeor inefficient

rokenTightenorreplacebelt.212

dCleanstrainersandhull

ng

pesys-

g

noperativeorinefficient

ys-

king

perinoperative

ed


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ARTS

antphasesofpreventivemaintenance

dparts,ispropercleaningofthebilges be-

tion.Thesebilgesshouldbe thoroughly

all dirtleaves,etc.,removed.Atregular

kestrainersshouldbeexaminedand

atelysealed;however,theseseals

ularintervalsandreplacedif necessary.

rticularcareshouldbetakento thor-

eis goingtobestoredor standingidle.

fmanifoldmustbe openandclear.This

rleftsectionofair intakegrilleisopened.

pump.

DJUSTMENT

onecessaryadjustmentswhichshould

adjustedasnecessary.

mpMountingandDriveAdjustment

aseUpper

olts

ase


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TON,6x6

mpPackingAdjustment

elt.Drive beltshouldbetightened

wsthatbeltdoesnothavesufficienttension

oceedasfollows:

nofairintakegrille.

mountpumpbrackettoframe

dmountingbrackettowardleftsideof

belt.Tightenmountingbracketboltnuts

acketinnewposition.Checkbelttension

readjustiftensionisnot correct.

air intakegrille.

haftPacking.Packingisprovided

yend topreventleakageatthispoint.

edwheneveranexcessiveamountofleak-

Asmallamountofleakageis necessaryto

aft.RefertoFig.151.

nofairintakegrille.

enchKM-J-2342andbackawayfrom

ghtenpackingnutuntil leakageisre-

ped.Tightenlocknutagainstpacking

air intakegrille.

EPUMPADJUSTMENT

astwonecessaryadjustmentswhich

rlyandadjustedasnecessary.


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ARTS

BilgePumpDriveAdjustment

ke

Bolts

DriveChain.Wheneverdrivechain

o slaporchaintoride offpulleys,chain

oFig.152.

ectionofcargocompartmentfloor

hingpumpmountingbrackettoframe

tsareaccessibleinframechannelasshown

racketdownwardinrelationtoframe

hain.Thismovementispermittedbyelon-

tingbracket.

ramerail mountingboltswithpump

keupslackinchain.

ountingbracketisnot sufficientto

mustbeshortenedbyremovinglinks.

onof floorboard.


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ON,6x6

kingAdjustments

DriveShaftPacking.Packingaround

gis providedtopreventleakageatthis

ghtenedwheneveranexcessiveamount

shaft.RefertoFig.153.

ectionofcargocompartmentfloor

ovidedin floorboard.

wninFig.153 sufficientlytopermit

TightenpackingnutwithwrenchKM-J-

edbut notentirelystopped.Tightenlock

tchin packingnut.

onof cargocompartmentfloor

PARTSREPLACEMENT

Removal.Allhatchcoversarehinged

closedpositioninasimilarmanner.Like-

einstalledthesameunder allhatchcovers.

d-downboltsso boltscanbedis-

paswhenopeninghatchcovers.

sfromeachhatchcoverhingepin

ndhingehalvesare weldedtohatch

amps,boltretainersor hingehalvesmust

mustbebroken.

romchannelshapedretainers at-

eckplateby startingremovalofstripat


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ARTS

tedtoolandpullingsealout byhand.Care-

stripsarejointedor lapped,

nstallation

channel-shapedretaineronhatch

er lengthstoassurewater-tightjoints.

ypinchingedges togetherwhileinserting

or hingehalvesaretobe installed,

onand weldinplace.

sitionoverhatchopeningso hinge

dinstall hingepins.Insertcotterpinsin

ver.Swinghold-downboltsintopositionon

wingnutstoclampcoversecurely.

ontBulkheadRemoval.Removalof

placementofmaintransfer.case.

ofcargocompartmentfloorboardsto

gitudinalfloorsupports.

utsattachinglongitudinalfloorsup-

eboltsandnutsattachingeachendof bulk-

wardto removebulkheadfromvehicle.

ontBulkheadInstallation

onandinstall boltsandnutsattach-

o hullsides.

entlongitudinalfloorsupportswith

fbulkhead.Installboltsandnutswhich

khead.Putfrontsectionsofcargocom-

ace.

emoval.Sterncompartmentmay

nstern deckplate.However,removalof

ffuelgaugetank unitrequiresremovalof

orethisplatecan beremoved,sparetire

Para.66 forcompleteinstructionsonre-

wellassterndeckplate.

stallation

t sideofvehicle,placesterndeck

ecksupports.Fueltankfillerneckmust

deckplateasplateis putinposition.

endoffillerneckandfit intoposition

ckplate.Attachfueltankfillercap chain

in place.

er edgeofsterndeckplateand

ngmemberstosecureplatefirmlyto deck

e carrierstrapinraisedposition,lay


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ON,6x6

nsterndeckplateandlocateproperly

erstrapdownoversparetire andengage

downboltin eyeboltinstern plate.Tighten

ampspare wheelandtiresecurely.

Removal.Bowdecksurfcoamingis

ges onloweredge.Surfcoamingmaybe

weredpositionbybracerods ateachend

redgeofsurfcoamingandclampbrackets

f coamingbraceclampboltsanddis-

lates.Swinghingedclampplatessocoam-

t ofclampbrackets.

w deckhatchcoverhold-downbolts,

erclampsandopenhatchcover.

nttogainaccesstobolt nutsonunder

achsurfcoaminghingeto deckplate.Re-

ompletesurfcoamingassembly,including

nbe removedfromvehicle.

Installation

emblyinpositionon frontendofbow

es withholesindeckplate.

ughhingesanddeckplate.Putnuts

bowcompartmentandtightensecurely.

atchcover.Engagecoverclampswithhold-

gnuts toclamphatchcoverinclosed

cesinclampbrackets,swinghinged

engageendofeachclampplatewithclamp

securely.

tlehookismountedthroughrear

ustbeaccomplishedfrominsidesterncom-

4.

rn compartmenthatchcoverhold-

tsfromcoverclampsandopenhatchcover.

mpartment,removesixboltswhich

ertoinnerend ofhousinginsternbulk-

gasket.Removecotterpin,largenutand

tle hookshaft.

gasketoffspringoutersleeve.Slide

,andspringinner sleeveoffendofpintle

hiclemaythenpullpintlehookout-

ofshaft.


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ARTS

allation

ig.154).

okshaftthroughholein rearendof

Whilehookisheld inpositionagainsthull

ompartmentandslidespringinner sleeve,

eveoverend ofpintleshaft.

andretainerplateover endofspring

sheroverendof pintleshaftandthread

nut sufficientlytoholdcoilspringunder

attles.Theninstall cotterpin.

endcoverin positionagainstretainer

bulkheadandinstallsixattachingbolts,

ventleakagearoundgaskets.

RTAINSREPLACEMENT

partmentsarecompletelyenclosed

linsandcurtainsare inplaceandproperly

sinstalledinsectionssoone section,ora

anbeinstalledorremovedseparately.Sec-

ainsandpoints ofattachmentarelisted


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ON,6x6

ows.Fivebowsovercargocompart-

artmenttarpaulin.Endsofeachbowfitinto

eofcompartmentsurfcoaming.Bowsare

ed outreadily.Eachbowcanbedisassem-

movingboltsandnutsholdingpartsto-

Bow.Atubularmetalbowismounted

dtosideof hullbehinddriver'sseatand

srearsupport fordriver'scompartment

ceunitbut canbeliftedoutof clampsfor

ampbolts.

Tarpaulin.Aone-pieceflattarpaulin

artment.Tarpaulinisattachedwithfas-

op ofwindshield.Rearedgeispulledover

partmentandhelddownby ropes.Untie

enerstoremovetarpaulin.

HingedSideCurtains.Curtainswith

mesarehingedat forwardendtoside

tframe.Curtainsareprovidedwith

losedagainstmetalbowbehinddriver's

novercompartmentoverlaptoenclose

ent.Removalcanbeaccomplishedbyopen-

gto disengagehingerodendsfrom

rpaulin.Aone-piecetarpaulinis

gbowsabovecargocompartment.Tar-

andbucklesspacedtoattachtobowsat

astentarpaulinto bowsalongcenterof

astenedto eyesattachedtosurfcoaming

ntwithtieropes.Endsof tarpaulinextend

d arepulledtightandtied tobulkheads

TarpaulinExtension.Thisextension

airintakebetweendriver'scompartment

Frontedgeofextensionisattachedtotar-

rtmentwithstrapsandbuckles.Hearedge

rgocompartment.Tieropesat eachrear

hittightover cargocompartmentbowand

in sidesurfcoamings.Sideflapsattached

berolledup topermitairto enterair

ouldbeloweredand fasteneddownonly

extremelyroughwater.Enginecooling

ywhenairintakeiscompletelyenclosed.

dCurtains.Eachendofcargocom-


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ARTS

ountingandWipers

endcurtainwhichisattachedtofrontand

urtainshangstraightdownandaretied

kheadswithropesinloweredge.

PERSREPLACEMENT

emoval.Thisvacuumoperated

fwindshieldframeandconnectedtovac-

e.RefertoFig.155.

uumtubenearwipermotoron rear

wwiperarmlocknutfromend ofwiper

shieldandremovewasherandwiperarm.

achsideofwipermotor.Thesescrewsat-

hieldframe.Pullwipermotorawayfrom

rsframe.

stallation

ghhole inwindshieldframeatrear

chmotorto framewithtwoscrews.As-

f motorshaftfromfrontsideof windshield

dwasher.Connectvacuumhosebetween

Removal.Rightwindshieldwiperis

eldframeat rightsideandis handoper-

hattacheshandleonrearside ofwind-

nghandle.

ftawayfromfrontsideofwindshield

ame.

nstallation

throughwindshieldframefromfront


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ON,6x6

end ofshaftfromrearside ofwind-

y installinglocknut.

val.Glassandglassframeassembly

larsupportingframewithoutloosening

RefertoFig.155.

eldneartopusea screwdriverto

en.Atrearsideof windshieldremovetwo

toradjustingarmclampboltsateachend

vacuumhoseatleftwipermotor.

ssemblyoutwardat bottomtoclear

enslideglassand frametoleftfromfront

entwilldisengageportionofhingecon-

portionof hingeconnectedtotubularsup-

andframetosuitablebenchor table.

utsandboltsattachingtop sectionof

meandpullofftop sectionorchannel.Re-

eft sectionsofframeandcleanallframe

tion

annelswith soapsolutionorrub

assinstallation.

eroveredgeofnewglass andslide

filler andglass.Fitfillerstrip atcorners

fglass insamemanner.

eovertopedgeofglass sectionsand

nnuts.Replaceglassand frameassembly

vehicleby slidinghingesectionstogether

e) ofsupportframe.Bendendofhinge

on.

regulatoradjustingarms overad-

endof windshield.Theninstallthumb

pwindshieldinclosedposition.

SupportFrameRemoval.Complete

pportframecanberemovedasan assem-

sfromregulatoradjustingarmclamp

shieldandremoveclampboltsandwashers.

dtubularsupportframeto betippedfor-

on stanchionsindeckplate.

rewsin bottomtubeofsupportframe

setin Fig.187.

edholeineachpivotpin ateachend

rameto assistinpullingpin.Then re-


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ARTS

pletewindshieldglassandtubularsupport

beliftedofffromvehicle.

SupportFrameInstallation

yinpositiononvehicleand lineup

oles insupportbrackets.

ethrougheachbracketandinto

toinsetin Fig.155.Setscrewholesin pins

wholesinframetube.

ttomtubetoholdpivotpins inplace.

dshieldtoverticalpositionso thatslotin

rmisalignedwithhole ineachsupport

mpbolts throughregulatoradjust-

,usingwashersin correctposition.Puton

toclamptubularsupportframeand wind-

on.

RIVE,CONTROLSANDPIPING

ve Removal.Pumpdriveconsistsof

atfrontsideof waterpropellertransfer

n pumpshaft.Pumpismountedonchassis

stablebracketlocatedbelowdriver'sseat.

rsectionsofair intakegrilleforaccess

hoseclampsatpumpinlet andoutlet

esetwopoints.

untingbracketbolts,nutsandwashers.

takedrivebeltoffpulleys,lift pumpoff

vethroughairintakegrilleopening.

enpulley onpumpshaftandremove

nutwhichlockdrive pulleyonwater

ftand,utilizingtappedholesin pulley,

emovepulleyandWoodruffkey.

ve Installation

ndWoodruffkeyonend ofshaft

ellertransfercase.Tappulleylightly

b todriveonshaft.Install largenut,

tcotterpin.

yandkeyonend ofpumpshaftand

.

gbracketin positiononframebracket

olts,washersandnuts loosely.Connect


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ON,6x6


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ARTS

utletandtightenhoseclampboltssecurely.

ver bothpulleys.Slidepumpand

eftsideofvehicletotakeup slackinbelt.

owni nFig.150.Withbelt tensioncor-

gbracketboltstoclamppumpin adjusted

ectionsofairintakegrille.

