TM-894 SEMITRAILER OMAHA F 16

8/22/2019 TM-894 SEMITRAILER OMAHA F 16

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NICALMANUAL

L

YCORP.MODELF16)

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



ICALMANUAL

CORP.MODEL F16)

Y 1944

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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ay1944

15-tonGross,2-wheel(2dt),VanSemi-

odyCorp.ModelF16),ispublishedfor

nceofallconcerned.

1

6-44)J

ARYOFWAR:

bedinpar.9.a.,FM21-6;X.

ls,seeFM21-6.)


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...........................1-24-5

............3-46-9

INSTRUCTIONS

peration............5—610—16

ATIONALMAINTENANCE

............................7-817-23

emain-

......9-1323-28

ntive

.......1429— 38

...............15-2338-46

s,and

55

................28-3955-78

sem-

87

3-4588-91

mbly........46-4791-96

................48-5396-107

.................54-57107-112

arrier....58-60113-114

EMAINTENANCEINSTRUCTIONS

........61-62115-117

4117-118

..................65-69118-124

................70-74124-127

dtemporarystor-

131

.78-80132-133

8


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GROSS,2-WHEEL(2dt),VAN

ANDARDBODYCORP.MODELFU)

ublishedforthe informationand

towhomthisequipmentis assigned.This

ationpertainingtotheoperationandmain-

oad,15-tonGross,2-wheel(2dt),Van

ardBodyCorp.ModelF16),aswellas

nitsandtheir functionsinrelationtothe

quipment.

n fourparts.

tainsintroduction,description,and

tructions,containsinstructionsfor

e.

onalMaintenanceInstructions,con-

ortheperformanceofthescheduledlubri-

enanceservices,andinstructionsformain-

aretheresponsibilityoftheusingorganiza-

elons).

aintenanceInstructions,containsin-

eofthethird andfourthechelonofmain-

tandtemporarystorage,andalist

estandardnomenclaturelists,technical

ncepublicationsapplicabletothevehicle,

dix.

cableforusein performingprescribed

wwithbriefexplanationsofeach.

26,DRIVER'SREPORT,ACCIDENT,

N.Onecopyofthisformwillbekeptwith

caseofanaccidentresultingininjury or

filled outbythedriveron thespotoras

eafter.

ructionswiththemateriel,thistechnicalmanualhasbeenpublished

chnicalreview.Anyerrorsoromissionswillbecorrectedbych

revision.


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RMNo.48,DRIVER'STRIPTICKET

ENANCESERVICERECORD.Thisform,prop-

shedtothe driverwhenhisvehicleis

missions.Thedriverandtheofficialuser

eindetail appropriatepartsofthisform.

sued forvehiclesinconvoyorontactical

ofthis formcontainsthedriver'sdaily

aintenanceservicereminderschedule.

.478,MWOANDMAJORUNITAS-

ECORD.Thisformwillbeusedbyall per-

ficationormajorunitassemblyreplace-

descriptionofworkcompleted,date,

age,andMWOnumberornomenclatureof

performingtheoperationwillinitialinthe

pairs,parts,andaccessoryreplacements

.6,DUTYROSTER.Thisform,slightly

chedulingandmaintaininga recordof

rations.Itmaybe usedforlubrication

.461,PREVENTIVEMAINTENANCE

LINSPECTIONWORKSHEETFORWHEELED

ES.Thisformwillbeused forall1,000-

mile(semiannual)maintenanceservices

nsperformedonwheeledorhalf-track

353,SPOT-CHECKINSPECTIONRE-

EHICLES.Thisformmaybeusedby all

eirstaffrepresentativesinmakingspot-

ehicles.

.468,UNSATISFACTORYEQUIPMENT

usedforreportingmanufacturing,design,

aterielwitha viewtoimprovingandcor-

orusein recommendingmodificationsof

be usedforreportingfailures,isolated

nctionsofmaterielresultingfromfairwear

age,norforthe replacement,repair,orthe

nt.It doesnotreplacecurrentlyauthorized

cerecords.

370,EXCHANGEPARTORUNITIDENTI-

roperlyexecuted,maybeusedwhenex-

emsforlikeserviceableassemblies,sub-

es,andtools.


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ANDARDBODYCORP.MODELF16)

r,havingavan-typebody,isde-

figs.1 and2).Thesemitrailercanbe

vehicleequippedwithaconventionalsemi-

svehicledoesnotincorporateahandbrake,

foruseasa safetymeasurewhenthe

thetowingvehicle.Theserialandmodel

hichissecuredimmediatelytotherearof

t,orcurb,side.Aspare wheelandtire

htheright-handframemember.Aretract-

edto theframeatthepoint oftheframe

ratedbyawormscrewandhandcrank

ftheframe.Thebodyis constructedof

entlymountedontheframe.Theframeis

edaxleandslip-end,semielliptical,springs.

entbymeansofadjustableradiusarms

ingsandeccentricadjustingpins.

enter-to-rear331in.

ll307in.

