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

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T~~JVN Q'

lUrCorporation)

tions

edium

ombina-

vehicle

ditions

uctions

667-71

4

d

Engine)50-6176-137

esTM9-754,August29,1942.

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ructions (Cont.)

onsystem62-69138-153

-230

aljoints96-103256-266

7

118298-318

9-324

gsystem126-137325-354

80

381-*52

t187-190453-460

63

4-466

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tions

heinformationoftheusingarms

theMediumTankM4A4this

mationrequiredfortheidentification,

chrepairsasmaybehandledby

rtakenonlyunderthe supervision

nic.

ftherepair,modificationoradjust-

litiesoftheunit,theresponsibleord-

dsothattrainedpersonnelwith suitable

ided,orproperinstructionsissued.

754,MediumTankM4A4,

ariousunitshavebeenreplaced

nalillustrationshavebeenadded.

rtainingtovariousunitshas been

eenaddedandlubricationin-

armored,fulltracklayingvehicle

all-weldedconstruction,andacast

withtheturretsusedon allM4series

he"ChryslerTankEngine"power

l.Thevehicleserialnumberi s

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mTankM4A4

ndtwo rear)towhichthetowing

erencestoserial numbersthroughout

.

ODELS.

PS,mountedonthedistributorendof

dinproductionfromvehicleserial

03 (fig.19).

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mTankM4A4

untedonthedistributorendof the

oductionatvehicleserialnumber5804

untedonthe distributorendof

nfromvehicleserialnumber4805to

inningwithvehicleserial number

onthedistributorendof No.4engine

ntedbetweenenginesNos.1and

hicleserial number4805toserial

gwithvehicleserialnumber5804,

ightingcompartment(fig.153).

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heChokeType,wereusedin

mber4805tovehicleserialnumber

ber16555to serialnumber17112

serialnumber17113thermostatsof

).

closedtype,wasusedinproduc-

805to serialnumber6204andfrom

mber17793 (fig.65).Theventilated

atvehicleserialnumber17794.

eoffueltank wasusedinM4A4

mber4805toserialnumber6204 and

l number17793.Theinsulatedtype

vehicleserialnumber17793 (par.77).

05

mately66,000Ibs.

.

3in.

400rpm(prop,shaft speed)

ories5,375Ibs.

stresistor

ater

unit)160gallons

ngunittank)5l/2gallons

ng8hours at20mph

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s

illingafter

2F.

o-30F.

unds persquareinchat750 rpm

60poundspersquareinch

F.aboveoutsideair temperature

road)20mph

)'.25mph

speed2,900rpmshortperiods

d750rpm

longerthanfiveminutes.If neces-

dslongerthanfiveminutes,adjusthand

to950-1,000rpm.

ty35degrees

lity35 45degrees

ewillnegotiate24in.

eestraverse).

topof turret.

guninclipin turret.

nd.

n.

ionisprovidedforthedriver and

rectvision devices.

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thick,360degreestraverse.

ch

s

supplytank)10gallons

gallons

gallons

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S

nce6

NCONTROLS.

olisentirely automaticand

torof thevehicle.

.Afootacceleratorpedalislocated

using,convenienttothedriver'sright

pedal,a hand-operatedthrottleis

bracketjustforwardof thegearshift

dthroughapush-pullcontrol.

bracketmountedtotheleft wall

venienttothedriver'slefthand(fig. 9).

eversaremountedonthe floorof

ver's seat(fig.9).Tosteer thevehicle,

etowardwhichitis desiredtoturn.

versslowsdownthetrackonthat side,

kiscorrespondinglyincreasedtoassist

ereispoweron bothtracksatall

thrubbergrips.

rolhandlesofthefuelshut-off

thepowerunitcompartmentbulk-

shafthousing(fig.34).

arning.Fiveredwarningsignals

mentpanel(fig.10).Aboveeachred

ndicatestheenginereferredtobythe

dlightindicatesanengineoperating

nnormaltemperatureisreached,the

ff.Ifoneor moreoftheselightsappear

anormallyfunctioningpowerunit,the

be operatingpoorly,ornotatall.

ocatethetrouble.

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ghwatertemperatureinany

heredsignalonthe instrumentpanel

")tolightandtherebywarnthedriver

uregageselectorswitch(fig.10)

gonthewatertemperaturegageto

signalcame.Stopthepowerunit

engineindicated.

onis "ON"whenignitionswitch

ht.

h buttontypeswitchlocatedto

nergizesthestartingsolenoidwhen

gbacksimultaneouslyonbothsteering

ehicle,dependingontheeffortapplied.

kingbrakeleverislocatedonthe

isatransmissiontypeofbrake.

sethanparking.

slocatedto theleftofthe

driver'sleftfoot(fig. 9).Topermit

sengagedbydepressingtheclutch

d,the powerunitwillrunidle.

RATION.Shiftingofgearsin thetrans-

mplishedbythegearshift lever,lo-

rightofthedriver(fig. 9).

ftleverforthe variousspeedsare

edwithalatch whichprevents

dorreverse.Thelatch mustbereleased

topoftheleverbeforeshifting into

reextinguishercontrols(fig.

rearof thedriver,arewithineasy

ontrolslocatedjusttothe rearof

eextinguishersfromoutsideof vehicle

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LS

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EMAINTENANCE.

ankdriverandeverymemberof

evehicleunderthedirectionofthe

uldcoverthecompletevehicleaswellas

owerunitare filledwiththe

inthelubricationguide(par.23).

essary.

urn ignitionswitch"ON"and

fuellineconnections.

leakageinthefightingandpower

he groundunderthevehicle.

fuelsystemandinoil lines.

torand filltobottomof filler

ofradiatorfordirt.

dconnectionsforleaks.

tordrivebeltsfor adjustment

par.107.,c.).

eunits(par.107.,e.).

sprockets,bogies,springs,guides,

rsandidlers.

ssandtension,andcheckend

arintrackwedgesandwedgenuts.

ksandgeneralcondition.

itionoffireextinguishersand

s,clutchpedal,acceleratorpedal,

over theirfulltravel.

seethatammeterreadszero

otherinstrumentsindicatenormal

1)andwatchammeterandvolt-

vedischarge,open.batteryswitch

hetrouble.Correctreadingonthe

iren operation.

generatingunit fueltank.