ValvesandControlsRemoval.Gear

ed invehicleasshowninFig. 156.Fig.

orgearbilge pumpsystem.Beforere-

tionthereofis attemptedpositionofunits

showsrelativepositionsof units,hose

gclips.Ifcompletesystemistoberemoved,

attainedbyopeningenginecompartment

allfloorboardsandair intakegrilles.

oorBoards

tValveControl

veControlRod

alveControlRod

ontrolRods

ValveControlRod

ontrolValve

dship

hip

Rear

tRear

ControlValve

htRear

nt

es

ntControlValve

trolValve

htRear

nt

foldMounting

Drum


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ON,6x6

itsofsystem,referto Para.66for

mentintakepipesandstrainer

ections:oneinenginecompartment,

underdriver'sseat. Loosentwo

ustration,Fig.156. Removetwo

strainer.

partmentintakepipesandstrainer

ections:oneatfrontofleftrear

rcontrolvalveunderdriver'sseat.

tedasshowninFig.156.Removetwo

strainer.

artmentintakepipesandstrainer

nnections:twonearleftrearwheel-

olvalveunderdriver'sseat. Remove

edasshownin Fig.156.Remove

peandstrainer.

partmentintakepipesandstrainer

ections— onenearcenterofcargo

ontrolvalveunderdriver'sseat.Re-

gpipestoframeside railandfloor

ctionsofintakepipeandstrainer.

gepipe

ections:oneathulloutlet,andone

mp.Removecurvedsectionofpipe.

ervoirandpipes

movingbolts,attachingseatbottom

seconnectionbetweenreservoirout-

driver's seatbox.Disconnecthose

omofreservoirandcontrolvalvemani-

ethoseatbottomof reservoir.Then

at boxtoremove.

vesandrods(Referto Fig.157)

owerendsoffourcontrolrods and

rcontrolvalvebracketmounting

alves,manifoldandmounting

canberemovedas anassembly.

hoseandstrainer

washersattachinginnerhalfof

toouterhalfwhichis weldedto

atedinsideofhull,belowandat left

nerhalfofstrainer withhoseas-

betweenhalvesofstrainer.


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ARTS

ValvesandControlsInstallation

sand rods(RefertoFig.157)

dmountingbracketassemblyinposi-

rail andinstallfourmounting

stallendsof fourcontrolrods

owninillustration andinsertcotter

voirand pipes

lacethroughholein seatboxbot-

petogear bilgepumpintakewith

onnectinghosebetweenbottomof

esmanifold.Placedriver'sseaton

attachingseatbottomtoseatbox.

se andstrainer

includingscreen)in position

erwhichis weldedtosideofhull

sseat.Putnewgasketinplacebe-

stallsixbolts, nutsandwashers

necthosebetweeninnerhalfof

of reservoirwithhoseclamps.

pipe

peinpositionbetweenpumpoutlet

ectinghosesateachend ofpipe.

pointofpipeis shutoff.

artmentintakepipesandstrainer

egripesandstrainerin properloca-

e connectinghoses,onenear

entandonenearcontrolvalveunder

reeclipsattachingpipes.

rtmentintakepipesandstrainer

kepipesandstrainersin proper

g.156.Installthree pipeconnecting

heelhouse,andonenear control

Assemblefourclampsandclipslo-

56.

tmentintakepipesandstrainer

epipeandstraineri nproperloca-

6.I nstalltwopipeconnectinghoses:

eelhouse;andonenearcontrol

Assemblethreeclampslocatedas


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ON,6x6

entintakepipesandstrainer

epipesandstrainerin properloca-

. Installtwopipeconnectinghoses:

nt,andonenearcontrolvalveunder

oclampslocatedasshowninFig.

airintakegrille

s compartmentandcargocompart-

ereremovedforaccessibilitytopipe

ectionsofair intakegrillewhich

necompartmenthatchcover,swing

onincoverclampsandtightenwing

ely.

EPUMP,DRIVEANDPIPING

andDriveRemoval.Pumpdrivecon-

vesproketinwaterpropellerdrive line,

pumpshaft.Pumpismountedon chassis

stablebracketbelowfrontcentersection

efertoFig.152.

ontcentersectionsof cargocom-

umpoutletand disconnecthose.

untingbolts,nutsandwashers.Move

vedrivechainfromgears,andlift pump

move.

engear onpumpshaftandremove

kestrainerisattacheddirectlyto pump

pump.Removeintakestrainerfrom

ewandpulling offstrainerassembly.

kindrive chaininordertoremove

rocketanddriveshaft.Drivesprocket

esatrearof frontwaterpropellerdrive

iatewaterpropellerdriveshaft.Removal

Para.237.

andDriveInstallation.

waterpropellerdrivelineasde-

ve chaininplaceonteethof drivesprocket

nchain.

ndkeyon endofpumpshaftand

.Installintakestraineronpump intake

gbracketin positiononframeside


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ARTS

gbolts, nutsandwashersloosely.Connect

hten hoseclampbolts.

pwardsufficientlytoput drivechain

rivengear.Thenslidepumpandmounting

eupslackindrivechain.Do notadjustchain

mpmountingbracketboltstoclamppump

ntcentersectionsofcargocompart-

PipeRemoval.Sincetheonlypump

directlytopumpintake,pipe systemcon-

.Referto Fig.156.

onofcargocompartmentfloorboards.

ddisconnecthosesatbilgepump out-

rdischargepipe.

nowloose andcanberemoved.Upper

oside ofhullandoutletfitting inhulland

PipeInstallation

pein positionbetweencentrifugal

chargepipe.

andclampsateachend ofpipeand

ely.

nofcargocompartmentfloorboards.

n pumpoutlets

mps,thendisen-

allowingpriming

mps.Engageclutch

umpasdesired.


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GES

yreplacement220

acement221

s,asillustratedin Fig.158,areinstalled

panel,mountedonleftsideofwindshield

eringcolumn.Theinstrumentpanel,with

s,canberemovedor installedascomplete

entorgaugecanberemovedandinstalled

ASSEMBLYREPLACEMENT

val

ptinganymaintenanceorrepairon

sconnectatleastoneterminalatbattery.

tremovetemperaturegaugethermal

dremovethrottleand chokewiresfrom

partment,backofinstrumentpanel,re-

anel

tch

ton


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GES

ionsfromterminalonbackofinstruments

romtopofspeedometerbracketand

p.Removenutandwiringharnessclipfrom

gaugebracket.Disconnectoilgaugeflex-

ressuregaugebybackingoffflangenut.

asherfrominstrumentpanel tosteer-

e3bolts,nutsandlockwashersattaching

hieldlowerpanelassembly.

nelassemblybywithdrawingtem-

nit,handchokecontrolwireandflexible

rolwireandflexiblehousingthroughopen-

ation

tplacepanelinposition inwindshield

dfastenwith3bolts,nuts andlockwashers.

osteeringcolumnbracewithbolt,washer

panelattachwiringharness clipto

acketwiththumbnut.Fastenwiringhar-

erbracketwithclip,washerandnut.

oinstrumentandgaugeterminals

asshowninFig.99 (SectionXVIII).Be

dby tracercolorareattachedtoterminals

blelineto backofoilpressuregauge

peedometerdrivingcabletobackofspeed-

ut.

ireandflexiblecable,throttlecontrol

temperaturecontrolterminalplug

nuppertoe board.

tplacetemperaturegaugeterminal

eandfasten withattachingnut.

ttlecontrolwireandflexiblehous-

ter.Threadendof wirethroughendof

dofcontrolflexiblehousingsecurelyin

ningclipclampbolt.

ollaronend ofthrottlecontrolwire

Foradjustmentofthrottle controlsee

ntrolwireand flexiblehousing

continuingendofwirethroughchoke

fflexiblehousingin clipwithsetscrew.


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TON,6x6

kecontrolleveratcarbureterwithset

djustmentseePara.203.

AUGEREPLACEMENT

tinganyreplacementofinstruments

eterminalwireatbattery,otherwiseserious

moval

rombackofspeedometerheadby

move2wingnutsfromspeedometerhead

essclipfromupperspeedometerheadbolt.

mpoffspeedometerheadbolts.Remove

hingfrombacktofrontinstrumentpanel.

allation

adinpositionininstrumentpanel by

strumentpanel.Onbackofinstrument

headbracketintwoboltsinspeedometer

erandwingnut onlowerbolt.

pon upperspeedometerheadbolt

dwingnut.Attachdrivingcableto center

terheadwithswivelnut.

ableRemoval

t,atbackofinstrumentpanel,re-

gcablefromspeedometerheadbyunscrew-

nectiononspeedometerhead.Remove

andwasher.Removecabletodashgrom-

tfromspeedometerdrivingcable.

tremovecabletotransmissionclip,

ovecabletomastercylinderclip,bolt,nut

etosecondcrossmember,clip,bolt,nut

velnutattachingcableassemblytospeed-

ansfercase.Withdrawspeedometerdriving

oardintoengine compartment.

ableInstallation

t,threadendofspeedometerdriving

elnut,throughuppertoeboardto instru-

riving cableintoendofdrivegear inleft

hten swivelnutsecurely.

ssionclip,boltnut andlockwasher.

ossmember,clip,bolt,nutandlockwasher.

nder,clip,bolt,nutandlockwasher.

tplacecabletodashgrommeton

onin uppertoeboard.Attachcableto

wivelnut.Attachcabletodash,clip,bolt,


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GES

gharnessclipfrom left-handam-

enutandwireterminalfromright-hand

ovenutandwasherfromrightammeter

meterclamp.

gefrominstrumentpanelbypushing

npositionin instrumentpanelby

anel.Onbackofinstrumentpanelplace

n ammetergaugeandfastenwithnutand

harnesswiringclip inrightboltand

r.Placewireterminalon rightboltand

r.

fuelgaugeclampbolts.Removewire.

movenutandwasherfromeachof 2fuel

movefuelgaugeclamp.Removefuelgauge

pressingthroughfromback.

tion ininstrumentpanelbypressing

efuel gaugeclampon2boltsi nbackof

nutand washeroneachbolt.Placeter-

d fastenwithnuttoeachbolt.

hing2wireterminalsat backofigni-

ationpliers,removeknurlnutfromignition

rumentpanel.Removeignitionswitch

panelfromfront.

on

positionin instrumentpanelby

ontof instrumentpanel,placeknurlnut

enwithcombinationpliers.Attachtwo

backofswitch.

val

esattachedtobackof mainlight

ontof instrumentpanelloosensetscrew

tandremoveknob.

onunder sideofswitchhousing.

ngplungeruntilhousingwillslip off

ovehousing.Removelocknutandwasher

vemainlightswitchassemblybypressing

mentpanel.


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ON,6x6

lation

hthroughinstrumentpanelfrom

thlocknut andwasher.

strumentpanel,placeswitchhous-

pressswitchlockingplungeruntilhousing

shousingfirmly againstfaceofinstrument

ninghexlockingnut inundersideof

mentpanelattach7wires toterminalson

ws.Terminalsonswitcharelettered.

ercolor.Referto SectionXVIII.

tchRemoval

esfrombackofB. 0.drivingswitch

nsetscrewholdingknobto switchpost

asherfromswitchpost.Remove

nelbypushingthroughfromfront.

tchInstallation

onin instrumentpanelboardfrom

panelwithwasherand locknut.Place

stenwith setscrew.Attach2wiresto2

.

moval

tto disconnectcapillarytubeorseal

gauge.Removetemperaturegaugether-

gby unscrewingnutatenginefitting.

koftemperaturegaugeclampplateand

ovetemperaturegaugebywithdrawing

hroughuppertoeboard andinstrument

tallation

roughinstrumentpanelandplace

mentpanel.Placetemperaturegauge

eraturegaugeandfasten with2nuts.

toenginecompartmentthrough

.In enginecompartmentinsertthermal

tightenholdingnut.

emoval.Allthreeinstrumentpanel

ypeandcanberemovedbythefollowing

eld,locatedoverlightin instrument

screwdriverunderrim ofshieldandgiv-

Removeinstrumentlightunitbyinsert-

tweenrimofunit andlightshieldbracket,

el,andgivescrewdriverlighttwist.


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GES

nstallation

light shieldbyinsertinglightshield

backofpaneland "snapping"shieldinto

all instrumentpanellightunitby"snap-

hieldextensiononbackofinstrument

moval

tloosenscrewincollaron endof

ndremovecollar.Loosencontrolwireclip

enclipscrewholdingthrottlewireflexible

wireclipat carbureter.Removenutand

ottlecontrolassemblyatinstrumentpanel.

blyoutthroughinstrumentpanel.

stallation

flexiblehousingthroughopeningin

washerandlocknutovercontrolwire and

ovedthroughpanel.

assemblytobackofinstrumentpanel

Threadwireandflexiblehousingthrough

ecompartment.Inenginecompartment

usingthroughclipat carbureter,continu-

dof carbureterrod.Attachendofflexible

erwithbolt, nutandwasher.

endofflexiblewireandfastenwith

ofstopcollaron handthrottlecontrol

moval

eterchokeleverswivel.Loosencon-

bureterendofflexibletubing.Onbackof

nutandlockwasherfromhandchokecon-

ontrolassemblybywithdrawing

allation

flexiblehousingthroughopeningin

ockwasherandnutovercontrolwireand

ovedthroughpanel.Fastenhandchoke

mentpanelwithlockwasherandnut.

flexiblehousingthroughhole in

ecompartment.Inenginecompartment

usingthroughclipat carbureter,continu-

okeleverswivel.

ousingto clipatcarbureterwithset

nchokeleverswivel.Foradjustmentof

Para.203.


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INGAXLE

emaintenance224

semblyreplacement225

eplacement226

acement227

alreplacement228

es.(Fig.159).Atotalof sixpropeller

ntransmittingpowerbetweenmaintrans-

ngaxles.Eachshaft assemblyconsistsof

aftwithaslip jointtopermitlengthwise

ersaljointsateachendto permitmove-

eshaft.

ssemblies.Thepropellershaft

aintransfercasetofrontaxle,toforward

kare eachencasedinaseparatetubular

.159).Eachhousingis attachedatone

hingeandsyntheticrubberbellowsand,

rentialcarrierorpillowblockbya support

ws.Thesehousings,withbellowstypeseals

o preventleakageofwaterintohull.No

ershaftbetweenpillowblockandrearward

G

sorvibrationsaregenerallythe first

ditionsindrivingaxlepropellershaft

forereplacingapropellershaft,becertain

eingcausedbypropellershaftandnotby

rboards,etc.Failureofpropellershaft

videncedbywaterleakageduringwater


ation

ews227

Disconnectshaftatslip

intandr eassemblewith

sameplane226

ts...SectionVI


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INGAXLES


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ON,6x6


sor

haftassembly..226

Replaceshaftassembly..226

t

rings227

orn

ngs227

Tightenclamps228

lk-Tightenthe12nuts on

e.eachofthe threeretainer

cedefectiveseal...228

placedefectivehousing225

ENANCEANDINSPECTION


accomplishedatintervalsindicated.One

sin preventivemaintenanceofpropeller

tionofpropellershaftsealsat thehousing.

ft,flangebolts anduniversaljoints

arintervalsandattachingboltstightened.