30V4in.

3SViin.

nter-to-floor)76in.

ll)74J/4in.

48%in.

67in.

ed)8,000Ib

,000Ib

aisedlandinggear14V2in.


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http://slidepdf.com/reader/full/tm-894-semitrailer-omaha-f-16 8/139 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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GROSS,2-WHEEL(2dt). VAN

NDARDBODYCORP. MODELFU)


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KDUMMYCOUPLINGEMERGENCYTAG

VICETAG

ET


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S

ON

eAirLineConnections.Thereare

catedatthefront ofthesemitrailer(fig.3).

tionislocatedon therightorcurbside,

connectionislocatedonthe leftside.

marked.Caremustbetakentoconnect

thetractortrucktothe emergencyconnector

wisetoconnecttheservicehose ofthe

ceconnectorofthetrailer.Air issupplied

ughtheseconnectionstooperatethebrake

iler.Failuretosecureeitherofthese con-

esinoperative.Theairlineconnectorsof

onnectedwiththeairhose ofthetractor,

ummycouplingsattachedbyshortchains

ler.Theconnectorsarekeptcoveredwith

endetachedfromthetractor,toprevent

eignmatterfromenteringthe airlines,and

hanismofthe relayemergencyvalve.

svehicleisequippedwith anelec-

3)locatedatthe centerofthefrontcross-

locatedmidwaybetweentheairline

protectedbyahingedcoverwhichisraised

mthetractortruckis attached.Theelec-

leris energizedfromthetractortruck

percableisinsertedinthe socket,andthe

abis turnedto"ON"position.

ckblocksareprovidedtoprevent

e semitrailerwhenuncoupledfromthe

g.5)islocatedon eachsideofthesemi-

totheframeat pointsapproximatelyabove

tin use,theblocksaresuspendedbeneath

ngsnapslocatedasufficientdistancein

aketheslackfromthe supportingchains

ainsareofadequatelengthto permitthe


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ON

rin frontofthedualtires orbehindthem,

groundmayrequire,whenthe semitrailer

actortruck.

rkerLightSwitch.Theblackout

t ofthevanbodyon therightorcurb

mthefrontcenterlineon whichthecoup-

switchisoperatedby meansofascrew-

ed inaslotin theswitchhead(fig.4).

eutralposition.Itis eitheronblackout

osition.Theblackoutcircuitis energized

wingtractortruck.

domelightswitchis locatedonthe

wardoftheupperleftdoor hingeline

olsalldomelights.

h

ar.Theretractablelandinggearis

hichoperatesawormscrew.Its functionis

semitrailerwhendisconnectedfromthe

t befullyloweredbeforethetractor

stnotbe operatedwhilesupportingthe


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canbe retracted,extended,oradjusted

n lockedpositionuponthefifthwheelof

atinghandleishinged,and mustbeswung

pportedupon itssuspensionhookwhen

CKOUTSWITCH

ARRIERNLANDINGGEAR

RAPD335733

tFront

eflexreflectorsarelocatedonthe

(fig.1),andfourred reflectorsareon

(fig.2).

Controls.

ngoperationof thesemitrailer

t-off"valveslocatedonthetractortruck.

olledbyswitchin tractorcab.

S.

TractorTruck(fig.6).

fullyintopositioninfront ofthe

wheelisreadytoengagethe kingpin;

heckforproper alinementoflowerand

sformakingconnection.


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ON

NCYAIRLINE-

MMYCOUPLING

OCKETCOVER

CABLE

AIRLINE\

UPLING\

HEELS

HWHEELPLATE

ngSemitrailertoTractorTruck

indwheelsoftrailer,removedumm

nectors,connectairhoseattachedtotracto

actortruckair line,andsetbrakeso

kingpinis fullyengagedinfif

ont ofthesemitrailersothat thelandii

ctwiththeground.


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GROSS,2-WHEEL(2dt).VAN


awsofthe lockingdeviceonthe

seethat theyarefullyclosed.Checklock-

n lockedposition.

ndreplacechockblocksuponsup-

ortruckforwardafewfeetto exertload

op.

deviceonfifthwheeltosee thatitis

ableoftractortruckto semitrailer

esttrailerlights.

full roadclearance.Hooklanding

derbodyofsemitrailerintoits suspension

dSemitrailer.

uplingoperationhavebeencompleted,

railercombinationisreadyfordriving,

meas aconventionaltruck.Whenturning

orthefactthatthetrailer wheelsturn"in-

thetractor.

onService(par.10).

ackingatractortruckand semi-

rightwheelofthe tractorouttoguidethe

hedriver'sright;cutthe rearoftheleft

rofthesemitrailerto thedriver'sleft.