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n switchisturned"ON",checksig-

and sendingunitsonpowerunit

epowerunitwill operateat

ertemperaturegageregistersaminimum

seethatthegeneratoris charg-

cate"-)-"withpowerunitidling,speed

pressingtheaccelerator.Iftheam-

lookforslippinggeneratordrive

g.10)shouldregister between

tiswarmedup.If temperature

tand investigateforlossofcoolant.

lercapfromahotradiator,always

letallsteampressureescapebefore

eisapossibilityof seriouspersonal

cknutholdingcap inplaceandallow

s freetoopen.

itions

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segear,acompletestopmustbe

tachometer(fig.10) reads750

OTE:Donotidle powerunitatthis

necessarytoidle powerunitfor

adjusthandthrottle toincrease

.Depresstheclutchpedalandmove

sition(fig.12).Neverattempttoback

stationedinfronttoguidethe driver.

andsteeringlever(fig.9) to

leverto makealeftturn.This

mturning asfastasthe othertrack

driveranticipatesmakingaturn

celeratortoagreaterextent,de-

turn.

heacceleratorandpullbackon

time,depressingtheclutchpedalwhen

proximatelytwotofivemiles per

risbeingemployedbeforestopping.

on thetransmissiontothe

Usethis brakeonlyforparking

motion.

eraturegage,theoil pressure

age(fig.10) givethemostsatis-

nit'sperformance.Shouldthetach-

ethecauseandcorrect.Theoil tem-

proximately120F.aboveoutsideair

tion.Shouldthisgagefailtoregister,

eratingtemperature,investigatethe

ldreadbetween25 and60pounds

houldreadbetween40and 70

rpm.Thewatertemperaturegage

d235 F.Ifthegageindicateseither

ure,orifthe"high watertemperature"

stopthevehicleandinvestigatethe

or,whilewatertemperaturegage

2F.,checkforfaultypressurevent

afterithas reachednormalop-

ndthrottleclosed,investigatethe

unitidlespeedis750 rpm.CAUTION:

hanfiveminutes.If necessarytoidle

n fiveminutes,adjusthandthrottle

1,000rpm.

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ankM4A4,includesthefollowing

rret whichcarriesa75-millimeter

fig.15); anantiaircraftmountonthe

machinegun;aballmountin theassistant

nner)(fig.15),mountingacaliber.30

machinegunis carriedintheturret

nersitsatthe rightofthe75-milli-

tionof25 degreesanddepressionof10

hehandwheelofthe elevatingmech-

eguns isobtainedbytraversingtheturret

nsarefiredelectricallybymeansof

sleftfoot.Thesegunscan alsobefired

ationofthegunsis maintainedbythe

sdescribedinparagraphs138to 159

ntdriver'scompartment(orbow

bothelevationandtraversewithinthe

s manuallytraversedbyrotating

gthegunon itsmount.

ncanbeused eitherthroughapistol

oughtheturrethatch.

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KINGPIN

StationinRightBow

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dof

rdof

tof

bas-

dtur-

xes

r.

xes

di-

ound

ard

t.

und

et

enda-

.

2

eft

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E

peration20

foperation21

y,itisnecessarythatvehiclesbe

valsinorderthatdefectsmaybedis-

yresultinseriousdamage.

orother metalpartsmayfre-

mediumofdustand oildepositsat

ofarun.

hangesindesignpromptedby

aunitor groupofunits;pertinent

ancemethods;andchangesinvolving

mfort,totheofficeoftheChief of

nnels,atthetime theydevelop.Such

ther organizationsmayprofitthereby.

refullydone,-andis covered

etectabnormalfunctioningof

ote ifanyunusualnoisesappearin

frequentlyat theinstrumentpanel

unctioningproperly.Lowoilpressure

gnal ontheinstrumentpanel,there-

deif thiswarninglightappearswhile

onstantspeed.Oilpressurewillread

vingspeedswhenoillevelis high

willbeindicatedbythewarning

ereforeaninvestigationmustbe

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arsduringarun.Thisis indicative

orlowcoolantlevelinthe radiator.

achenginebyturningthelever on

torswitchtotherespectiveengine,

3,4,5,directlyabovetheswitch,

rtemperaturegage.

ntofclearanceoftheclutchpedal.

aph95.NOTE:Thisclearancemust

ntat alltimes.Checkthesteering

eengagement,intensityofpullre-

mmeterforproperchargingrate(10

ellcharged;amaximumof50amperes

arged).

mstancesshouldavehiclebeoper-

avebeenobserved.Whenin doubt,

ssistance.Inspectionduringoperation

hasizethisfactthroughoutthe driving

Thismaybecausedbyaccumu-

h,orbybroken ordamagedbladesin

pectionofthevehicletodeter-

dition.Correctanyminordefectsde-

withminordefectsdiscoveredatthe

fthedefectscannotbe corrected

ositionof thevehiclesothatunneces-

jorfailure prevented.

inspectionduringthehaltisas

ornotmorethan fiveminutes

nforunusualnoises.NOTE:Do

nfiveminutes.Ifnecessarytoidle

n fiveminutes,adjusthandthrottle

00rpm.

ingcarefullyforfuel,wateror

ntajidforworn,loose,broken,

anyforeignmateriallodgedinthe

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E

missing,worn,orlooseparts.

ndgear caseforevidenceof

operation,ifassignmentpermits

hetanks.

tor.If levelofcoolantislow,

serveprecautiongiveninparagraph

notuseanoilyor dirtyrag.

belts(onpowerunitsso

ings.

eration,haveaninspectionmade,

morethoroughanddetailed.Follow

ntenance.Ifdefectscannotbecor-

efofSectionor otherdesignated

points:

rwornor brokenteeth.

r unserviceableunits.

ar.23.).

units.

ar.75.,f.).During extremely

halt.

hieldwipers.Checkforloss or

devicesforbreakage.

fectiveperformance.

ent,andaccessoriestodetermine

lled.

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ingcompartmentsforcleanliness

tion.

servingprecautioninparagraph

ngpointofsolution (par.83.,i.).

nhotweather,checkbatterywater

ordrivebelttension(on mul-

oseconnectionsandabrasions.

valvesareclosed(fig.19).

is open(fig.121).

MILESOFOPERATION.

ovingthepowerunit fromthe

startingpreventivemaintenance)

thefollowing:

dividualengine,byshortingout

nofother engine.

pplytankforleaks.

s forbreaks,looseconnections,

igidandflexiblelineshavingsharp

ar.80.,c.).Ifexcessivewateris

noutletscreens(par. 77.,e.).

newoil butdonotoverfill(par.

pesand flexibleconnectionsforleaks

boltsand checkforloosebolts

Noteconditionofvolutesprings,

cks,suspensiongudgeonpinsandbogie

oseormissingwedgesand wedge

ordeadtrackblocks.

orexcessivewear.

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E

nutsfortightness(fig. 90]

ovalofthatpartof thepropelle

stherearpropellershaft,as wel

ropellershaftfrontflange.

centerbearingsupportbracke

fig.91).

owarmat750rpm. NOTE:D.,(5)).

e(fig.26).

washersandliftcoverfromradiator

sin tank.