OUSINGASSEMBLY

ofthepropellershafthousingassem-

eandfrontaxleor betweentransfercase

resdisconnectinghousinghinge,removal

peseals ateachendofthe housing,slid-

hullas faraspossible,looseningbaffle

ectinghousingsupportfromdifferential

pellershaftatuniversaljointataxlepin-

dof shaftandhousingdownwardsaway

awinghousingassembly.Toremove

caseandpillowblockitis necessaryto

euntilrearaxleassemblyhangsfree.With

ngmaybe replacedbyfollowingapro-

ribedforthe othertwoaxlepropeller

ousingToFrontAxleOrToForward

housing

ewsandwashersfromhingeat hous-


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INGAXLES

tbottomof housingandoneis

sing.

mprings

patendofrubberbellowson propel-

vetheclamp.

wayfromaxleandthroughholein

araspossible.Donot pinchordamage

operation.Pullsealat axleendoff

oint

ockwashersfromthetwo"U"bolts

oint ataxlepinion.Push"U"bolts

ectingpropellershaft.Donotdrop

softhejoint when"U"boltsare

apearoundthe trunniontohold

boltsare removed.

rshaft

ryokeat axleendofpropellershaft

ellershaft,awayfromaxle end.

pport

wsandwashersattachinghousing

capto axledifferentialcarrier.

ainingcapscrewswhichhold only

mbly

niscompleteddrophousingandpro-

d sohousingmaybepulledforward

gassemblyfromvehicle.

HousingToFrontAxleOrToForward

ft

ershaftfromaxleend. Besureend

latesaretowardshull andreinforc-

de housingthroughrubberbellows

einhull asfaraspossible.

ts


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ON,6x6

ort

tand housingassemblyintoposi-

verend ofpropellershaft.Then

fferentialcarrierwith thefour

washersandtightenscrews.Besure

dendofsupportbeforescrewsare

otenoughfree movementatshaft

gshaftintoalignmentwithaxle

lled.

holdingtheneedlebearingassemblies

onsand holdbearingsinplace

topositionso thatbearingcages

pinionshaft.Then installthetwo

shersandtightennutsonthe "U"

lershaft

aftclosetoend ofshaftandtighten

mlyinposition.

ng

housing supportatdifferential

ftas necessaryuntilholesintap-

ndbottomwilllineup withcorre-

senewlockwashers,installthethree

g

axleendof housinguntilstraight

ingcrimpedinhousing.Workbellows

positionandinstallclampring.To

gstrap aroundstraightportion

ge ofstrapisbeyondcrimpin hous-

hroughslotinnut andpullstrap

henbenddownflat.Tightenclamp

ousingToPillowBlock)

icle

talljacksunderspringtrunnion

evehicleonjacksuntilaxleassem-

acksareinstalled sothatthey

eto fall.Vehiclemustbejacked

groundtopermitremovalofthe

upportonfront endofpillowblock.

mbly

giveninPara.225b.,operations(1),


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INGAXLES

tthatendofhousingis raisedand

ofaxlehousing.

y

ra.225a.,operations(1),(3),(5)

vehicleonjacksandremovethejacks

heels.

SSEMBLYREPLACEMENT

tassembliesbetweenwaterpropeller

etransmissionor maintransfercasemay

oorboardsanddisconnectingflangesat

ofshaftsfrommaintransfercasetofront

pillowblockrequireremovalof floor

versaljointsanddisconnectingpropeller

eenpillowblockandrearwardrearaxle

nnectinguniversaljointsateachendof

aftsbetweenwaterpropellertrans-

nsmissionorthemaintransfercase.

ytofrontofwater propellertransfer

eftsectionofdriver'scompartment

ttachcentersectionandfiveattach

rearofwaterpropellertransfer

rcentersectionofair intakegrille

oved.

ointflanges

flangesfromcompanionflanges.

rsandboltsfromuniversaljoint

ellershaft assembly.

tassembly

opellershaftassemblyfromcom-

shafttogetheratslip joint.Then

ehicle.

Shaftbetweenwaterpropellertrans-

nsmissionorthemaintransfercase.

g

splinedslip joint.(SeeFig.161and

f theshaftareassembledatthe slip

kesat eachendmustbein thesame

ndfemaleportion oftheslipjoint

ksarenot inline,loosenthedust

nt,pull shaftapartatjointand


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ON,6x6

ne.Becertainsplinesare lubricated

otdamaged.Afterjointi sreassem-

ghtenthedustcapfinger-tight.

sitionbetweencompanionflanges

propellertransfercase(ormain

opellertransfer).Theslipjoint

wardsfrontof vehicle.Insertfour

nionflangeanduniversaljointflange,

ndtightenalternatenutsuntilall

grille

onof driver'scompartmentfloor

air intakegrille,whicheverwas

dfloorboardwithfivescrewsand

rscrews.Thecentersectionofair

edinplace.

aftsbetweenmaintransfercaseand

e,orpillowblock.

rtmentfloorboard

nofcargocompartmentfloorboards

saljointsat themaintransfercase.

maintransfercase

sfrom"U"boltsattachingcompanion

fttouniversaljoint trunnionon

efront orforwardrearaxle.Wrap

dneedlebearing assembliesin

e removed.Disconnectshaftbe-

lowblockbyremovingfourbolts

geandshaftuniversaljoint flange

tassembly

thousinganduniversaljointfrom

uctedin Para.225.Donotwith-

yfromvehicle.Withdrawpropeller

ng,pullingitoutfrom axleendof

Shaftsbetweenmaintransfercase

raxle,or pillowblock.

g

assembledsoyokesateachend

meplane.SeeinstructionsinPara.


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INGAXLES

dviewofpropellershaftanduniversal

weenmaintransfercaseandfront axle,

wardrearaxle,or pillowblockandrear-

ring

sembly

ghpropellershafthousingwith

mblytowardstransfercase.Then

xleorpillowblockand replace

nstructedinPara.225.

ercase

nsfercaseendof propellershaft

haft.Followinstructionsin Para.

ntorforwardrear axlepropeller

nt.universaljointofpropellershaft

maintransfercasetoflangeon trans-

s,nuts andlockwashers,tightening

tmentfloorboard

oorboardinplaceincargocompart-

opellershaftassemblybetweenpillow

xle.

oints

ockwashersfromthetwo"U"bolts

runnionstoflangesat pillowblock

Driveout the"U"bolts,being

edlebearingassembliesfromtrun-

y

hafttogetheratslip joint,thus

sfromflanges.Removeshaftassem-


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ON,6x6

apearoundtrunnionsto hold

ingsinplace.

Propellershaftassemblybetween

rearaxle.

g

assembledsoyokesateachend

ane.Followinstructionsgivenin

sembly

sitionbetweenflangesonrearof pil-

rearaxle drivepinion.Slipjointend

lowblock.Removetapeor wrap-

niversaljointtrunnion atoneend

nplacewith fingers.Insertthetwo

iontocompanionflange,install

enutson"U"bolts.Tightenalter-

procedureat oppositeendofshaft

EMBLYREPLACEMENT

owblockassemblyrequiresdiscon-

usingandpropellershaftfromfront end

tingpropellershaftfromrearofpillow

apscrewswhichattachpillowblockto

earaxle housing.

llowBlockAssembly)

haftandhousingfromfrontend of

Para.225d.

haftfromrearofpillow block

.226f.,disconnectingshaftat

ndlockwasherswhichattachpillow

gandremovethepillow blockas-

eeFig.163).

se

omoutsideofpillowblockassembly

e.

tflanges

fromeachendof pillowblockshaft

gesoff ofshaftwithflangepuller

teachendofshaftand,at rearend,


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INGAXLES

ssembly

ousing

utLocks

fromkeywayandthefelt washer

thousingsupport

sandlockwasherswhichattach

dof pillowblock.Thenremovethe

l asanassembly.

oilseal assembly

dwashersatrearof pillowblock.

ndthecoverandoil sealassembly.

alis locatedinthepropellershaft

pillow blockandoneislocatedin

k.Bothare stakedinplacewith

Toreplaceeitherseal proceedas

ngsupportorrearcoverusingoil

45.

arksusedto retainseals,usinga

s smoothandcleanbeforein-


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ON,6x6

compoundtooutsidesurfaceof

ousingsupportor cover.Apply

erycarefulthatnocompound

itself.

supportorinrear coverusingre-

eninstallingsealinpropeller

alldiameterofsealmust be

ort.Wheninstallingseal inpillow

meterofsealmustbe towards

r.Aftersealis drivenintoplace

equallyspacedpointswithprick

earingReplacement

tingnut

ngsupportandpillowblockrear

replacement(seec.above),bearings

edforinspection.Bendtangsof

earinglocknutandadjustingnut

removelocknut,bothlockwashers,

gnutwasher.

aft

hsoft-facedhammer,drivingshaft

block.Frontbearingconeisaloose

nincup.Rearbearingconeis a

emainonshaft.Bothbearingcups

mcupin pillowblock.Removerear

puller.Cleanandinspectbearing

notremoveunlessdamagedorworn

drivecupsoutofendsofblockwith

344B.Tapalternatelyonopposite

meoutwithoutbecomingcockedin

sasfollows:

gfluidsuch ascleangasoline,

strikelargerside ofbearingflat

ockoutheavierparticlesof dirt.

ddrywithcompressedair,directing

efulnotto spinbearings.

byhand,andinspectrollers and

ssivewear.

aringsinengineoil andwrapin


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INGAXLES

ved,driveonecupinto eachendof

rKM-J-2344Auntilseatedsolidly

nstallrearbearingconeon pillow

riverKM-J-2343.Drivebearing

shaft.

bearings

ace onshaft,installshaftfrom

ateandinstallfrontbearing cone

ng intoplaceinfrontbearingcup.

randadjustingnut onshaft.If

ovedfromshaft,orif eitherofthe

pillowblock,tightenadjustingnut

aringsareseatedproperly.Then

permitshafttospinin bearings.

bleendplay,however,whenbear-

ntinstalltwonewadjustingnut

adjustingnutlocknut.Tightenlock-

angebearingadjustment.Check

endplaybutstill turnsfreelyafter

endtangsoflocksover flatsonnuts.

ousingsupport

endofpillowblockandinstall the

pportandoilseal assemblyonfront

wstypehousingsealmustbe in

pportisattachedto pillowblock.)

usingnewlockwashersandtight-

cover

fpillow block,installthecoverand

pacer.Attachto pillowblockwith

ockwashersandtighteningscrews

erisinstalledbetweencoverflange

.163.)

nges

ar endofshaft.Placekeysinkey-

Applysealing compoundtokeyways

haft;pressnewcorkseals intokey-

mpound.Installpropellershaft

sliding hubofflangethroughoil

tainouterportionofseal isnot

whileinstallingtheflange.Install

shaft,tightensolidandlockin place


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ON,6x6

PillowBlockAssembly)

deof bracketontopofforward

fthousingsupport towardsfront

rcapscrewsusingnewlockwashers.

tatrearof pillowblock

frontendof rearwardrearaxle

rear ofblock.(SeePara.226g.)

tandpropellershafthousingat front

keonrearofpropellershaft between

ocktoflangeat frontendofpillow

pellershafthousing.Para.225e.

OUSINGSEALREPLACEMENT

ofrubberbellowstypesealsataxle

eller shafthousingsrequiresdisconnect-

jointsat axleorpillowblockendsand

housingsupport.Replacementofseals

srequiresremovinghousingsfromvehicle

rringswhichattachsealsto bulkheads.

alsatFrontorForwardRearAxle

dpropellershaft

wardrearaxlefollowinstructions

1)through(6).Do notremove

hicle.

pringattachingsealtodifferential

dpullsealawayfromcarrier.

SealatFrontorForwardRearAxle

toflangeofaxledrivepinionbearing

paroundstraightportion ofbellows

reeend ofstrapthroughslotin

hapair ofpliers,thenbendfree

pscrewanddrawup tight.

tandhousing

dconnectpropellershaftandpro-

as instructedinPara.225c.

alatPillowBlock

dpropellershaft

thousingandpropellershaftfrom

ccordancewithinstructionsinPara.

ousingfromvehicle.

ort

okefromfrontofpillowblockshaft


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INGAXLES

thousingsupportandsealassembly

si nstructedinPara.227c.

singsupport

trearofhousingsupport.Then

flangeonrearofhousingsupport

SealatPillowBlock

support

dof propellershafthousingsupport

ardslargeendofsupport.Work

geonendofsupport.Theninstall

c.,operation(1).

on pillowblock

ndsealassemblyonfrontendof

pellershaftyokeon frontendof

ctedinPara.221 A.,operation(7).

ropellershaft

iversaljointatfrontof pillowblock

thousingasinstructedin Para.225e.

alsatBulkhead

thousing

propellershafthousingtohullbulk-

opellershafthousingassemblyas

notnecessarytodisconnectpro-

rcaseend.

ngandseal

nofcargocompartmentfloorboards

tsandlockwashersfromstudson

Whilestill insidehullpushonstuds

seal. Thenremoveretainerring

l bulkhead.

SealsatBulkhead

onseal

roughthe retainerringwithring

al.Moveringintoposition onseal

esin seal.

head

tside ofhullbulkheadwithretainer

.Installnutsandnewlockwasherson

etightenall nutsfingertight,then

des alternatelyuntilallaretight-

mbly

mblyasinstructedinPara. 225.