ndSemitrailer.

in coordinationwithtractortruck

ofthetrailer brakesbeforenormaloperat-

kairsupplyon thedashgage.For

brakes,thepressuremustnotbe lessthan

mustnotbe requiredtocarrythe

railerbrakesareintendedtocontrolonly

m;abuseofthisfactwillresult inundue

atly reducethelifeofthesemitrailer

topwillbe madewhenthefirstbrakeap-

speedandroadconditionpermit,andgradu-

duced,sothatat theendoftheforwardmove-


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ON

ressure,remainsin thebrakechambers.

ebrakeslightlyatfirst andincreasethe

nishes.Sucha stoprequiresgreaterdis-

vehicleundercontrol,andthefinalhigh

verestop.Do not"fan"thebrakepedal,

erformanceandwastesbrakepressure.

thebrakelinepressure,but ratherdecreases

andreservoir.Theairbrakeis designed

al ismovedtothelimit ofitsstroke,an

sults,whichwillstopthevehicleinthe

sfullapplicationshouldbe madeonlyin

employedinordinarybrakingoperation.

efficiencyisalwaysreachedshortof the

TRAIL)

AP

sembly

FromTractorTruck.

es.Unsnapchockblocks,andplace

ailerwheels.Lowerlandinggearwheels

reperpendiculartoground.Pullplugof

gsocket,andhangcableplugonthe hoot

orthispurpose.Shut thecut-offcocksor


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erviceairlineson thetractortruck.Dis-

ouplingsonthe frontofthesemitrailer.

couplingswiththedummyhosecouplings.

bsideofthetractortruckfifth wheel,

acrossto theleftanddowninto thenotch

slideatthe extremeleftside.Withthe

ding notchinopenposition,drivethe

engagethefifthwheellockingmechanism

itrailer.As thefifthwheelplateofthe

the upperfifthwheelplateofthe semi-

inggearwheelscometorest ontheground

eightofthe semitrailer.


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ENANCEINSTRUCTIONS

INSTRUCTIONS.

cationmaintenanceforthisvehicle.

ctionsarebindingonall echelonsof

allbenodeviation.

edonfigure8are fornormaloperating

ntervalsunderextremeconditionssuchas

mperatures,prolongedperiodsofhighspeed,

dordust,immersionin water,orexposure

chmayquicklydestroythe protective

drequire servicinginordertopreventmal-

hemateriel.

edinthe"Key"in accordancewith

;above+32°F,+32°Fto0°F,andbelow

changegradesoflubricantsby maintain-

tionof thevehicleduringtheapproachto

inarilyitwillbenecessarytochangegrades

temperaturesareconsistentlyinthe next

ssmalfunctioningoccurssoonerdueto

tooheavy.

INSTRUCTIONS.

Operatelubricatinggunscarefully

oensurea properdistributionofthelubri-

alvesstickandpreventthe entranceof

itting,anddeterminethecause.Replace

ators.Iflubricatorcannotbereplaced

withtapeasatemporaryexpedienttopre-

easecups,oilers,andoilholes are

vehicle(figs.9,10, 11,and12).Wipe

thesurroundingsurfacebeforelubricant

provided,applynewlubricantuntil

om thevent.Exceptionsarespecifiedin

onOrder.


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ANDARDBODYCORP.MODELFit)

CATIONORDER

T

GROSS,2,WHEEL(2DT)

M

l

ft

Strew

arings

Plate

ins

Pits

Wear Plate

TEMPERATURE


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alsurfacesonwhichafilm oflubri-

ymanualapplication,beforethefilmis

HAFT

EARING

cationPoints

T,dry-cleaning,orOIL,fuel,Diesel,

Useofgasolineforthis purposeispro-

yallpartsthoroughlybeforeapplying

ividualParts.Thefollowingin-

ationandserviceofindividualunits and

12).


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ricationPoints

NNERWHEELBEARING

cationPoints

movethewheel,hub,anddrumas-

tocleanbearings,andrepackwith

,No.2.Tocleanandrepackwheelbear-

eremovedfromthe hub(par.25).Re-

ndwashwithSOLVENT,dry-cleaning,

sremovedfrombothinsideandoutside

bearingasideto dry.Washinsideofhub

T,dry-cleaning.Whenbearingsarethor-

hOIL,engine,seasonalgrade,packraces

pose,No.2,andreassembleinhub(par.

sfactorily,kneadthelubricantbyhand


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LATE

EARPLATE

ANKSHAFT

NKSHAFT

ricationPoints

ndinnerrace.Coattheinside ofhuband

atingoflubricanttopreventrust.The

gracesissufficienttoprovidelubrication

d.CAUTION:Excessivelubricationmay

edrum.

movethenuts,lockwashers,andbolts

lhubcapsandremovethe wheels.NOTE:

formedwhenthesemitraileris attachedto

ing wheelsareretracted.Cleanoldgrease

ubs,andcleanthelanding wheelaxle

gsurfacesofhubsandaxlespindleswith

,No.2.