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andforeignmatterfrom mounting

ank.

fig.26).

ressure-ventvalvegasketinbottom

ositionvalve inrecessintank(with

sitionnewgasketonmountingface

securewithfour capscrewsand

entCover(par.53.,a.,(42)

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3

el94

was usedinM4A4productionfrom

alnumber6204, andfromvehicleserial

7794(figs. 71and73).Beginningwith

ntilatedtypeofclutchenteredproduc-

atedtypepermitspassageofairthrough

elringgear,flywheelandfan assembly.

sofseparatingthedriven disksand

theventilatedtypeof clutch.These

eable.However,iffullventilatingresults

ytoreplacethefanassemblywiththe

ntilatedtypeofclutch.

disktype,mountedinside thefly-

stforwardoftheradiator.It consistsof

randone inner),onedrivingplate,one

embledto theflywheelring.

nacarrierwhichis assembledto

remountedflatto theflywheelring

MediumTankisdissimilartothe

mTanksin thattheclutchfacingsare

outerandinner)insteadofbeing riveted

pressureplate.

astortype areusedinthe early

pereleasebearingenteredproduction

s.Bothtypesof bearingsareshownin

tobreaktheflowof powerbetween

siontofacilitateshiftingotgeais.When

ad oftheclutchspringspressesthe

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s oftheclutchtogethersothat they

gpowerfromthepowerunitto thepro-

sengaged,this springloadisreleased,

tei ndependentlyofthedrivendisks,

omthe powerunit.

urethepedalhasapproximately

Donotrestfooton clutchpedalwhen

mbled(FullyEnclosedType)

LYWHEEL,

ofoperationsinvolvedinthere-

chandflywheel,thefollowinginstruc-

dtypeand theventilatedtypeclutch.

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RENCH,^-in.

NCH,ft-in.

ket,l}-in.

ROMVEHICLE(par.52.,b.)-

,socket,l}g-in.

removefromshaft(sidecutting

of flange(turncounterclockwise)about

).Donotremovenutfromshaft at

NGTOFLYWHEELBOLTNUTS(figs.71

-in.

reedrive plateseparatorpinsthree

-in.wrench;screwdriver)(fig.72).

outerperipheryofclutchflywheelring

tensionevenlyaroundring(^4-in.

elandalsotheflywheelring,atone

nreassemblingofparts (steelhammer;

NGANDPRESSUREPLATEASSEMBLYFROM

k,%-16x4-in.

)

eeve,attachsling tochainhoistand

nholdingclutchinalinement.Tapedge

splaces,on outeredgeofring(to assist

(brasshammer).NOTE:Shouldfly-

screwonejackscrewin eachofthe

ose(figs. 71and72),tighteningthem

orcedawayfromflywheel.Removejack

omflywheel(A-in.wrench).Withdraw

ssemblyslowlyawayfromflywheel.

assemblyasoutlinedabove,thespindle,

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disksareremovedatthesametime.

ytoapointwherethespindle isfreeof

notthe drivingplateandthetwodriven

theyare,besureto holdinplaceto

theeventthe drivingplateandtwo

openingintheflywheel,liftthemout of

llnotbe damaged.

FLYWHEELRING.

k

erofdriveflange,withfingers,and

ckpunchendofspindle,andflangeto

eelhammer;prickpunch).Tapendof

er,toforcespindleout ofboththe

ammer).

UTANDFRONTCONE(fig.80).

OCK,wood,2-in.x4-in.x

tainingpin, liftflatwasheroffre-

mnut (sidecuttingpliers).Placea

81)betweenoneblade ofthefanand

hefanwhileremovingconenut.Insert

rthroughtwoofthe34-in. roundholes

deofnut,turn nutcounterclockwiseand

nedwith550 to650ft.Ibs.torque,

nsiderablepressurewillberequiredin

emovingthisnut,holdthetwohalves

d damage.

HEELFROMPOWERUNITDRIVENSHAFT

hhub

adedsectionofclutchhubandpull

werunitdrivenshaft.Afterremoving

flatsurface,toavoidanydamageto

M-A4-4).

.77).

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neandspreadcone,veryslightly,to

offshaft.

WHEEL.

HAMMER,brass

NCH,prick

nflatsurface,withopeningin fly-

elandfanforidentificationpurposesfor

erandrestiton awoodblock12-in.x

ocatedinsideopeningin fan).Drivethe

boltsoutof flywheelandfanassembly

arytouse theDRIFT,steel,^-in.x10-in.

OTE:Holdfanwhileboltsare being

etofanfalling.Turn assemblyoveron

level,liftfanoffflywheel(twomen).

H

dFlywheel ShowingMethodtoUse

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nandthat allunserviceableparts

ANASSEMBLY.

MER,rawhide

HOIST

2-in.x12-in.x12-in.,withopeningdown,

ceabar acrossthesmallopeninginfan

aisefanin positionaboveflywheel

ert threeflywheeltoflywheelring

an (evenlyspacedaround,fan).Keep

aceover flywheel,aliningproperly

nand flywheel.NOTE:Iffanis

ttolowerfan completelyoverflywheel

sis necessary,givefanaquickheatby

anwitha blowtorchorsubmergingin

hus permittingflywheeltoenter

inplaceonflywheel,removehoistand

oforcefanoverflywheelwithout

essary),however,itmaybenecessary

dFlywheel TappingwithHammer

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ammer,asshowninfigure76to assemble

necessarytotap withrawhidehammer,

heelringgearonly,to avoidanypossi-

ch;rawhidehammer).Tapthethree

driventhroughtheflywheeltheirfull

erttheothernineflywheeltoflywheel

ndtapintoplace.

ubRearCone

77).

enremovedfrompowerunitdriven

anandfreefrom burs(bothoutside

ebrass coneonthepowerunitdriven

he coneawayfromthepowerunit,

derontheshaft.NOTE:Ifconeis tight

slotandspreadconeslightly.

DFANASSEMBLYONPOWERUNITDRIVEN

nandmakesure therearenoburson

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e separatorpins(onclutchesso

heel(withsmallendof pinenteringfirst).

dinholesandthat theycontacttheir

eofflywheel(fig.80). Havetwomen

nd,withanothercheckingalinementof

lywheelAssembly

bFrontCone

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erunitdrivenshaft,pushingassembly

8).NOTE:Wheninstallingthisassembly

surethe flywheeltoflywheelringbolt

oidanydamageduetoboltsstriking

NDNUT(fig.80).

LE,mill

nandmakesureallburs havebeen

used,separatethe twohalvesby

offflush withconebody(millfile)

powerunitdrivenshaft(turnclockwise),

nutinplace.Placethetwohalvesof

bledoverflangeonnut, andthesmall

nit)inpositionand screwnutontoshaft

odenblock,2-in.x4-in.x18-in.,between

HOLE

FrontCone

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entturningoffaninthe clockwisedirec-

helargeholesin nut,and,turning

50-foot-poundstorque.

UTRETAININGPIN(fig.82).

powerunit drivenshaftalineand

ameterof shaft,throughhole,position

HubFrontConeNut

cotterpinthroughholeinretainer pin

erpinaroundretainerpin.CAUTION:

outsidesurfaceofnutascentrifugalforce

twardandshearthecotterpin.

YWHEELHUB.

VENT,dry-cleaning,andmakesure

emovedfromthespindlebearing(inside

plycompressedairto thelargeopening

SOLVENT,dry-cleaning.Wipespindle

beenremoved.Packrollerbearing

oneNo.44or equivalent.Fillcavityon

elyflushwithinsidediameterof bearing.

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oneNutinPosition

dle

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eNo.44,ongreaseseal leather.Position

into hubthefulldistance.