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RIVE

andinspection232

e233

nt235

ent236

ent237

eplacement238

ent239

t240

ION

eincludeswaterpropellertransfer

ustbearingatrearaxle trunnioncross-

utbearing,andwaterpropeller.Location

wninFig.164.

rCase.Waterpropellertransfer

pellershaftpowertake-off,consistsofa

ftsfortransferof powertomaintransfer

p,andwaterpropeller.

y.Thrustbearingassemblyconsists

ng,tworetainers,twospringloadedoil

adedbearingcap.The tworetainers

aringcapandabolt.Outersurfaceof re-

ofhousingare sphericalinshapeto

gthrust bearingwithwaterpropeller

tin housingisprovidedtoclampre-

ringsare inalignment.

oxassemblyaroundrearwaterpro-

using,two bushings,apackingnut,a

hitecordpacking.

engagedor disengagedbyraising

nobatright ofdriver'sseat.Controlrod

ftin coverofwaterpropellertransfer

ndlinkagemountedatrear oftrans-

opelleristakenfrom upperrearflange

opellershaftstopropeller.Driving thrust

heldtoshaftwithtwotaperedpins,


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RIVE


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ON,6x6

bly.Transfercaseisconnecteddirectly

smissionratiosare availablealthough

speedhigher thanthirdbeused.

G

counteredinwaterpropelleranddrive

tonoisy operationsoftransfercaseand

evibrationinpropellershaftsorhard

oiseinpropeller shafts


39

acebearing240

ed

earing238

placeshafts237

eshafts237

oseTightenbolts andnuts..238

ollowrecommendedpro-

spect,cleanandlubri-

placerods236

nsfercase

als NotifyOrdnance

acegaskets234

ENANCEANDINSPECTION

ntinspectionandmaintenancepro-

djustmentandinspectionofwaterpropel-

adetoParas.233and 239fordetailson

TENANCE

bricatedat intervalsasdirectedin

ampsateachend ofhosebetweenstuf-

ttunnel aretight.Packingnut-should

eventseriouswaterleaksbutnotso

ox tobecomeoverheated.

Fig.165).

tersectionof cargocompartment


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RIVE

erStuffingBox

over sideboardsinorderto gain

osenlocknut,tightenpackingnut

ut.If leakdoesnotstop,waita

/6 turnmore.Whenlimitofadjust-

nutbottomsonstuffingboxhousing)

isfreeofstuffingbox andreplace

ENT

thelowershaftsof thewaterpro-

ereplacedafterpropellershaftflanges

emoved.Oilsealsat uppershaftareac-

okeateachend ofshaftareremoved.

replacementcannotbeaccomplished

ershaftisremovedandthrust bearing

shaft.

enancepersonnel.

PLACEMENT

casemaybelifted outofvehicle

eningafterpropeller shafts,shiftcon-

eltareremoved.

nfloorboardandairintakegrille

driver'sfloorboardandair intake

esstotransmissiontotransfercase

tsfromwaterpropellertransfercase

ransfercase

joint.Removefourboltsandnuts

fpropeller shaft.Separateflangesbypush-

ointandliftpropellershaft outofvehicle.


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ON,6x6

rpropellershaft

nPara.237b.

pumpdrivepulley

ngbracketboltsandslidepumpand

centerofvehicletoslackenbelt.

ercontrolrodfromshiftershaft

removingcotterandclevispin.

swhichattachtransfercaseto

at uppersupportthenlifttransfer

grille opening.

onProcedure

enflangesoflowersupportandin-

hichattachcasetosupport.Then

casetouppersupport.Connect

toshiftershaft usingacotterand

stogetheratslip jointandplacein

nfourbolts andnutsinflangesat

ten dustcapatslipjoint. Install

directedinPara.237c.

umpdrivepulley

p drivebeltasdirectedin Para.

REPLACEMENT

casecontrollinkageisaccessible

er'scompartmentdoorboardisremoved.

tableandany bentordistortedparts

edure

ontrolrod

hiftershaftandcrossshaft shift

ndclevispins,thenremoverod.

dshiftlever

everand movelevertowardscenter

posekeyin shaft.Removekeyand

and outersidesofleft-hand

.

tstabilizerrod

abilizerrodatleft-handcrossshaft

erandclevispin.


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RIVE

ckets

everatpowertake-offshiftershaft

evispin.Removecotterpinat end

nsmissionstudand removelever

chattachesleft-handbracketto

cketoffstud.Removetwonuts

kettotransmission,loosenhand

s,andremovewaterpropellercross

cedure

ets

overforwardstudunderhandbrake

tallstudnuts. Installleft-hand

smissionwithnutoverforward

ertotransmissionstud.Placewinch

attachto powertake-offwithcot-

owerplantstabilizer rodtoleft-

ndclevispins.

shiftlever

andbracketwithkeywayendof

hicle.Insertkeyinshaft,install

inleft-handbracketwhenkeyin

rein alignment.Installhairpin

ndendof shaftandtightenclamp

centeredoverkey.Attachcontrol

sfercaseandshortarmof shift

evispins andsecurewithnewcotter

EPLACEMENT

andrearsectionsofpropellershaft

dently;however,itisnecessarytounbolt

ramebeforeintermediateandrearshafts

RemovalProcedure

oldrearwardyokeandbilgepump

angeofintermediateshaft.

vesprocket

s possibletoseparateyokeand

umpdrivesprocket.Raiserearend

earforwardbearingandpullshaft


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ON,6x6

InstallationProcedure

eofyokeatforwardendofshaftto

cksorburrs whichwouldimpair

oilseal.Placeyokeoversplinesof

ndslideyokeonto shaftasfaras

sprocket

approximateoperatingpositionand

ocket.Seethatshoulderon sprocket

ntermediateshaftand installfour

ketandflanges.Replacelockwashers

yokeandflangetogether.

ShaftRemovalProcedure

earingassemblyfromcrossmember

swhichattachforwardbearingas-

mber.

nge

swhichattachforwardflangeto

andyokeofintermediateshaft.

rwardandremovebilgepumpdrive

tguard

rsideoftrunnioncrossmember

ftguardtocrossmemberandre-

t

swhichattachrearyoketo flange

eshaftforwardfarenoughtosep-

ift propellershaftandforward

ehicle.

ShaftInstallationProcedure

itionwithforwardbearingassem-

yoketoflangeofrear shaftusing

shers.

e

ftwithyokeat rearofinterme-

pumpdrivesprocket.Seethat

rsgrooveinflangeandinstall four

ketandflange.Replacelockwashers

yokeandflangetogether.

tocrossmember

lockwasherswhichattachforward


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RIVE

nsertpropellershaftguardthrough

berandinstalllowernuts andlock-

movalProcedure

er

sdirectedinPara.239b.

assembly

semblyasdirectedinPara.238b.

fingbox

ampwhichattacheshosetorearend

5).

t

owardsleftsideofvehicleandpull

approximatelyfifteeninchesto

aring.Thenraiseend ofshaft

tunnel.

allationProcedure

eofshaftcollartoseethat itisfree

mightimpair efficiencyofthrust

dedend ofshaftthroughhosecon-

ewheninsertingshaftthroughstrut

do notscratchbearingandslide

eratingposition.

d waterpropeller

mblyasdirectedin Para.238c.In-

ctedin Para.239c.

SSEMBLYREPLACEMENT

yreplacementcanbeaccomplished

ediatepropellershaftis disconnected.It

atbearingbeadjustedas outlinedin

ssemblyisinstalled.

yRemovalProcedure

tepropellershaft

chingforwardbearingtocross-

datrearof intermediateshaft.

nutswhichattachrear yoketo

dfarenoughtoseparateflangeandyoke

tsideof vehicle.

ge

moveflangeretainingnutusing

oveflangeusingpullerKM-J-1714to


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ON,6x6

assembly

ngassemblytocrossmemberand

yInstallationProcedure

ngcap

setscrewandloosenbearingre-

ersideofhousing.Thisis doneto

nitself withstrutbearingwhen

t.

y

untilbearingstrikesshaft collar

endofshaftanddrawflangeretain-

ithnewcotterpin.

apuntiltight,then backoffone

screwintopofhousing.Install

nut.Turn retainerpositioningbolt

g)down tightandinstallfour

utswhichattachbearingassembly

propellershaft

trearendof shaftusingfourbolts,

thenboltforwardbearingsupport

EPLACEMENT

mentisrecommendedwheneverpro-

asanyirregularityinsurfaceof propeller

ration.Instructionsasoutlinedbelow

lywheninstallinganewor reconditioned

alProcedure

of shaftandremovelocknutand

61)overpropelleras shownin

extendingthroughpullerplate

meuntilpropellercanbepulled

ionProcedure

yand installpropeller

slipfitin keywaysinshaftandpro-


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RIVE

aferPropeller

cekeyextendsoutofshaftand

erhub.Thereshouldbe .010"clear-

ndbottomofhub keywaytomake

ftand notthekey.Startwaterpro-

thkeywaysinshaftandinhub

eronshaftas faraspossible.Insert

eyandpropellerinto positionby

htennutuntil propellerisseated

and installlocknutandcotterpin.

LACEMENT

ttbearing,pouredwithshaftassem-

ntofbearingisnecessarywhenevershaft

eshouldnotbeattemptedbytheUsing

nnelasthisprocedureisbeyondthescope


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andinspection243

cement244

245

46

djustment247

48

nce249

ent250

ION

escribedinthisgroupinclude

mountings,reboundclips,torquerodmount-

shockabsorbers,andattachments.The

semi-elliptictype.Leavesareheldto-

psand properlylocatedonspringseatby

springshasaneyeformedat each

shing ispressed.Thirdleafis alsowrapped

pringis mountedinshackle,whilerear

instationarybracket.Rearspringsare

ewithcenterofspringheldto springseat

at iscarriedontrunnioncrossshaftby

dsofspringride onaxlehousingandare

ckwardtopermit springtolengthen

mpressionandreboundaction.

nthisvehicleatfront springsonly

tingtypei nterconnectingframeandaxle.

G


LubricateSect.VI

cketRemoveandcleanor

adtoratedcapacity....7

nCorrectloadingpractice.


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ause

bsorbers

erating

is-

s in

nting

gsloose

frozen

VI

VI

ENANCEANDINSPECTION

nanceitemsareimportant:

houldbedrawnup tightenoughto

wear.Shacklesshouldnotbedrawnuptoo

nofshacklebolt orpin.Drawupnuts as

ckoffone halfturntopreventbinding.

sfullsize ofhole.

uldbe kepttightatalltimes.

frontspring axleandrearspring

ht undernormalspringload.

edrawnup tightenoughtoholdleaves

ctingfreemovementofleaves.

acklesandbracketsshouldbeper-

articularlyafterextensivewateroperation.

cation."

mostofresiliencyorelasticproper-

acethemwithnewones,ratherthanat-

mberbyheating,bendingand tempering.

of torquerodsshouldbekeptclean

ases.


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ON,6x6

stallation

REPLACEMENT

gs.167,168,and169)

ofvehicleuntilspringtension iscom-

rwheelstokeepvehiclefromrolling.

dshacklepins

removeshacklepinclampbolts,

toolKM-J-2310asshowninFig.169

acklepins.Greasefittingsshouldbe

cleanedandinspected.

anedandinspected.Aleadhammer

acklepinsinplace.Becertainthat

operalignment.

d clampbolts

sechannelisnot cloggedandthat

encleanedbeforethreadinggrease

mpboltsshouldbe lubricatedwitha

l beforeinserting'intoplace.Be

ein shackle,andclampboltgroove

eralignmentbeforeinsertingclamp

mpboltsusing lockwashers,nuts.


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hackleandBracket

et

lePin

Bushing

ePin

et

ACEMENT

tnuts.This operationwillremove

gtoseat anddisconnectshockabsorber

epin.FollowinstructionsinPara.244

klepins.

slottedhexnut, andusetoolKM-J-

ovespringassembly.

tshouldhave greasechannelcleaned

theknurledshoulderofbolt isinalignment

eleadhammerto driveboltinplaceif

hexnutonboltand aligncotterpinhole.

nstallshacklepinandclampboltas de-

blockinposition,insert"U"bolts

sorberlinkinpositionand threadnutson


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ON,6x6

emoval

NT

ocedure(Fig.170).Rearsprings

ectedandadjusted.Todothis properly,

dfromchassisasfollows:

nnectsprings

fttoframebracketandraise to

movefournutson"U"bolts andre-

block.Loosenspringseatclamping

s seatuntilfrontendcan belifted

stallation


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eat

tandStud

xle.Pullspring forwarduntilrear

wardaxle.

Procedure.Installationofrear

omplishedwithoutchangingpositionof

cketonforwardrearaxleandslide

ofspring willclearbracketonrear-

ardrearuntil centerboltdropsinto


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ON,6x6

eatBearingPuller

espacerin positionontopleafof

andaligned properly—threadnuts

mpingcapscrews.