DRIVENDISKINFLYWHEEL(fig.84).

surethe splinesinhubare freefrom

eparatorpins inflywheelandmake

ondisk(withbodyofhubsectionaway

dleand insertintoflywheelthefull

EINFLYWHEEL(fig.85).

sureall bursareremoved.Position

owspointingin counterclockwisedirec-

gplatewiththe sixflywheeldrivingpins

flywheeluntilitrestsagainstthe three

nreleasepressure,to besurethesepara-

latetoposition.

ERDRIVENDISKINFLYWHEEL(fig.86).

surethe splinesinhubare freefrom

hub sectionawayfromflywheel)on

tagainsttheclutchdrivingplate.

enDiskinPosition

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RROWRAPD24432

teinPosition

NGANDPRESSUREPLATEASSEMBLY

in.

ringinflywheelringhub with

ckflywheeltoflywheelringboltsand

dtowardradiator.Loosenlocknuts

ee driveplateseparatorstudsatleast

se)(screwdriver).Havetwomenlift

ofspindle,alinetheprickpunchmarks

g,andslide assemblyontospindle.

semblyontospindle,makesurethe

yalinedandthatboltsare notpushed

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E'RAPD24433

enDiskinPosition

OLTNUTS(fig. 88).

ocket,3/^-in.

RENCH,torque

wheelringbolt nutsandtightenevenly

que,(34-in.socketwrench)(torque

saryto holdboltsfromturningwhile

gh openingbetweenfanbladesand

nch).Useascrewdriverandturn each

rstudsuntiltheyrestagainst plate,then

oldstuds inthispositionandtighten

HAFTFLANGE.

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lywheelRingandPressure

ngeandendofspindle,slide flangeon

sshammer.

HER.

,socket,l^-in.

dleandscrewnutin placeonspindle

poundsoftorque(1}j|-in.socketwrench).

ionsof nutandthroughholein spindle

decuttingpliers).

CHFORPROPERRELEASEBEFOREINSTAL-

VEHICLE.

angeofclutch releasesleeve,place

flywheelring,press baragainstwood

in.awayfromclutch.Withsleevein

reelyby hand.

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elRingtoFlywheelBoltNuts

FANASSEMBLY.

ffanbladesandradiatorshroudand

f starterhousing.

NVEHICLE(par.53.,a.).

lspringloadon theclutchdriving

essarythattheclutchpedalhavefree

elshouldbe2y2-in.NOTE:Asclutch

avelis reduced.CAUTION:Ifthe

reno freetraveloftheclutchpedalis

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tly disengaged,resultinginexcessive

chfailure.

delswithoutturnbuckle)(fig.89).

WRENCH,open-end,%-in.

,open-end,1-in.

od(Longrodrunningthrough

WRENCH,%-in.

,open-end,^8-in.

verandremovethecover(forward

nel),directlybelowthefrontuniversal

-wrench).NOTE:Donotremovethe

oint.Loosenthe clevislocknutby

,abouttwoturns (%-in.open-end

ispinand pullclevispinfromclevis

tionalclearanceforremovingthispin

celeratordowntoswingthrottle shaft

ingsforPedalAdjustment.

chclutchreleasebearingandthefront

).NOTE:Haveone manholdthese

ustmentisbeing made.

erAdjustment.

agedposition(until itrestsagainst

sembledattimeofmanufacture,the

garmismountedon thecrossshaftby

arksinboththe armandtheendof

arytoassureproperoperationofclutch

regoing,itisvitallyimportantthatthe

mainassetattime ofmanufacture.

edonshaft,thecenterofholein arm,to

ached,willresteightdegreesaheadof

indexmarksonarmandshaftand to

everifiedbyrotatingarmuntil index

ndnotingpositionoflowerendof arm.

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Connect.

,open-end,T^-in.

weenclutchreleasebearingsand

ndclutchpedalinthe fullyengaged

eleaserod,byscrewingclevisforward

vispinopeningsinclevisalinewith the

arm andpermitinsertionoftheclevis

arm(fig.89). Recheckbacklashclear-

dreinsertingthemtomakecertainthat

cotterpin throughholeinclevispin

tosecureinplace(side cuttingpliers).

nstclevis (^s-in.open-endwrench).

enclutchreleasebearingsandrelease

gCoverPlate.

gdirectlybelowfrontuniversaljoint

ousingandsecurewithfourcap screws.

equippedwithturnbuckleon

WRENCH,open-end,1-in.

.

pen-end,1-in.

ovecoveronrightsideof propeller

el)(}4-in.wrench).Turnlocknut at

wiseuntilitisclearofturnbuckle(1-in.

g.89).

WRENCH,open-end,1-in.

gagedposition,adjustturnbuckleuntil

dfreely betweentheclutchreleasefork

gageblocksinplace,tightenturnbuckle

hatgageblockscanbeinsertedbetween

en-endwrench).

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gCoverPlate.

opellershafthousingand securewith

bricatedonthe earlyproduction

e powerunitairinletgrille andapplying

ughalubricationfittingoneachrelease

on,tubesareattachedtoeachrelease

junctionblockonthebulkhead,directly

ationfittings,accessiblefrominside

achedtothisjunctionblockbymeans

of lubricatingtheclutchreleasebear-

partment.

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VERSALJOINTS

erbearing97

bearing98

nterbearing99

02

pjoint103

ftinthe M4A4tankcomprisesa

dtoashorterrear shaft.Thefrontpro-

atthetransmissionendandis connected

mpanionflangebyeight bolts.The

na rubberinsulatedpropellershaft

dbybracketsfromthehull floor.The

universaljoints.Thefrontuniversal

rshaft(fig.90),isattachedbyfour bolts

ntpropeller shatt.(NOTE:Invehicles

mthe enginegeneratorisinstalledin

enerator,thusinstalled,isbeltdriven

ntpropellershaftrearflange).Aslip

ompensatesforlongitudinalmovement

wertrain.

ovepropellershafthousingcovers

bolts securinguniversaljointflanges,

nterbearingsupportboltseverytwenty-

tire propellershaftassemblywhen

versaljointsorcenterbearing (unless

at whichtimethefrontorrear shaft

dfromthe vehiclethroughthepower

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VERSALJOINTS

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RSHAFTCENTERBEARING.

-'m.

,socket,l{$-in.

n.

ER.

curepropellershafthousingcover.

ALJOINTFLANGESATCENTERUNIVERSAL

in.

orproper locationinassembly.Re-

herswhichsecurerear propellershaft

rearflangeatcenterbearing.

RSHAFT.

upportrearpropeller shaftsoitis

FRONTPROPELLERSHAFT(fig.91).

,socket,1\%-in.,

ft,for properlocationinassembly,

ers),nut(l-J-jj-in. socketwrench,exten-

ngefromshaft.(Usepullerif necessary).

PLE(fig.90).

enterbearinghousing(turncounter-

NGHOUSINGBRACKETS(fig.90).

oneat topofcenterbearinghousing

rreinstallation.

NGHOUSING(fig.90).

haft.Onegreaseretainerwillcomeout

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IVERSALJOINTS

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NG(fig.90).

aininggreaseretaineroffshaft.

operlycleaning andaliningbearing.

damagedpartsandprelubricategrease

SHAFTCENTERBEARING.