EARINGADJUSTMENT

s(Fig.171) mustberemovedand

tasdirectedinSectionVI ifsatisfactory

btained.Bearingsshouldbecarefullyad-

ccordingtothefollowingprocedure:

ringcap

inPara.246a.Removebearingcap

capscrews.

ockingnuts

stingnutlockandremovelocking

ustingnut,andadjustingnut

eattogetherwithouterbearingcone,

cup.

coneandseal

ng puller(Fig.172),removeinner

sealparts.

upsthoroughlywithkeroseneor

gclean,inspectthemcarefully.

aringrollersarepitted,theyshould

oneinwhichsmallparticleshavebroken

epressions.

seatsrollbackandforthas vehicle

n,butbearingrollersalwaysreturn tosame


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fact,bearingrollers restinthisone posi-

shedlinesappearonbearingcups,showing

ers.Theselines arespacedaccordingto

contactofeachroller.Theselinesare not

ldnotbereplacedunless surfacesofcups

en.

eresultingfromhandlingduring

ngandforsandor mudinsideofseal.Re-

nditionsexist.Soakbearingsinengineoil,

kbysqueezingchassisgreaseinbehind the

reasewiththe surfacesoftherollers.

easeto theshaftbetweenthebearingsso

egreaseinthe bearingssoftenenough

,oilsealfelt,oil sealwasher,and

Lubricatebearingsthenplacein

g seatoncrossshaftend.

washer

r,andadjustingnut(inner)over

suitablewrench,pulladjustingnut

ment.Springseatshouldbeoscillated

tgreasefrombeingsqueezedout

cap

hnutof convenientsizebrazedon

p)isto beinstalledonfaceofspring

pscrews.Puttorquewrenchon

equiredtomovespringseat.This

.lbs.

ndadjust

ightenorloosenadjustingnutto

tingeffortat thetightestplacewhile

uewrenchanddummycapare not

thodoftestingbearingadjustment

rtofaceof springseatandmeasure

aleat endofbar.Readingofscale

s.ifbearingadjustmentis correct.

enedproperly,replaceadjusting

uter).Tightenlockingnut securely.

etoseethatit hasnotbeenchanged

endtangsofadjustingnutlockover


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TON,6x6

ockingnut.Replacebearingcapand

espring—refertoPara.246.

ACEMENT

chside, connectrearaxlestoframe.

tocrossshaftbracketswhereasupperrods

stobracketswhichareboltedthroughhull

er.Bothendsoftorquerodsarerubber

astaperedmountingstud.Taperedstuds

mes.Rubberbushinginendsof rodsre-

exceptthattheyshouldbe sprayedwith

reventcrackingordeteriorationofrub-

gseatsand raiseuntiltensionis off

mtorquerods—forcetorquerodpinsoutof

ta clawbarbetweenbracketandhubof

ottomof bracketsharplywithaheavy

clawbar.Donot prytoohardorrubber

bedamaged.Proceedtoremoveupper

memanner.

romtorquerodpins, andseethatrub-

free fromoil,greaseordirt.I nserttorque

wolowerrods oneachaxleshouldbe

rodsare installed.Forcetorquerodstuds

odand aheavyhammer.Theninstalllock-

securely,lowerandremovejacks.

MAINTENANCE

uire specialattention,exceptperi-

eningoflinksandcheckingoffluid levels

hockabsorberfluidand checklevelatpe-

oceedingwithoperationonshockabsorber,

nsandshackles.Seethattire pressuredoes

ommended.Smootheroperationisobtained

tefreelyandtiresarenot overinflated.

ion

xleandpull shockabsorberarmdown.

yand thenstopsandcontinuesmoving

way,thereisnotenoughfluid inshock

sorberthoroughlyandremovefillerplug.

erfluid.Usefluid gun.


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moveshockabsorberarm upanddown

nto pistoncylinder.Theninjectaddi-

.Toprovidenecessaryairspaceinshock

apedowntobottomedgeof fillerplughole

placecapgasketswherevernecessary.

asherswhichhavebeenoperatingwith

ybecomewornandcauseleaksaround

canonlybe correctedbyreplacingshock

REPLACEMENT

ockabsorberarm.Removebolts

rtoframeandremoveshockabsorber.

rameand connectlinkbetweenshock

Wheninstallationis complete,checkall

arypaintabsorbersandfittings.Check

pinswell lubricatedandspringboltsand


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andinspection...254

255

kageadjustment257

t258

ement259

ION

hisvehiclecomprisestwosystemswhich

ingwheelandgear,draglinkandtie rodcon-

em;whereas,steeringwheelandgear,cable,

comprisewateroperationsystem.Steering

pe.Thisdescriptionrefersto ballswhich

wormandwormnut.

.173).Ruddercablespoolis heldto

thshear pin.Approximately50Ibs.pullat

edto brakethisshearpin.Ruddercableis

ofspool andretainedbyaclampand two

ned,movementistransmittedthrough

orshaftinsidesteeringgearthrough pitman

link andsteeringarmtofrontwheels.

wheelalsocausesruddercablespoolon worm

der-controlcable,thusactuatingrudder

ectionIII,"ControlsandOperation"for

rdingsteeringonbothlandand inwater.

G

ringsystemis closelyrelatedtoother

eneverdiagnosingsteeringdifficultiesother

bechecked.Asymptomindicatingsteering

ceofdifficultyinother units;i.e.,frontaxle

ension,tireinflation,wheelandtiremounting,

es.Symptomswhichindicatepossibletrouble

dbelow withprobablecause,probablerem-

graphsinwhichremediesareexplained.


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ause

orCheckandadjust worm

sand sectorgear

dCheckandadjustcorrect-

gAdjustmountings255

anStraightenpart,ifprac-

orreplace258

bricateasrequired,

ect.)VI

Replaceassemblyordrag

k 258

Adjustrudder cable259

ignfrontend andreplace

rnparts74

atetires288

ng control


gs,andsectorgear

Adjustifpossible,or re-

56

gsAdjustandtightenmount-

Replaceassembly258

c- Tightenpitmanarmlock

edAdjustwormbearings,see-

gear lashordraglink

essary255

Adjustruddercable257

ignfrontend andreplace

rnparts74


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TON,6x6


dtosteeringwheel

Checkandadjustcorrect-


dsectorgear

n-Tightenpartsandalign

nt end74

oseAdjustbearings284

to rightandleft

enpart,i fprac-

Adjustorreplacestops...74

lyAdjustrudderlinkage....257

ENANCEANDINSPECTION

eandinspectionoperationsasoutlinedin

mplishedaccordingtotheintervalsstated.

antinspectionandmaintenanceproce-

wormandsectorshaftbearingsasdirected

USTMENT

entsnecessaryforcorrectsteering

ringadjustment,outlinedinPara.255b.;

nt,Para.2.">c.andsteeringgearmounting

Steeringgearadjustmentprocedureisout-

vehicle.Howeverifgearisoutofvehicle

ewithgearin aviseasadjustmentpoints

e.

entProcedure

arlinkage

ustedin vehicleremovecotterpinfrom

uideclevispin (seeFig.173),and

ey,therebyprovidingslackincable.

esterncompartmentafterhatchcover

eelto rightandtoleft asfaraspos-

bleintoenginecompartment.Discon-


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7/27/2019 TM 9-802 GMC DUKW-353


Rudderlinkage

kfrompitman armbyremovingcotter

.

ntopreventbindingofshaft

tbracketextendingfromwindshield.

oltandnut attachingsteeringcolumn

et.Tightenboltsclampingsteeringgear

nderstructure.

earings

utandturn lashadjustercounter-

174).

o keepsteeringwheelinmotion

yeitherrightor leftasfaras itwillgo—

Caution:Approachendofgeartravel

connectedaswormnutinunitmay

scaleKM-J-544Atomeasurepull r


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

torGearLash

eelin motion.Scaleshouldbeusedat

linethroughlengthofscaleat right

eeFig.175.) Ifpullrequiredto keep

en1and 1^pounds,wormbearing

Fig.176)

ltsandendcover.Takeoutas many

ateall wormshaftendplaywhenend

tsfully tightened.

elrimpull

psteeringwheelin motionasoutlined

fnecessarytoobtainproper pull.

dgearfeels lumpywhenturning,

dgearmustbe replaced.

mentProcedure(Fig.174)

arlinkage

2under"WormBearingAdjustment

ionofsteeringgear

ningsteeringwheelfrom righttoleft

approachendpositionscautiously,

berofturns.Thenrotatewheelback

n centerposition,roundheadpins

llbeattop.

mpull

thenturnlashadjusterclockwiseuntil

ortoothlash.Checkpull withspring

as showninFig.175,andmeasure


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caletoCheckAdjustments

ulledthroughcenterposition.Readjust

%poundsis notobtained.

elrimpull

kpullagainto besureadjustmenthas

AdjustmentProcedure

rmountingbolts

ingtoframenutsand placesealingcom-

.

mntobracebolt

achingbracetolowerwindshieldand

t,thenconnectsteeringcolumnto

ecurely.

ntingbolts

whichattachgear housingflangeto

bolt shouldbetightenedlastas this

erlypositionsteeringgear.

pull

elwithspring scaleasdescribedunder

ntProcedure"Para.255b.and"Sector

cedure"Para.255c.afterallmounting

edslimits,causemustbelocatedand

age

armas outlinedinPara.258.Pullall

ern compartmentandinstallrear

levispinand newcotterpin.


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TON,6x6

Bearings

ENT•

incorporateanautomaticadjustment

of opposedwedgeblocksandspringas

ofwedgeblocksis indicatedbyroundhead

mitofautomaticadjustmenthasbeen

ojects3«"measuredbetweensocketbodyand

is timemanualadjustmentbyscrewplug

ary.

justmentProcedure

t

screwplugtodraglink andturnplug

ingwearindicatorpin intight.

ubricatedbeforeadjustment.Backoff

dinsertcotterpin.Ball jointsmustbe

rDragLink


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geatStern

dplay andyetlooseenoughtoallow

OXANDLINKAGEADJUSTMENT

dercable,andlinkagemustbe correctly

eproper steeringonlandaswell asinwater.

mentisaccomplishedbytighteningor

dderstuffingbox.Adjustmentisrequired

fwaterentersthroughthestuffingboxor

rheated.Asmallseepageofwaterisnormal

dlubricatestuffingbox.Cableorlinkage

enevercablesagsorrudderdoes nothave

enttotherightor totheleftof straight-ahead

ustmentProcedure

enthatchcover

thatchcoverandentersterncompart-

fingbox.


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ON,6x6

ackingnut1/6turnand tightenlock

d,waitafewminutesandtighten

e.Whenlimitofadjustmentisreached

ffingboxhousing)backoffpacking

mentProcedure(Figs.173and178)

estopscrews

ndplacesupports behindfrontaxle

wheelstohangfreelyandadjuststeer-

outlinedin Para.74g.

ength

tingrodbetweenruddercontrollever

distancebetweencenterlinesofball

s not21%* loosenlocknutsbehind

dturnroduntil thisdimensionis

ficientlyperformthisoperation,one

ne inthesterncompartment.Turn

mrightandleftturn positionsand

udderstoplever contactsclipswelded

upport channel.Levershouldnot

verhits eitherclip,cableclampsmust

usteduntilthereis approximatelyequal

weenleverandeachclipwhenrudder

tturnposition.

LACEMENT

entisrequiredwheneversteeringgear

terwormandsectorgearbearingshave

eeringgearmayberemovedthroughtoe

gaftermountingbolts,linkageandplatein

ved.

Procedure

lumnatinstrumentpanel

alfromsteeringcolumnandremove

ssteeringcolumntobracketwhich

hieldpanel.

intoeboard

attachthreesectionsofclosureplateto

es.

kage

nkfrompitmanarmbyremoving


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llstud.Removepitmanarmnutand

lerKM-J 1376-G.

trolcable

throughhatchcoveropeningand

oldsendofleft-handcable.Remove

sconnectedcableendthroughloom

ltheendis inenginecompartment.

chcableclamptoruddercablespool

ool.

assembly

hichattachsteeringgear housing

eeringgearthroughclosureplateopen-

vefromvehicle.

nProcedure

ghclosureplateopeningintoe board

esiderail.Placecork gasketbetween

nsert 4mountingboltsthroughflange

annelplateinpositionagainstoutside

lockwashers,usingaliberalamount

erheadsofnuts.Do nottightenmounting

ounting

ngsteeringcolumnbracetolower

tpanelsaretightened,thenconnect

yinstallingbolt throughcolumnin

nutandtightennutsecurely.Tighten

attachsteeringgear housingflange

nt boltnutshouldbe tightenedlast,

o properlypositionsteeringgear

e

tedend ofsectorshaftwithflatsection

atchedanddraw pitmanarmuptight

d lockwasher,usingawrenchwith

tightennut.

mandsideof hullandattachcableto

edinPara.259.

nal

osteeringcolumnandinstall closure

gear

aras directedinPara.255,then

anarm.


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ON,6x6

GEREPLACEMENT

canbeaccomplishedwithoutdisturbing

Ruddershaftand linkageisaccessiblefrom

nt.

dure(Fig.178)

udder controllever

dershaftend ofconnectingrodand

tingscrewanddisconnectrodfromrud-

lampboltnutsin rudderstopand

versdownwarduntilkeyswhichposi-

posedandremovekeys.

box

offpackingnutoneor moreturnsto

ughstuffingbox.

aft

ntportionof sterndeckfrontplate

aft nut.Withdrawcotterpinand

andshaftandremovefromunder-

edure(Fig.178)

ng boxfromundersideofvehicle.

andstopleverover shaftandinsert

installshaftnut.Drawnutup tight,

leandbendflatovernut.

udder controllever

eywayandsliderudderstopleverover

.Insertkeyin keywayinmiddleof

roverkey andtightenclampbolt.

ox

asdirectedin Para.257b.

ure

tillerupperarm

ourclampsholdingendsofcablein

cableends outofthimbles.

eringcolumnspool

eftsideofhull intoenginecompart-

hichattachcableclamptospooland

dure

ation

einastraightline tobesurethere

ubleoneendbacktowithineight feet

kthecenteroftheloop.