,socket,lj$-in.,

n.

NGINSUPPORTBEARINGHOUSING.

bearinghousing.Positionagrease

.With"turnedin"lips,besure that

edinthe housing.

HOUSINGONSHAFT(fig.90).

propellershaft,beingcarefulnotto

ROPELLERSHAFT(fig.90).

,socket,l{$-in.,

dofshaftandflangeand installflange

onwasherandnut,tightening nutto

propellershaft(lf|-in.wrench).Insert

nsand holeinendof shaftandbend

ecuttingpliers).

PPLE(fig.90).

ngin sidebearinghousing.

NGHOUSINGINBRACKETS(fig.90).

sand installcenterbearinghousing

s.Positionbrackethalvesto alineattach-

eftside)throughupperhole,install lock

(fromleftside)throughthethree lower

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VERSALJOINTS

bracketsupports,installlockwashers

urely(wrench,^-in.).

CENTERBEARING(fig.91).

ickpunchmarks,insertthefourbolts,

ighten securely.

g.91).

e,tolubricantnippleuntilitis forced

LERSHAFTCENTERBEARING.

catedinthe right-handsideofthe

videsameansoflubricatingthe center

very1,000miles.

FTHOUSINGCOVERS.

dl iftupsectionofturret floor

achthroughopeninginfloor,remove

housing,andliftcoveroffhousing.

g.91).

e,tolubricantnippleuntilitis forced

AFTHOUSINGCOVER.

curewiththe capscrewsandlock

RSALJOINT.

2-in.

FTHOUSINGCOVERS.

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dl iftupsectionofturret floor

ersaljoint.NOTE:Thiswill notbe

coveristo bemoved.Reachthrough

crews,onboth rightandleftsides of

curescovertohousing.Liftcoverfrom

lJointBearingOutofYoke

INTBEARINGCOVERPLATES(fourcovers

.

removetwocapscrewsfromeach

ytorotatepropellershaft inorderto

oint.

INTBEARINGS(fig.92).

side ofyoketoforcebearingoutof

yoketoforceotherbearingout.

INTCROSS(fig.93).

ufficientlytoprovideclearanceat

movalof cross.Liftcrossfromyokes.

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VERSALJOINTS

ALVE

alJointCross

OINT.

ctpartsfordamageor excessivewear.

S.

sadvisabletoreplacecompletelywith

seseals.

INTCROSS(fig.93).

weenyokesbyrotatingpropellershaft

gs.NOTE:Positioncrossin yokeso

ssoppositeflange.

INTBEARINGS(fig.94).

ringsto holdinposition.Insertin

ersaljointcrossin bearingsastheyenter

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alJointBearingRAPD24414

ERPLATES(fig.95).

ringsoasto receiveprojectiononinner

onretainercoverscrewlockplateand

ockingscrewssecurelybybending

sof capscrews.

AFTHOUSINGCOVERS.

verremoved)andsecurewithcap

OINTS(par.102.,b.).

RSALJOINTS.

providedwith alubricantnipple,

s(fig. 91).Areliefvalve,locatedonthe

videdtorelievepressurebuiltupby

se,intothebearings.Theonelubricant

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VERSALJOINTS

icationforthe fourbearingsineach

,000miles.

ATE-^RAPD24417

alJointBearingCoverPlate

FTHOUSINGCOVERS.

dl iftupsectionofturret flooi

ersaljoint.NOTE:Thiswill notb

coveristo beremoved.Reachthrough

crews,onboth rightandleftsides oi

curecovertohousing.Liftcoverfrom

figs.90and91).

e,throughlubricantnippleuntilitis

oppositeside ofcross.

AFTHOUSINGCOVERS.

housingandsecurewiththe lock

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LLERSHAFTSLIPJOINT.

arpropellershaftrearslip joint

ingtheslip joint.Attimeofassembly

rewedintothisopeningthus necessitating

nstallationofalubricantnipple,when

Agreaseretainer,topreventlossof

d oftherearslip jointyoke.Itisheld

ateslipjointevery1,000miles.

y2-m.

FTHOUSINGCOVER.

dl iftsectionofturretfloordirectly

apscrewswhichsecurecovertohousing

ig.90).

yoke(screwdriver)andinstalla

djustablepliers).Unscrewknurlednut

lug(turn counterclockwise),apply

ughnippleuntilitis forcedoutfront

nurlednuton yoke,withfingers.

tablepliers),andinstallplugin open-

wdriver).

AFTHOUSINGCOVER.

achwithcapscrewsandl ockwashers.

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07

er110

oolerIll

.

transmission,differential,and

rwardspeedsandonereversespeed.

ransmissionandis operatedbyalever

Use thisbrakeonlyafterthevehicle

a"controlleddifferential"because

ginepowertothefinaldrive unit,but

thepurposeofsteeringandstopping

itpowerfromthecontrolleddif-

gsprocketsthroughasetof reduction

oltedtoeachsideof thedifferential

tedtothe hub.Thefinaldriveunits

gthepowertrainfromthe vehicle.

RAIN.

sareauthorizedto removeandin-

eplacementofapower trainwith

donebyusingarmsunlessauthoriza-

ersonnel.Removalofthepowertrain

ceoperationthatwillrequireseveral

muchofthe operation.Onmanyoi

mustbeheldwithin thevehiclewhile

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outside.Nospecialtoolsare requirey fy

JJLJJLJJLiJIJJlJJUJIJJLUIJJIJJUJLLJ LULLJLLJ LLJLLJ LULLJLLJ

cDcOcOcOcOcOcjQcOcOcOcCicClcOcDcOcOc OcOcO O3

zzzz

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gebatteriesareconnectedinseries

stemat24volts(figs.121, 154,,156).

batterycompartment,locatedonthe

ngcompartment,behindthedriverand

dofinspectionwillvary.In hot

ynecessarytokeeptheelectrolyteat

ratinginextremehottemperatures,as

emademore frequently.Keepthe

vetheperforatedbaffleplates.These

ningin eachcell,afterremovalofthe

en-end,s/8-in.

en-end,V2-in.

ofturretfloordirectlyabovebattery

turnasdirectedonknob(fig. 121).

(twooneach side)whichholdthe

fbox.Loosennuts whichsecurecable

counterclockwise)(Vi-in.open-end

eninginsplitconnector,tospreadcon-

ypost. CAUTION:Donottwistcable

kelytotwistthebatteryterminaloff its

ningthebattery.

ryBox.

lddownstrapsandli ftbatteryout

RENCH,open-end,s/8-in.

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thpoststo receivecablesatendof

21).Placebatteryholddownstraps

ten.

xCover.

connectorswithpetrolatum,toprevent

ostandtightennutssecurely.Install

fourclampsinposition.

ocatedontheleftsideof thebattery

terypoweratthesource.A second

meboxforcuttingoffofthe radiocircuit

h,pulluponhandleandturn itto

en-end,s/8-in.

RENCH,socket,V2-in.

r.161,c.(1)(a)).

igs.121,156,161).

en-end,s/8-in.

separatesbatteriesfrombatterycon-

terofswitchknob(screwdriver)and

nutsandremovecablesandstrap con-

open-endwrench).

RENCH,socket,Vi-in.

hichattachthe switchmountings

x(Vi-in.socketwrenchoninsideof

eofbox).Removethetwobolts

tingbracketandseparateswitch

h(2)).

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ket,V2-in.

)

ket,V2-ia

knobandremoveknob(screwdriver).

urewithtwoboltsand nuts(iVm-open-

witchthroughopeninginbatterybox

bolts andnuts(Vi-in.socketwrench

wrenchonoutside ofbox).Secureknob

knob(screwdriver).

alpostsandsecurewith attachingnuts.

stallBoxCover(par.161.,d.,(1),

belt-drivenstraightshunt

ig.159)consistsofthegenerator,genera-

breaker(par.162.,j.) battery(par.

tmeter(par.170.).

ppedwithmultipletypewater

ountedto-No.2engineanddriven

elt(fig.20).On powerunitsequipped

neratoris mountedinthefighting

mapulleyon thepropellershaftflange

RTENSION(pars.86.,d.and162.,h.,

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ATURE!_

WITCH

E

LOT

.

.

.

.-

W.NO.

W.NO

W.NO.

W.NO.2

W.NO.1

InstrumentBox

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ptype).

,socket,38-in.,

on

cket,V2-in.,

n

en-end,s/s-in.

spanner,closed

ntRearDoors(par.52.,b.,(6) ).

entCover(par.55.,c.,(1),(b) ).

ry Switch(par.52.,b.,(1)).

ig.159).

,socket,V2-in,

extension

neratormountingnuts andliftgenerator

swhichsecurewires toterminalsinside

s(3/8-in.andVi-in. socketwrenches,

ewknurlednutwhichsecuresconduit

esfrombox.

.,).

ar. 65.,b.,).

ketfromEngine.

,open-end,s/8-in.

gpliers),removescrew(screw-

ecuresfuelline totopofgenerator.

neratormountingnuts andliftgenerator

nch).

mp-type).

,socket,3/8-in.,3-in.

ket,V2-in.3-in.

en-end,s/8-in.

spanner,closed,

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onEngine(fig. 20).

,open-end,s/8-in.

mountingstudsand securewiththe

negeneratorpulleywithdrive pulley

n whenoperating.Tightennutsse-

urpal nuts(s/8-in.open-endwrench).

orshieldandsecureclip withscrew

ar.65.,c.,).

eratorDriveBelt(par.87.,c.).

,socket,Vi-in

3-in.extension

de ofterminalboxandtightenknurledf i

l wiretoterminal"F"andsecurewith

h,with3-in. extension).Connectlarge

hwasherandnut(Vi-in. socket:

lcoveronbox,tightenwing nut,i:

wingnutandstudand twistends

forOperation.

ntRearDoors(par.53.,a.,(44)

ntCover(par.55.,d.,(1)(f) )_

pe).

,socket,3/8-in.,

on

RENCH,socket,i/2-in.,w.

n.extension

ySwitch(par. 52.,b.,(1)).

retfloorisdirectlyabovegeneral

ver(^-in.open-endwrench).Loo:

,withfingers,andremovecover.

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par.162.,d.(1)(d) ).

dle(fig.160).

open-end,Vs-in.

ys-in.open-endwrench),loosen

iftup oncradle,todisconnectbelts,and

p-type).

,socket,3/8-in.with

n.extension

RENCH,socket,V2-in.,with

g.160).

open-end,7/8-in.

ingthedrivebelts ingroovesof

oweredin position).NOTE:Locate

adlefitsinholein generatorframe.Lower

ndsecurewith thetwomounting

ngboltsocradleis freetomoveupand

eneratorandcradlesothereisV2-in.

dwaybetweenpulleys)whenbeltsare

.Hold generatorinthispositionand

r.162.,e.,(1)(d) ).

curewithbolt(T7g-in.open-end

owersectionofturretfloor inposition.

-type).

T.

r.162.,f.,(1)(b)).

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generatoris freetomoveupand

dlesothatbeltshave Vi-in.deflection

eys)whenbeltsareplacedunder8-lbs.

thispositionandtightenlockbolts.

162.,g.,(1) (c)).

RENCH,IVs-in.

162.,f.,(1)(b)).

generatoris freetomoveupand

nge(par.97.,b.(2)).

slip joint)towardrearofvehicle

tsout ofgroovesinpulleyandremove.

S.

-in.

en-end,3/4-in.

both ongeneratorandpropellershaft.

es.

sition,sliderear propellershaftfor-

nectthepropellershaftflangeswiththe

provided.

2.,h., (1),(a),2.).

ecurewithcapscrews.

62.,g.,(1),(c) ).

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mptype,apply10dropsof OIL,

urs or1,000miles.Singlewaterpump

breaker,locatedonthebatterycon-

argingcircuitinthe eventofanover-

rries60amperesandwillopenat

anoneminute.Itmustbe closed

ngcircuitresetbutton(fig.121).

CH,open-end,TVin.

y(par.52.,b.,(1) )(fig.121).

Breaker.

curecovertobatteryboxand re-

betweenbatteryboxandcontrols.

nnectwiresfromterminalsoncircuit

BatteryBox.

CH,open-end,T7g-in.

-fo-m.open-endwrenchandun-

tcircuitbreakeroutofbatterybox.

CH,open-end,T7g-in.

eryBoxandConnectWires.

en-end,T7g-in.

tthe twobolts,holdnutsatbot-

handtightenwithscrewdriver.Attach

t,securingwithscrews(screwdriver).

eryBoxCover.

batteryboxand controls,install

clampsateachcornerof box.

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atorregulatorsareused,oneforthe

uxiliarygenerator.Theseregulators

eforetheywillbetreatedas such

sistsof threerelaysmountedona

unctiontoperform.Theseinclude

entrelay,thecurrent limitrelayand

ainsa filter,builtintothebase ofthe

ANCE.

d,otherthantomakesurethat

currentrelay,is anautomatic

dthebatterywhichclosesthecharging

gingandopensthe circuitwhenitis

batterydischargingbackthroughthe

sthegeneratoroutputto50 am-

nsthecircuitvoltagefairlycon-

oltsandcontrolsthechargetothe

morecompletelycharged,thecharging

oscillationswhichwould,other-

adio set.

,open-end,TVin.

H,open-end,V2-in.

ySwitch(par.52.,b.,(1)).

,open-end,Vi-in.

ngpliers),loosenthetwowing

ver.Removelockingwires,remove

ectwirefromterminal.Removenut

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wire(V2-in.open-endwrench).Un-

minalbox andwithdrawconduit

holdingclipto sideofsponsonand

pen-endwrench).

ntingPads.

m.extension.

ndliftregulator offpads.

,open-end,^-in.

en-end,V2-in.

pads(fig.121).

8-in.extension.

curewithfour nuts.

minalBoxCover.

,open-end,TVin.