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nspoolforinstallationof cable

ng,andsteeringwheelretainingnut.

eelusingpullerKM-J-452-G.Remove

ngcolumnjackettobracketwhich

hieldpanel.Removetwoclampbolts

gtosteeringgearand slidehousing

derspool.

bothfront wheelscleartheground

eright turnposition.Placecablein

nd installcableclampwithlongend

rportionof spool.Rollshortendof

ndmovewheelsto "straightahead"

eelswillwindlongendof cableon

he sametime,shortendofcable

werpartofspool andmustbeun-

gina ballfacilitatesunwinding).

htahead"positionwindtwoanda

earoundlowerpartofspoolin the

lampedonspool.

omatleftsideof vehicle(Fig.173)

rough flapatsideofhull andplace

de throughupperloomtostern

eshortendofcableoverlowerpulley

mto pulleyinsterncompartment.

steeringgear

versteeringgearand holdcables

hrough slotinhousing.Rotatehous-

n openingofhousingandinstall

m

edirectlytotiller arm.Passlong

ncompartmentcenterguidepulley,

entright-handguideassemblypulley

Para.257c.Donotkinkcable,

arPinReplacementProcedure

pin

iameterinlocatinghole inspool

eeringwheeluntilrodor nailfalls

ecesofpin outwith£,"diameter

ormshaft andrudderarein proper

inin shearpinhole.


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NPOWER

andinspection263

ent264

ION

dinthisvehicleis adualtwo-speed

ooutputshaftsat therearofpowertake-

winchpropellershaftand uppershaft

drive unitsareequippedwithshifter

epumpand winchtobeoperatedinde-

fisattachedtotransmissionwith6studs

armesheswithreverseidlergear in

sitpossibletooperatepowertake-off,re-

tioninmain transmissionisplacedin.

nespeedreverseforthe winchdriveshaft

eofthe threegearsonthepowertake-off

ertake-offdrivegear.Tirepump driveis

utchconnectingpowertake-offdriveshaft

G

esoccurringwithpowertake-offwould

oisyoperationshiftingdifficulties.Prob-

emediesareshownin thetrouble-shooting


vis- Checkqualityand

tityofoilin trans-

ngTightennuts264

yReplacepowertake-off

sketsInstallcorrectnumber

dofgaskets264


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POWER


aintransmissionand

thReplaceassembly264

on Cleanshiftrails263

ENANCEANDINSPECTION


omplishedaccordingtointervalsstated.

requireanyadjustmentsifit isprop-

on;however,itisimperativethat shifter

y paintorforeignmaterial,asshifter

oughoil sealsifshiftingis tobeaccom-

Iti srecommendedthatshaftsbecleaned

dat theregularpreventivemaintenance

EPLACEMENT

eplacedwithoutdisturbingtransmis-

driveshaftandtire pumpchainaredis-

ndedthatforwardleft-handfloorboards

removedandreplacementoperationsbe

yingonhissideon thebottomofthehull

alProcedure

smissionandallowlubricantto drain

ingoperations.

hain

n.

eshaft

oldsyokeofdriveshaft topower

riveyokeoffshaft.

ndwinchcontrolrods

pinsattachingwinchcontrolandtire

of shiftershaftsanddisconnectrods.

ff

rtake-offunitsothatit willnotbe

oppingduringremoval.Remove2

e-offsupporttotransmission,then

tachingpowertake-offtotransmis-


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ON,6x6

-off.Thenumberofgasketsused

ndtransmissionshouldbenoted,as

eusedduring installationoperations.

transmissionopeningto prevent

owertake-offisdisconnected.

tionProcedure.Beforeinstalling

ecttransmissiontoseethatnodirt or

edwhilepowertake-offwasremoved.

ansmission,makingsurethatsame

reremovedareinstalled.Drawup

dtightlyandinstalltwo powertake-

dpowertake-offsupporttotrans-

winchcontrolrods

chcontrolrodstoends ofshifter

dnewcotterpins.

aft

haftand slideyokeofdriveshaft

tshaft,makingsurethatkeyandkey-

s properlypositioned,tightenset

rsprocketsat tirepumpandwinch

lubricant

lugandfill transmissiontoproper

ctedinSectionVI.


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AXLE

andinspection268

nts269

placement271

ent272

ION

ntiallyatwo-speedauxiliaryunit,con-

outputshaftsfortransferof powertoeach

islocatedbetweentheframesiderails

nsfercaseandis drivenbytransmission

pring-loadedtypeoilsealsareused at

maindrive gear,drivenshaftandfront

din shiftershaftsintransfercaseare felt

ners.

gearsis accomplishedmanually

eeFig. 179)totransfercaseshiftershafts

forksfor actualgearengagement.

obtainableforbothfrontandrear

axlemustbeengagedbeforetransfer

wrange. Instructionsforcontroloftrans-

erationareoutlinedin SectionIII,"Con-

G

ccurringinmaintransfercasewill

oisyoperationandshifting difficulties.

ptoms,probablecausesandremediesfor

ur.


ollowrecommended

nspect,cleanand

pring269


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


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7/27/2019 TM 9-802 GMC DUKW-353


AXLE

ause

aph

9

I

ENANCEANDINSPECTION

ailyandperiodicintervalsandrou-

PreventiveMaintenanceandInspection,"

ntransfercaseandcontrols.

formationonproperlubricationof

n SectionVI,"Lubrication."

ADJUSTMENTS(Fig.179)

tmustbemaintainedtoprovideprop-

nsfercase.Adjustmentofdeclutchingcon-

nshiftershaft poppetballdoesnotseat

pport.Needforadjustmentofhighand

dicatedwhenshiftershaft poppetball

aftatshaftsupportor whenclearance

bracketondeclutchingcontrolleveris

ControlLeverAdjustmentProcedure

seatpositions

ver'sandcargocompartmenttogain

vecotteratclevispinwhichattaches

frontaxledeclutchingcontrolshaft

ftershaftin andoutoftransfer

etballisenteringdepressionsin shaft

edpositions.Leaveshaftin"out"or

ver

erasit shouldbeslightlyforward

osition.Whenfrontaxledeclutching

tion,clevispinatfrontof declutch-

upwithholein declutchingcontrol


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ON,6x6

hingcontrolrod

ntransfercaseremainsindisen-

ein adjustableyokeatendofde-

holeincontrolshaft lowerinner

ndadjustableyokeandturnyokeas

n yokeandcontrollever.Replace

d besureyokelocknutis again

verAdjustmentProcedure(Fig.179)

seatpositions

ver'sandcargocompartmenttogain

vecotterandclevispinattachinghigh

erendofcontrollever.Moveshifter

rcaseandlocatepoppetspringseats

tin neutralposition.Thisisbetween

ver

everindisengagedpositionandset

leverso that%"clearanceexists

edleverandbracketon declutching

rod

tableyokeofcontrolrodandlower

lineup,loosenadjustableyokelock

essarytolineupholes.Replaceclevis

ureyokelocknutis againtightened.

ENT

moveordisassembletransfercasein

rontendofmainshaft,forwardrearaxle

iveshaft.Thesesealsareaccessibleafter

ringretainershavebeenremoved.Oil

rive shaftrequirespartialdisassembly.

ccessibleaftershiftershaftsupportis

se.NotifyOrdnance.

SEMBLYREPLACEMENT

emovefloorboardsindriver'scom-

cargocompartmentfrontbulkheadand

partmentfloorinorderto removemain

nd180.)

driver'sand cargocompartment

ver'scompartment,airintakegrille

ompartmentfloor.Removecargo


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AXLE

T

HAFTJB?

HAFT~

stallation


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ON,6x6

eadasoutlinedinPara.214c.

tsatthefourtransfercaseflangesas

PropellerShaft,DrivingAxle."Re-

rshaftasdirectedin Para.237.

seandhandbrakecontrolrods

pinsattachinghighandlowspeed

dstoleversonrear crossshaft.Also

insateachend ofhandbrakecontrol

ovespeedometercablefromtransfer

y looseningknurlednutwithpliers

rivegearshaft.

removeboltsandnuts (sevenbolts

ngtransfercasecrossmemberto

member,transfercaseandhandbrake

mbly.

rfromtransfercase

haftmayberemovedfromtransfer

rsaredisconnectedfromhighand

rshafts(removecotterandclevis

ngbolts holdingtransfercaseto

ed.

Figs.179and180)

crossmember

ssmember,installingtheeight

sfercaseisplacedin vehicle.Be

ed underheadsofmountingbolts.

clutchingshiftershaftsto cross

s,usingnewcotter pins.

vehicle

ossmemberintovehicleandinstall

chattachcrossmembertoframe,

olrodto rearcrossshaftlever,using

Replacespeedometercabletotrans-

p.When replacingcable,besure

lemesheswithdrivengearshaft.

olrodtocrossshaftleverwithclevis

ehandbrakecontrolrodand attach

kel everwithclevispins.


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AXLE

tasdirectedin Para.237.Connect

gesof transfercaseasinstructed

Shafts,DrivingAxles."

oroperation

encompletelyinstalled,itshouldbe

ommendedlubricant.Adjustcontrols

REPLACEMENT

versunderdriver'scompartmentfloor

aft attransfercasecanbereplacedinde-

eplacementproceduresareitemizedin

shaftandbracketattransferreplacement

Para.272d. ande.

Procedure(Fig.179)

ver'scompartmenttogainaccess

owerlevers

swhichattacheachuppercontrol

rlever.

omshaft

nddeclutchingcontrolrodsfrom

akingout cotterandclevispins.

tchingcontrollowerleveranddrive

emoveWoodruffkeywhichholds

mpboltin declutchingcontrolshaft

er.Removekeyfromendofshaft

tsideofframe)out offrame

andhighandlowcontrolleversfrom

mbracket.

nProcedure(Fig.179)

erson shaft

oughouterbracketbushingwith

erofvehicle.Thenplacedeclutching

twithstop padtowardscenterof

yintokeywaynearcenterofshaft

proximatepositionasleverandshaft

ghandlowspeedlowercontrollever

Woodruffkeyintokeywaynearend

gcontrolshaftinnerleveroverend

ever clampboltwhenleverand

n.Whenshaftisproperlylocatedin

ftingleversarefree,tighten clamp

owerouterlever.


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ON,6x6

ers

ontrollevers,usingtwobolts,nuts

.

ercontrollevers,usingclevispins

partshavebeeninstalledorif

een changed,readjustasdirected

cketRemovalProcedure(Figs.179

ndlowshift lever

akegrille togainaccesstorear

ghandlowcontrolrodfromouter

ecotterpinandclevispin.Loosen

h levertowardsrightsideofvehicle

sed.Thenremovekey.

cket

tsattachingcrossshaftbracketto

acket,outerhighandlowshiftlever

haft.Shaftmaybewithdrawnfrom

terclampboltisloosened.

Procedure(Figs.179and180)

etandouter lever

ttocrossmember,usingthreebolts

hroughbracketouterbushing with

erofvehicle.Thenplaceouterhigh

ftwithstoppadtowardsendof bush-

keywaynearcenterofshaftand

matelocationasleverandshaftkey

owshiftanddeclutchinglevers

ntrolleveroverendofshaft.Then

waynearendofshaft.Placeinner

verendofshaft,beingcarefulto align

dtightenleverclampboltwhen

dinnerendofshaft areeven.When

tionedin bracketandbothleversare

outerhigh andlowshiftlever.

sshaftlevers,usingclevispins and

s havebeeninstalledoriflength

anged,readjustas directedinPara.


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andinspection276

ustment277

79

ION

dtorearfaceof clutchhousingby

shers.Inaddition,twolowermounting

gthofwirethreadedthroughtheheadsof

ssembly(engine,clutch,andtrans-

placebymeansofastabilizing rodas

vespeedsforwardandonereverse.

lythroughtransmissioninfourthspeed

ereas,infifthspeedand allotherspeeds

erisdirectedthroughgearsof various

gearratio.

shiftedmanuallybyconventionalgear

orrectgearratioforalloperatingcondi-

nsandinstructionsfortransmission

ectionIII, "ControlsandOperation,"

G

mefromthe transmissionmayactu-

rpart ofthechassis;therefore,beforeany

medontransmissionathoroughcheck

with driverifpossible,todetermineactual

emayactuallybein driveline—dueto

versaljointsloose,outofalignmentor out


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ON,6x6

ause

is-

or

.

ns-

aft

s.

9

VI

9

CEANDINSPECTION


MaintenanceandInspection,"shouldbe

theintervalsstated.

antinspectionandmaintenancepro-

eunit.Referenceshouldbemade toSec-

ypeoflubricant,intervals,andmethods

it.

movementofshiftlever ineachof

testis morereadilyaccomplishedwhen

willlevelanytendencyofgearsto slipout

encountered,needforcorrectiveservice

NTINGADJUSTMENT

d,connectedfromwaterpropeller

tonleftsideof transmissiontowaterpro-

upport,limitsforwardmovementofpower

justedwhenevertransmissionorstabilizer

Fig.181)

onas showninFig.181andinsert

keandbracketonwaterpropeller

rt.


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bilizerRod

nsmissionendofrod untilholein

ransmissionbracket.Installcotter

dtightenadjustableyokelocknut.

ENT

missionmainshaftis replaceableafter

aterpropellertransfercaseandtransmis-

e,andbearingretainerat rearofmain

Ordnance.

EMBLYREPLACEMENT

movedfromvehiclewithoutremoving

mmendedthatengineandtransmissionbe

erengineremovalequipmentisavailable.

verremovaloftransmissionfromengine

completepowerplantremovalinstruc-

g.182)

soffloorboardin driver'scompart-

ardsto supportsareremoved.

omofhull whichislocatedatrear

ission.Removetransmissiondrain

drain whileperformingremainder

omtirepumpfront supportboltand

mpsprocket.Placewireorrope

riser toholdtirepumpawayfrom

valprocedure.


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ON,6x6

stallation

Rod

Shaft

ossShaftand

olRods

ffsupport

ttachpowertake-offsupportto

ke-off(twoboltsatpowertake-off

on),andremovesupport.

kepedalandsupport

pinfromclutchpedalconnectinglink.


ofpedalrod.Removehairpinlockat

e clutchoperatingleveroffshaft.