H,open-end,V2-in.

de ofterminalboxandscrew

nduit.Connectwirestorespective

softerminalsand posts)andsecure

.Attachcovertoboxandtighten

gwirethroughholesin wingnutsand

ecuttingpliers).Secureconduitto

lt(-f^-in.open-endwrench).

ectricstarter,locatedbetweenen-

ughanopeninginthe radiatorcoreand

werunitfan.Thestartercircuit(fig.

r switch(fig.166),startersolenoid

(fig.161).

nspectionofthestarterislargely

ons,toseethat theyarekeptclean

arterdrivegeardoes notbecome

npinionscrew.

erswitchbutton(fig.166) actu-

solenoidswitch,thusclosingthecircuit

r.

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,socket,Tng-in.

cket,Vs-in.with

n

rySwitch(par.52.,b.,(1) ).

Grille (par.52,b.,(4)).

eof FanCompartment.

chshieldandliftshields fromcom-

oud(par.90,d.,(2), (c)).

lts,ForwardofRadiator.

,Vs-in.

ngpliers)andremovethetwo

ntCover(par.55,c.,(1),(b)).

52,b.,(18) ).

Unit.

,7/8-in,with6-in.

gpliers)andremovethetwo

with6-in.extension).Havetwomen

e starterVi-in.,tocleardowelpins

,socket,Tng-in.

cket,%-in.,with

t.

,socket,Vs-in.,with

ovebracketandslide unitthrough

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sition untildowelpinsarefully

ltson powerunitside,tighten

6-in.extension),andinsertlock-

sandtwistendsofwire tosecure

.,(26) ).

ntCover(par.55,d.,(1),(f) ).

ForwardofRadiator.

,socket,7/8-in.

ecurely(rg-in.socketwrench),

headsofboltsandtwist endsof

pliers).

witchbutton(fig.166) andtest

tchaftertest.

,(f)).

artment.

eitherside,andsecurewiththree

rille(par.53,a., (42)).

.161).

CH,open-end,%-ir--

ySwitch(par.52,b.,(1) >-

par.161,c.,).

BatteryBoxandControl*=*'

RENCH,open-end,s/8-ir-f

lonbatteryswitchanddiscon.*^^^^

-in.open-endwrench).Rent"*'-''-^

oidswitch(towardrear of

d'wrench).Removethetwo

oorof vehicle,and

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Box.

CH,open-end,3/8-in.

wrench,insidebox,andremovethe

ox.

h(fig.161).

CH,open-end,s/8-ia

rgeterminalpost,towardswitch

nectto batteryswitchterminal,when

curewithnut(s/8-in.open-endwrench).

(fig.161).

en-end,3/8-in.

ox,insertboltsthroughholesfrom

with3/8-in.open-endwrenchand

RENCH,open-end,s/8-in.

ver smallterminalpost(toward

h lockwasherandnut(3/8-in.open-

owwireoverothersmall terminal

andnut (3/8-in.open-endwrench).

leadsto shuntinoppositeendof

adingfromsolenoidswitchonbat-

ithnut(%-in.open-endwrench).

edthroughopeningin oppositeend

noidswitchand securewithnut

eenbatteriesandcontrolbox.

mconsistsofheadlights,taillights

andblackoutuse,"BO"drivinglight,

strumentboxlights(figs. 154,164

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ight,insidevehicle) tolength

one quarterturn.Withplungerin

ghtfromsocket.

utsideofvehicle.Pullplunger

e)tolengthoftraveland turnto

sintoplace.Releaseplunger.

ENCH,open-end,IWin.

.

rtosponsonandr emovecover.

reswireconduitto lightandpull

hichsecureslightto hull,tiplightslightly

ut.

RENCH,open-end,lV4-in.

lytowardfrontofvehicleandinsert

mountingnut(IV^-in.open-end

tand tightenknurlednut.

inginsponsonand securewith

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warningindicators

ateretainingscrews

teretainingscrews

t

ch

catorO

*

onoiltemperaturegage4,

t;

onoiltemperaturegageselectorO>

ectorswitch

arningindicator

h

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H,open-end,V2-in.

elighttorigidconduit.Remove

ghtcover(screwdriver).Remove

elightswitch(screwdriver).Remove

ndswitchshell(screwdriver)andlift

htoshellandseparate.

H,open-end,V2-in.

ewith mountingnut.

.

dsecurewithtwo attachingscrews.

handsecurewithscrew.Install

twoscrews.Connectrigidconduit

nut.

DINSTRUMENTS.

iningtotheoperationoftheve-

entbox(fig. 166),locatedinfront

strumentsare mountedonthein-

ovable,beingheldinplaceby six

ionofthespeedometerandtach-

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movethecoverfromthebox,before

peedometerandtachometercanbe

ver,directlybehindeachinstru-

sandnuts.Inorder toeliminate

allationof thevariousinstruments,

einstrumentbox coveriscovered

below)andunder"CoverInstallation"

ncestoright,left,upperand lower,

uswireswheninstallinginstrumentsin

the locationsasshowninfig.168.

eknurlednutson eachofthe

ectorstoseparate.

ewsandliftassemblyfromhull.

.

withthesixcapscrews.

orsintosocketinbackofinstrument

or)andpressinto socket.NOTE:When

etoalinethekeywayinconnectorwith

table

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ews.

crewsandremovefromcover(screw-

entBox.

uresthespeedometerresetcableto

corneroftheinstrumentbox(turn

bleconduitto therightandoutof the

yfrombox.

bleinPositiontoInstallCover.

ening incoverdirectlybackof

mallholeinrubber grommetandinsert

ox.

ingininstrumentbox andslideflange

UTION:Besurethatall wiresareinside

n,toeliminateanydangerof cuttingthe

tboxwithsixcoyerattachingscrews.

(fig.166)isamagnetictypeand

nectedtoanadaptermountedonthe

he vehiclespeedinmilesperhour,as

andaccumulatedmileage.Aresetknob,

righthandcornerofthe instrumentbox,

rbyaflexiblecable,permitsresetting

ORESETASDESIRED.

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V2-in.

V2-in.

boxandremovethethreenuts which

entbox,directlybackofspeedometer

nutwhichsecuresspeedometerreset

mofinstrumentbox,attheright hand

andoutof theslottedbracket(pliers).

eopeninginthecoveron backofin-

etfromcable.Pullcoverawayfrom

ox.

socket,3/8-in.

mentboxandremovethetwonuts

cketwhichsecuresspeedometerto

nscrewnut,incenterofspeedometer,

dometer(adjustablepliers).Push

gincoverandremove.

V2-in.

r.

sincoverand instrumentboxand

throughopeninginboxand place

ndsecurewiththe twolockwashers

/8-in.socketwrench).

eningin instrumentboxbackcover

rtingsquareendofcablein openingin

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thenutonendof cablehousingontothe

meter.Tightennutsecurely.

sand securewiththeself-locking

trubbergrommetinopeningin cover

onduitpassingthroughsmallholein

uitintoslottedbracketonlowerside of

ecureto bracketbytighteningknurled

V2-in.

omTransmission(fig.9).

reshousingtoadapteronright side

ratehousingfromadapter.

omInstrumentBox.

V2-in.

)).Reachthroughopeningin

ewknurlednut,incenter ofspeedom-

gtospeedometer.

ndwithdrawcablefromspeedometer

mecableisto bereinstalled,bevery

dirt

akesure cableisfreeofsharp kinks.

sertoppositeendinhousing,rotating

ghhousingthefulldistance.

eedometer.

all openinginbackcover,insertsquare

nspeedometer,installknurlednutand

nbackof instrumentbox(par.166.,d.,

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nsmission(fig.9).

centerofadapter,installknurlednut

usedtoregisterpowerunit revo-

ncorporatedinthesameunit records,

revolutions(fig. 166).Itisdrivenby

ngtothetachometerdriveonthedis-

.20).

V2-in.

boxandremovethethreenuts which

trumentbox,directlybackoftachometer.

tbox.

finstrumentboxandunscrewknurled

eroftachometer.

InstrumentBoxCover.

finstrumentboxandremovethe two

rethemountingbrackettotachometer,

ontofinstrumentboxcover.

socket,y8-in.

mentBoxCover.

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ngininstrumentboxcover(fromfront

hthroughopeninginbackof instru-

cketoverthetwostuds intachometer

washersand nuts.Tightennutsse-

ughsmallopeningin thesmallcover

umentbox,insertthe squareendof

gincenteroftachometerandsecurethe

rwithnut.Tightennut securely.

singandplacein positionoverthree

threeself-lockingnuts.

IV8-in.

omNo.1Engine(fig.20).

1Vs-in.

oors,wheredoorsoverlapandopen

ors(li/8-in.wrench).Unscfewknurled

ometeradapterondistributorendof

Slideknurlednut awayfromendof

romendofcable(if soequipped).

omInstrumentBox.

V2-in.

umentbox(par.167.,b.,(1),(a)).

mentboxandunscrewknurlednutwhich

meter(adjustablepliers).

ndwithdrawitfromtachometerendof

leistobereinstalled,be verycareful

withdirt.

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akesure cableisfreefromsharp

nd insertoppositeendinhousing,forc-

ce.

trumentBox.

all openinginbackcover,insertend

nteroftachometerandsecurehousing

hometer.

.,(1),(c) ).

.1 Engine(fig.20).

IVs-in.

ofcable(whereso equipped),insert

meteradapterandsecurehousingto

owerunitcompartmentreardoorsand

rench).

kismountedonthe leftsideof

ld inplacebyamountingclampand

ngand resetting,protrudesthroughthe

urnknobclockwise.Toresetclock,push

y.

tsandunscrewnutsfromstuds.

udsandwithdrawclockfromfront

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strumentboxcover,alineproperly

hetwostuds.Securemountingclamp

placebypassinglockingwirethrough

endsofwiretogether.

GE.

egage,mountedatthelowerleft-

cover,registersthe temperatureof

din thetransmission(fig.166).Itworks

tmountedon thepowerunitscavenger

and 35)andasimilarunit mountedon

tube(fig.100).Selectionfortherespec-

rationof theTowerUnitandTrans-

electorSwitch"(fig.166).

unitand transmissionoiltem-

.166)towardsidelabeled"ENG."and

etemperatureofpowerunit oil.Push

ide marked"TRANS."andnoteread-

atureoftransmissionoil.

h(fig.168).

alpostsandlift wiresoffposts.

ethetwomountingclampstogage,

andwithdrawgagefromfrontofin-

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xCover.

ver,alineproperly,placemounting

dsandsecurewith twolockwashers

upperterminalpostand securewith

e,whichleadstoselectorswitch,over

thself-lockingnut.

reGageSelectorSwitchRemoval.

RVER

entBoxCover.

h,wherebossofswitchprotrudes

ersandwithdrawswitchfrombackof

ethethreewiresfromswitch.

eGageSelectorSwitchInstall

RVER

168).

screwsfromthethreeswitchter-

nabovethe openingininstrumentbox

hicharemountedoffcenteron the

regage.Connectthelargewhitewire,

andsecurewithscrew.Connectthe

heleft terminalandsecurewithscrew.

e centerterminalandsecurewithscrew.

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BoxCover(fig.166).

omswitch,insertswitchthroughopen-

andpositionswitchsothatthe threeter-

nterontheswitch)are neartheoil

overbyinstallingthe knurlednuton

whichprotrudesthroughcover.Hold

securely.

ageSendingUnit.

nitismountedonthe scavengeroil

casetopowerunitoilcooler(fig. 35).

RATUREGAGESENDINGUNITRE-

en-end,1-in.

Hull(par.52.,b.,(7) ).

Tube(figs.35 and37).

en-end,1-in.

onendofunit (screwdriver),sepa-

enterofsendingunit .Unscrewunit

wise)(1-in.open-endwrench).

RATUREGAGESENDINGUNITIN-

en-end,1-in.

be.

en-end,1-in.

gcompoundandscrewsendingunit

hichfacestowardcrankcase(figs.35

nsecurely(1-in.open-endwrench).

end ofwireintoopeningincenter of

unitandsecurewithtwoscrews

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connectionforoilleaks.

.,a.,(41) ).

PERATUREGAGESENDINGUNITRE-

n.

gUnit(fig.100).

thescrewsandremoveshieldfrom

ypullingon wire.

g.100).

counterclockwise).

PERATUREGAGESENDINGUNITIN-

n.

compoundandassembleunit in

nsmissionoillineoutletconnection(fig.

erofunitandpush allthewayinto

e).Bendwire soastofit inopening

dandsecurewiththreescrews.

edatlowercenterofinstrument

nthecircuit.It isconnectedthrough

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fingers(topreventturningof

rsandwithdrawunitthroughface

6).

over(fromfaceofcover)andposi-

reachmountingstud onunitand

neach stud.

)overthe terminalpostandsecure

near terminalpostwithfingers(topre-

nnutsecurely.

catestheamountofcurrentin

gingfromthebattery.Theamountof

epowerunit speedandelectricalunits

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thfingers (topreventturningof

hichsecurethe twowirestoterminal

swhichsecurethemountingclamps

nitfromfrontofcover.

over(fromfaceofcover)andposi-

reachmountingstud onunitand

neach stud.

ed "A")overright-handterminal

fingerstoholdwirein place.Placethe

erleft-handterminalpost andscrew

utin place.Holdwirewithfingersin

withmountingstud orotherinstru-

ageregistersthe pressureofthe

system(fig.166).Itis connectedto,and

edonthe undersideofNo.4engineand

4engine(onpowerunitsequipped

ig.24).On powerunitsequippedwith

ismountedontheupper sideofNo.3

lleryof No.3engine(fig.23).Con-

ontheengine andtheoilpressure

ectrical.

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thfingers (topreventturningof

hichsecurewires toposts.

sherswhichsecuretheclampsto the

andwithdrawunitfromfrontofcover.

fromfaceofcover)andpositionin

clampsoverthemountingstudsonunit

andnuts.

d"H"),whichentersloomnearspeed-

Documents

TM 9-754 M4A4