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spinwhichattachesbrakepedalto

ltswhichattachpedalsupportto

swhichattachsupporttoclutch

portandbrakepedal.

vercrossshaft

ntrolrodatcrossshaftleverby re-

n.Removeremainingboltsandnuts

ketstotransmission(onebolton

onenutonr ightside)andremove

ketsasanassembly.Thisassembly

ltingright handbrackettoclear

deoftransmission.

ercontrollevercrossshaftand

ertransfercasecontrolrodsatcross

tterandclevispins.Disconnect

ertake-offbyremovingcotterand

tterpinfromwinchcontrolleverto

ovelever.Removecotterandclevis

stabilizerrodto waterpropellercon-

acket.Removeforwardnutwhich

ettotransmission,winchcontrollever

airpin lockfromright-handendof

ndbracket,leverandshaftas an

mainingnutwhichattachesright-

onandslidebracketoffstuds.

otransfercasepropellershaft

etweentransmissionandwaterpro-

ovingfourboltsand nutsfrom

ellershaft.

ff

swhichholdpowertake-offtotrans-

rtake-off.Usecaretoseethatgaskets

ndtransmissionarenotlostasthe

stalledtoprovideproper meshing

arsupportsand loosenboltinfront

engineapproximatelyfourinches.

rsupportsandengineinsucha man-

outwhentransmissionisremoved.

headscrewswhichattachclutch

hhousing.Cutwirewhichlockstwo


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ON,6x6

ingboltsandremovebolts(bolts

a %"endwrench).Supporttrans-

ovetwouppermountingboltswhich

tchhousing.Pulltransmission

clearofclutchhub.Donotlet

tonclutchdiscor discmaybe

slyaffectingclutchoperation.When

turntransmission90degreesand

opening.

ehicle

ringandsupportassemblyandre-

nyindicationofwear,asreleasebear-

eplacedunlesstransmissionis

ardenedbuttonsofreleaseforkare

gsupportbeforetransmissionis

oPara.111.)Placetransmissionin

carefulnottopermitassemblyto

utchdrivendisc hub.Transmission

efour mountingboltsareinstalled.

usingnewlockwashersunder

owertransmissionbolts (inclutch

ashersandpasslockwirethrough

ve beentightenedsecurely.

ousingpan

ngpantoclutchhousingwithfour

oveblocks(usedtosupportengine

val)frombetweenengineandengine

htenenginesupport bolts.

otransmission

ke-offtotransmission,checkthecon-

rectedin Para.264.Whenproper

xstud nutsandtightensecurely.

ansfercasepropeller shaft

etweentransmissionandwaterpro-

htenfourflangebolt nutsateach

ontrollevercross shaftandbracket

tbracketovertransmissionstuds

nbyinstallingrear nut.Reinstallleft-

ossshaftasan assembly.Securewith

inchcontrollevertotransmission

end ofcrossshaft.Attachwater

odstocrossshaft leverwithcotter


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hcontrolleveroverstudand hold

otterpin. Connectwinchcontrol

nstallingcotterandclevispin. At-

rodto waterpropellercontrolcross

adjustas directedinPara.277.

and crossshaft

cketassemblyontransmissionand

oleonleftside. Installboltsinupper

dnut overstud.(Remainingbolts

tbe installeduntilpowertake-off

kepedalsupportis installed.)Con-

dtocross shaftleverwithclevis

pedaland support

edalsupporttotransmissionand

gthetwobolts whichattachsupport

bolt totransmissionthroughsupport

peratingleveronshaft andsecure

shaft.Connectclutchandbrake

espectivepedalsusingcotterand

upport

porttotransmissionandpowertake-

hendofsupport.

ocketsatpowertake-offandtire

pfrontsupport tobracketonwater

ftleft-handbracket.RefertoPara.

djustment.

forservice

lubricantto transmissionasdirected

."Installfloorboardsindriver's


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GSANDTIRES

andinspection282

ent284

acement285

ent286

cement287

gtires289

maintenance290

reusedon eachaxleofvehicle.Front

tlytofronthubsby sixserratedboltsin

wheelis attachedtoawheelspacerbysix

tachedtoflangeonhubby sixseparate

sed ateachboltorstud. Tiresare11.00/18

withrubeand beadlock.Tiresare

asinglesplitlockring andthehingedtype

wheelassemblyismountedontopof

vehicle.

untedon opposedtaperedroller

eringknucklesandrear hubsaremounted

erbearingson tubularendsofrearaxle

driveflangeisattachedto hubbyeight

kedrumisattachedtoinner sideof

heelboltsandeachrear drumisattached

chattachwheelspacertohub.

er,air-cooledaircompressor,chain

f,islocatedjustbelowdriver'sseat.Air is

ankwhichisconnected,bycoppertubing,

fvehicle.Hoses,withfittingsforinflating

insidehull ateachsidejustaboveair

olledmanuallybya shiftlevernearright

tpumpinoperation,disengageclutch,pull

geclutch.Tostoppump,disengageclutch,

gageclutch.

G

uneventirewearorhardsteeringare


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7/27/2019 TM 9-802 GMC DUKW-353


GSANDTIRES

opertiremaintenanceorhubbearing

epumpdrivechainis usuallytheresult

ustment.

ause

ewear

d.

unted

n-

too

n- Checkalignmentand

e

ust284-286

e

flateall tiresto40

d- Adjustbearings.284-286

perly.Adjustbrakes94

tly.Inflateall tirescor-

eplacetires289

e.Adjustbearings....284

in- Replacewheelorin-

89

bal- Replacewheeland

oisy

chain290

pumpdrive chainorsprockets

hain290


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ENANCEANDINSPECTION

aintenanceandinspectionprocedure

hubbearingsandtire pumpshouldbe

withinstructionsgiveninSectionV,"Pre-

Inspection."Regularlubricationwith

tquantity,andatspecifiedperiodsas out-

ation,"isessentialtotrouble-freeopera-

ftirepump.

ctionProcedure.—Maintenanceandin-

ingwheels,fronthubbearings,rearhub

mpis coveredinsucceedingparagraphs.

CE

hatwheelboltnutsbe kepttightat

to1000milesoperationtightennuts daily

tnuts fortightnessatregularperiods.

attightnessof boltnutsbechecked

oninwater.

ningProcedure

washerateachlower corneroffront

eskirts.Use wrenchandwrench

letoolkitand tightenoppositenuts

wnup wrenchtight.Neverusean

le.

grooveinhull andattachtohull

andnutateachlower corner.

ingProcedure

olts(SeeFig.183)

andlesuppliedwithvehicletoolkit

CERNUTS(square-headed

sitenutsalternatelyuntilallare

xtensiononwrenchhandle.

ht, tightenthesixwheelnuts(hex

enchtight.

GADJUSTMENT(SeeFig.184)

mentofwheelbearingsatregularin-

wheelsfromgroundandcheckingside-

.Usealongbar undertireanddetermine

nersideofbrakedrum relativetobrake

sarein properadjustment,movementwill

ovementisexcessiveorifwheelsdo not

s.Becertainbrakesdonot drag.


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GSANDTIRES

ndWheelSpacer

oss-Section


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TON,6x6

—FrontHubBearings

eflange

and raisewheelsoffground.Bend

mheads ofcapscrewsattaching

movethecapscrews.ScrewTy

ppedholesinflangeandpull flange

leshaftbyturningscrewsalternate-

nge,lockringand gasket.Bend

yfromlocknutandremovelocknut

KM-J-1663.Thenremovenutlock.

g.185)

adjustingnutwrenchKM-J-1663.

nbackoffatleastone-eighthof a

tainitrotatesfreely.Checksidewise

etobrakedustshield (seea.inthis

gsareinproperadjustment,install

adjustingnutuntilshorttang on

tin adjustingnut.Bendshorttangs

utslots.

nwithwrenchKM-J-1663.Check

hisparagraph).If adjustmentis

nut lockoverintoslotson locknut.

flange

langeand replaceflangeonsplined

screw lockringandinstall cap

angetohub.Install fenderskirts

uts andnewlockwashers.Lower

04

odofAdjustingHubBearings


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7/27/2019 TM 9-802 GMC DUKW-353


GSANDTIRES

ARINGREPLACEMENT

greplacementrequiresremoving

langebearingadjustingnutand lockand

mblyoffsteering knucklespindle.

sconnecthub

semblyasinstructedinPara.289.

flange,bearinglocknut,nutlock

tructionsinPara.284.

washerandouterbearingcone.Then

emblyoffsteeringknucklespindle.

earingconeandinneroil sealwill

lacement

r inneroilsealare tobereplaced,or

ricated,removeoilsealwith screw

ressfitin hubandshouldnotbe

ybecauseitcannotberemovedwith-

of innerrace.Inspectbothbearing

excessively,remove,usingadrift

ringsasfollows:

duse

ll par-

flat

ock

.

d

rect-

care-

y

ndrace

wear.

edry.

cator


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ng cupsinhubwithwideside of

cewithdriverKM-J-1660-3.Hub

tedatregularintervalsas explained

."Neverpackhubswithlubricant

ngsor hubsthroughpipeplugs.

ndcleanasinstructedabove.Then

ll ubricator(seeFig.186).

oilseal

n innercupandinstallnewoil seal

rtainsealisinstalledwith flexibleseal-

youtwards(awayfrombearing).

specialseal driverKM-J-2347.

one

blyintoplaceon knucklespindleand

herandadjustbearingsas instructed

ock,locknutand driveflangeasin-

acewheelandtireassembliesand

ra.283.Lowerandremovejack.

ADJUSTMENT(SeeFig.187)

ionsinPara.284a.todetermineneed

—RearHubBearings

hichbearingsareto beadjustedand

und.Bendtangsof lockplateaway

chingaxleshaftdriveflangeto hub

crewsandlockplate.Insert two

n flangeandpullshaftout ofdif-

drawingupalternatelyonthetwo

ened,withdrawfromaxlehousing.

2),(3)and(4) underPara.284b.

susedat rearwheelsinsteadof

sideof shaftdriveflangeandinstall

nerend intosplineddifferentialside

lateand attachflangetohubwith

elyuntilallare tightenedtoatorque

Lowerandremovejackfromunder


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GSANDTIRES

utandSeal

ssSection

RINGREPLACEMENT

greplacementrequiresremoving

ocknut,nutlock,adjustingnutand bear-

enwithdrawinghubanddrum assembly

arytoremovethewheelspacerfromdrum.

connecthub

semblyfromwheelspaceronhubas

enremoveaxleshaft,bearinglock

using wrenchKM-J-870.

washerandouterbearingcone.Then

ofaxlehousing.Bothbearingcups,

ilseal,wheelspacer,brakedrum and

rumwillcomeoff withhub.Oilde-

remainin placeonhousing.

lacement

arings

erbearingconeand bothbearing

rdancewithinstructionsinPara.

ulwhenremovingouterbearingcup

earingcupandnotagainstsnap ring

snapring.

.285c.operation(2).


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ON,6x6

ng cupsinhubwithwideside of

acesolidlywithdriverKM-J-872-1

4at innercup.

edinPara.285c.operation(3).

eand oilseal

n bearingcup.Installnewoilseal

iverKM-J-2346.Besureleatherside

ardsbearing(i.e.,syntheticrubber

one

blyintoplaceon endofaxlehousing

onein outerbearingcup.

.285c.operation(2).

emblyasinstructedinPara.289.

omicaloperationofthisvehiclere-

ntenance.Sincevehicleisdesignedto

ater,it maybenecessarytooperatewith

onditiontoobtain sufficienttractionto

ach.Undersucha condition,tiresmaybe

sarytoobtainrequiredtraction.Airpres-

ypoundspersquareinchfor operationon

umpwithair hosesisprovidedinvehicle

latedassoonasroadsurfaceconditions

tionandmaintenanceasdescribedin

entialtosafe andeconomicaltireservice.

re

moveallforeignmattersuchas

eplaceanymissingvalvecaps.Re-

onttiresarewearingunevenly,

instructedinPara.74.

redailywithanaccurategauge.

urelossanddeterminecauseofsuch

.-Alwaysusesame pressuregauge

fromdifferencesbetweengauges.

einflatedtosamepressure.


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7/27/2019 TM 9-802 GMC DUKW-353


GSANDTIRES


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

2)2^^^BRAPD16213

odofInstallingBeadLock

NTINGTIRES

rerequiresremovingwheelfrom

gfromwheelrim, slidingtireandbead

beadlockring andtubefromcasing.

allingtubeandbead lockringincasing,

mandi nstallinglockringonrim.

ure

ingandraisetire offground.

assembly

nderskirtbyremovingbolt,nut and

erofskirt,then removethesixhex

scto hubandremovethewheel.At

xhexhead nutstoremovewheelbut

headednutsholdingwheelspacerto

e(SeeFigs.188and189)

mpletelydeflatetire.Uselockring

hvehicletoolkit.Insert straightend

nearsplit.Pry lockringoutofrim

movingbarbetweenrimandlockring;

tofrimcompletely.

gassemblyoffwheelrim.

tube

flatetubeenoughtospread tire

vingbarto pryuponbeadlockat a

inge.This willcollapsebeadlockto

ermit.Turn completebeadlockring

eFig.189-A)to providenecessary


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7/27/2019 TM 9-802 GMC DUKW-353


GSANDTIRES

sbeadlockis removedfromcasing.

romcasing.

re

singandinflateenoughto holdtube

edathinge,insert valvestem

ng andinstallringinside tirewith

stoplaneof tire(seeFig.189-Afor

essbeadlockringintotire untilpart

vestemopeningis centeredbetween

ufficientlyto spreadbeadsoftire

untaswidth oftirebeadlock.Turn

e fromitspositionat90 degreesto

apositioninsameplane astire

ntopositionbetweenbeadsoftire.

onwhichwillbringlug(not shown

lvestem,directlyunderhorizontal

beadlockis inposition.Deflatetube

ckin placewithonefootandjerk

othhands (Fig.189-C)untilhinge

eadlockandbe certainthatitis

tsedgesare belowedgesoftire

n bothsides.

gassemblyoverwheelrimwithvalve

esurethatthelug onbeadlockring

wheelrim.

roughholeintirering sothathook

of wheelrim.Then,placeendoftire

erimwithsplit nearscrewendof

wagainstlockring andforcelock

tighteningupon screw.Usering

crew.Placeclamp(onchainat-

mandring toholdringin position.

etoolandmoveitto thenextholein

positionat thispoint.Moveclamp

eartheend ofscrew.Removethe

eries ofoperationsuntiltheentire

m.

pressure.


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ON,6x6

nkandLinesInstallation

ssembly

mblyonwheelboltson hub.Installthe

dtightenoppositenutsalternately

a.283.)Atfrontwheels,replace

movejack.

DTANKMAINTENANCE

oftirepump,airtankor linesisbe-

g ArmsPersonnel.Ifpumpbecomesinop-

However,inspectionandmaintenance

andc.in thisparagraphshouldbeper-

.190forinstallation.)

tomof tank.Withairintankunder

wideandblowoutall moisturefrom

ecock.Itisimportantto blowtank

ngcoldweather.


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GS,ANDTIRES

,

—fU

unting

tment

kets

pisinoperation,or ifinspection

chainorsprockets,chainshouldbe

nmaybenoisy.A tightchainwill

91)

disengagedposition,rotatepump

whetherchainbecomestightatany

erevolutionofpumpsprocket.To

ton adjustingboltandscrewthenut

portbracketupwardstotighten

osenchain.Whenchainisin proper

etight duringanypartofa revolu-

elooseenoughto besloppyatany

stedproperly,tightentopnut on


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andinspection294

96

7

98

ent299

ION

orizontaldrumtype,mountedin

ent.Itisequippedwitha manuallyoper-

ngageor disengagedrumwithdrum

rakewhichbears againstflangeofdrum

sengagedandis designedtokeepdrum

hencableisbeingwithdrawnfromdrum

kwhichis designedtolockdrumfrom

sengaged,therebypreventingcablefrom

fvehicle;andan automaticwraptype

nedtohold loadatanypositionwinchhas

son,powerhasbeen cutoff.

rovidedthroughpower take-off

oftransmissionwhichisconnectedto

shafts.Ashearpin isprovidedindrive

Shearpinis designedtoshearwhenwinch

y,therebypreventingseverestrainson

rdriveshaft incorporatesastopcollar,

hichpreventsshaftfromslidingforward

fand whenshearpinisbroken.CAU-

infurnished—neverusea substitute.

expensivereplacementofparts.Spare

terncompartment.RefertoPara.24for

G

ctionsonuseof winchgiveninPara.

moothlyandwithoutexcessivenoise,

:


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7/27/2019 TM 9-802 GMC DUKW-353



henshifted intogear

ged

sen-

stall newpin297

d

ad-

worn

mshafthousing

ted

being

ablewhencableis beingpulledout

m

95

wormFillhousingto level

ofhous-

drum

ENANCEANDINSPECTION

ectionV,"InspectionandPreventive

alsshouldbeaccomplishedonwinchand

detoSectionVI,"Lubrication,"for

onintervals,andmethodoffillingand

eptin thebestconditionandshouldbe

valsforrustand frayedcondition.Winch

cationofgrease(seeSectionVI,"Lubrica-

sting.Inaddition,thecableshouldbe

asdescribedin Para.24.

quires,asindicatedbytest,dragbrake

ldbeadjusted.SeeinstructionsinPara.


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6


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7/27/2019 TM 9-802 GMC DUKW-353


rake

TS

sgivenherehavetodowith operating

ustmentsrequiredwhenoverhaulingor

tmentsarerequiredandaremadeas

.Adjustmentofdragbrakeisre-

overrunscable whenitisbeingpulled

utch

arto rightasitwill go,thuscom-

fromsideof drumflange.

ombrake

wedgebetweendragbrakeandhead

tawayfrombrake.Thiswillmove

esonlocknut andadjustingnutat

enchandbackofflock nut.Turn

urn,thenremovewedgefordeter-

asbeenobtained;if not,repeatthe

mentbyturninglocknutuptight

tment.Needforadjustmentofauto-

he eventbrakefailstoholdload atany


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TON,6x6

twhenpoweris cutofffromwinch.One

etherornotthisbrake requiresadjust-

nt

icleatthetopofa steepgrade.Fasten

hicleatbottomofgrade.Pull vehicle

.Afterareasonablehaul,depress

hwillstoppullingandvehiclebeing

ward.Inthe eventbrakedoesnot

sindicated.CAUTION:Brakemay

roperlyadjusted;however,ifhand

veron accountofheat,thisindi-

andshouldbeloosened.Brakeis

f properlyadjusted,willnotbecome

testhatbrakeshouldberelinedor

,thentightenadjustingnut1/2 turn.

tadjustingnut.

fbrake

asdescribedabove.

MENT

eremovedfromvehiclebyremoving

s andhullandbyremovingshearpin at

.Nootherunits needberemoved.

hainfallor othersuitablemeansso

dswungclearofvehicle.Removeleft-

upport boltnutandlockwasherand

bolts

rsupportangletobracketboltnuts

ovebolts.(Itisnot necessaryto

uardtosupportanglebolts.)

rbolt

toright-handrearsupportangle

ndremovebolt.

ntbolt

hatchcoverforaccesstowinchend

ormshafthousingstudsand shear

metohullbolt nutandlockwasher


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7/27/2019 TM 9-802 GMC DUKW-353


studs

wormshafthousingstudswith lock-

wormshafttodriveshaftshearpin

pin. Swingleftendofunit clearof

cle.

eguard

ardandsupportangletobrakecover

ndtwosupportangletowormshaft

shers.Thisoperationisnecessary

ssembledto unitbeinginstalledin

ard

uardandsupportangleassembly

mreplacedunitto replacementunit

ngleto brakecoverstudswithlock-

angletowormshafthousing studs

hainfallorothersuitablemeans,

o positioninvehicleguidingwinch

yoke.

e

ortangletobracketbyinstalling

dnuts.Attachleft-handropeguard

ngbolt, lockwasherandnut.

andrearbolts

portangleto winchendframebolt,

lwinchendframetohull bolt,lock-

ds

ormshafthousingstudswithlock-

haft shearpinandcotterandclose

menthatchcover.

MENT

mshaft shearpinisaccessiblefor

ncompartment.Asupplyofspareshear

din aspecialmountingbracketlocatedin

winchwormshaft.

nthatchcoverhold-downboltwing

.Raisewinchdriveshaftslip joint


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ON,6x6

stallation

mgroovein shaftsplinesandmove

bularshaft.

ersaljointforwardon splinesuntil

nholein winchwormshaft.Using

tionsofshear pinfromwormshaft

ke.

ft

greaseonforwardendof winch

versaljointyokeseizingto worm

atshearpin holeinuniversaljoint

holeinwinchwormshaft.

ardsothatshearpin maybein-

ointandwormshaft.Install shear

pin.Movestop washer(snapring)

haftsplines.(Fig.195).Closestern

randsecurewithhold-downbolts.

y.

CEMENT

catedjust insideofframeleft-hand

mationonaccessibilityoftheseshafts and

toPara.66. Itisrecommendedthat

essivelystartingatwinchandworking

mumaccessibilityformechanic,itis also

compartmenthatchcoverisopened;cargo

eftfrontfloorboards,anddriver'scom-

andfloorboardsareremoved.


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7/27/2019 TM 9-802 GMC DUKW-353


enterBearing

gs.192and196)

ntstopwasherfromits groovein

ong splines,towardsfrontofve-

emoveshearpincotteranddrive

ngasuitablepunch.

fromwinch

rwardon shaftsplinesuntil"U"

winchwormshaft.

atedriveshaftrearyoke

U"jointyoketorear endofrear

moveyokefromshaft.Yokeiskeyed

t

ehicle,throughcargocompartment

atedriveshaft

U"jointyoketofront endofrear

emovetworearcenterbearingto

earintermediateshaftwithrear

e.Center,centerbearingand"U"

hicle.Yokeis keyedtoshaft.Do

rbearing

frameboltnuts,lockwashersand

thenremovebearingandupper

willprovideroomforremovalof

diatedriveshaft

U"jointyoketofront endoffront

moveyokefromshaft.Yokeiskeyed

.Removeshaftfromvehicle.


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

earing

ngtoframeboltnutsand lockwashers

ers.Thenremovecenterbearing

ft

ing shaftofffront"U"joint

mvehiclethroughcargocompart-

t

U"jointyoketopowertake-off

fromshaft.Yokeis keyedtoshaft.

earingfromshaft

rmediateshaftisreplacedbynew

epressedor drivenfromshaft.

stallfront"U"joint yoketopower

kesetscrewsecurely.

splinesoffront"U" jointinsucha

soneither endofshaftwillbe in

ng

npositionbut donotattachto

tedriveshaft

haftinposition,insertingfrontend

ber,andinstallfrontcenterbearing

keywayofshaft andinstall"U"

amannerthat"U"joint yokeson

nsameplane.Tightenyokeset

ringtoframe

lts,insertboltsthroughbearing

onspacerssobearingwillbeat proper

nstallboltlockwashersandnuts.

edriveshaft

ngandrearcenterbearingon rear

ndplacedriveshaftin positionin

ayatfrontendofshaft andinstall

tenset screwsecurely.


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7/27/2019 TM 9-802 GMC DUKW-353


centerbearingsto frame

earingtoframeboltsin bearing

ceroverbolts,sobearingwill beat

ththroughframe.Install twospac-

toboltsand tightennutssecurely.

ingto frameboltsthroughbearing

stalllockwashersandnuts.Tighten

sition throughcargocompartment

keyinkeywayinrear endofrear

tall"U"jointyoketo shaft."U"

shaftmustbeinsameplane.

to winch

ntand install"U"jointrearyoke

llstopwasher(snapring) ingroove

Para.297.

closesterncompartmenthatchcover

REPLACEMENT

inkageis accessibleforremoval

mentleft-handfloorboardopening.Lever

mvehicleby removingcottersandpins.

artmentleft-handfloorboard.

olinkclevispin cotterandwasherand

otransmissionstudcotterpin and

emoveleverfromstud.

ake-offshiftshaftclevispin cotter

evispin.

cle.

verpowertake-offshiftshaftandin-

shiftshaft,placeplainwasheroverclevis

overtransmissionstud.

verstudand installcotterpin.

rollever inlinkandinstall clevispin,

river'scompartment.


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sts300

301

CLATURELISTS

dLubricatingMaterialsSNLK-1

1919A4,fixedandflexible

,Thompson,M1928A1....SNLA-32

owning,M2,heavybarrel

ndmountsSNLA-39

CATIONS

ndLubricatingMaterialsTM9-850

ction

M9-1802

nanceTM10-525

ecautions,accidentsTM10-360

nTM10-545

enderandradiatorrepairs.TM10-450

1919A4FM23-50

,ThompsonM1928A1FM23-40

al..50,alltypesTM9-1225

dmotorizedarmyequip-

equipment—Association

rageofMilitaryMotor

10-580

M10-540

attackFM21-40

M1-455

0-550


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7/27/2019 TM 9-802 GMC DUKW-353


of

Vehicle

o-

te..7

lates11

lates12

on

Dip

19

tion.25

Posi-

cles..41

rn...41

gside.42

h

ck45

Even-

100

0to 150

0to 300

o 70

0to

0to

om

om

ndTree49

ee...49

atch

atch


/ h t t p : / / w w w . h



7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

gto

gto

149

ge...155

edPosi-

prings.158

158

ut...159

160

bly...161

62

65

8

171

ntrol

Dia-

m177

gCon-

nction

ngHar-

rterHar-

Switch

ness...182

orand

ing

...185

tage188

-

n..-207

...214

n..214


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7/27/2019 TM 9-802 GMC DUKW-353


pPack-

n287

and

dCon-

Pump

entPanel298

nd

embled

y313

iveIn-

ngBox.321

eller...327

on330

nd

332

n332

ng

nkage.341

Lash.. 342

heck

ngs.... 344

k344

rn345

s354

tion...357

.

..

cer371

71

2

5


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7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

3

82

fercase355

9

98

34

362

1-103

eopera-

e)

ntre-

ear114

186

15

t217

t218

ement.219

302

m124

alve....142

33

127


/ h t t p : / / w w w . h



7/27/2019 TM 9-802 GMC DUKW-353


.......168

166

cement170

........172

173

5

nt239

ateddata)

lacement

ent220

66

winch....388

ts(See

xle)

ession

22

nt..223

5

nt239

stment254

3

2

236

nical....231

on227

8

80

259

m)

165

04

ntre- P u b l i c D o m a i n , G o o g l e - d i g i t i z e d

/ h t t p : / / w w w . h



7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

ent..

4

86

280

ent....285

t286

7

9

ment....290

ent133

8

e3

s195

97

01

95

00

butor..201

98

99

ch....21

cement..300

ighting)

9

02

tchre-


/ h t t p : / / w w w . h



7/27/2019 TM 9-802 GMC DUKW-353


,clutch...160

86

gulator.208,210

244

(Alsosee

5

80

er320

wer....351

r318

ent322

6

20

t327

nt321

ater326

xle304

09

t316

312

306

em)

ession222

22

nt223

4


/ h t t p : / / w w w . h



7/27/2019 TM 9-802 GMC DUKW-353


ON,6x6

t286

g)

wer350

351

7

em164

g378

370,376

1

36

e353

56

nt355

355

eller321

63

362

362

103

8 i t r u s t . o r g / a c c e s s_ u s e # p d - g o o g l e

Documents

TM 9-802 GMC DUKW-353