FTHWHEELPLATE.Lubricatethe

eelplate(fig. 39)withGREASE,general

plylubricantbyhandapplicationtopoints


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rig'ht

andtoll lig'M,

cesthissighl/


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VEMAINTENANCESERVICE

performanceofmaterieltotheOrd-

formaintenance.

maybe maintainedintheDuty

mNo.6).

VEMAINTENANCE

ficiencyitisnecessarythatthese

yinspectedatintervalseachdaytheyare

efectsmaybediscoveredandcorrected

sdamageor failure.Certainscheduled

beperformedatthesedesignatedintervals.

s sectionarethoseperformedbythe

ration,during-operation,at-halt,after-op-

enanceservicesarelistedontheback

PreventiveMaintenanceServiceRecord,"

ervehiclesofalltypesandmodels.Items

esbutnotlistedon W.D.FormNo.48are

dingsundertheitemstowhichtheyare

dontheform thatdonotpertainto the

natedfromtheprocedureaswritteninto

ationmustthoroughlyschooleachdriver

anceproceduresetforthinmanuals,

ecificallyonW.D.Form 48,ornot.

D.FormNo.48that applytothese

hismanualtoprovide specificprocedures

einspectionsandservices.Theseservices

spectionandconservethetimeof the

arilyinthe samenumericalorderasshown

eitemnumbers,however,areidentical

ofeachitemappliesalso toanysup-

ction,andgenerallyincludesachecktosee

odcondition,correctlyassembled,secure,


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







dcondition"isusuallyan external

minewhethertheunitis damagedbeyond

Theterm"goodcondition"isexplained

otbentor twisted,notchafedorburned,

bareor frayed,notdentedorcollapsed,

toseethatit is"correctlyassembled"

linspectionto seewhetheritisin its

ninthevehicle.

todetermineifitis "secure"is

examination,awrench,hand-feel,orapry-

uchaninspectionshouldincludeany

cknuts,lockingwires,orcotterpinsused

beunderstoodtomeanworn,closeto

ts,andlikelytoresult inafailureif not

cheduledinspection.

ctoryoperatingcharacteristicsbeyond

elontocorrectmustbereportedatthe earliest

tedindividualinauthority.

ERVICE.

nscheduleisdesignedprimarilyasa

leshavenot beendamaged,tamperedwith,

er-operationServicewasperformed.Vari-

yhaverenderedthevehiclesunsafefor

tyofthedriverto determinewhetheror

nditiontocarryoutanymissionto which

erationwillnot beentirelyomitted,even

ons.

erationServiceconsistsofinspecting

ngtotheproceduredescribed,andcor-

ficiencies.Uponcompletionoftheservice,

promptlytothe designatedindividual

DDAMAGE.Examinetheexteriorof

dequipment,forinjurycausedby tampering,

debris,orshellfiresinceparking.

KANDAIRFILTERS.Examineair

es,andconnectionsforloosenessordam-

rtruck,listenforair leaks,drainwater

cock.Besuretruckto semitrailerair


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nnected;or,ifnotinuse,that theyareclosed

ndthatdummycouplingsareattached.

S)ANDREFLECTORS.Cleanalllight

ors,andinspectunitsforloosenessor dam-

cted,andtacticalsituationpermits,open

switchestoseeif lampsrespondproperly.

UBNUTS.Seethat allwheelandhub

utsarepresentandsecure.

allsemitrailertiresareproperly

imum),cool.Removeforeignobjects

s,orbetweenduals;inspectfordamage.

SUSPENSION.Examineradiusarms

ndU-boltsfor loosenessordamage.Look

shiftedleaves.

NECTIONS.Inspectalltowingdevices

,particularlypintledrawbar,retracting

mechanism.

AD.Inspectallbodyunits andmount-

age.Seethatdoors operatefreelyandlatch

ameboltsforsecurity.Ifloaded,cargo

edandsecured.

RATIONCHECK.TheDuring-operation

onsemitrailerstartimmediatelyafterthe

sfollows:

ERVICE.

cleisin motion,beonthealertfor

rattles,knocks,squeals,orhumsthat may

fthereisanyabnormalsag,side sway,or

okensuspensions,disconnectedtowingor

gbrakes.

erationServicesconsistofobserving

heproceduresfollowingeachitem,and

onsofserioustrouble.Noticeminorde-

orreportedatearliestopportunity,usually

tsemitrailerbrakesindependentlyof

surethey areeffectiveandoperatewithout

chatter,orsquealing.

R.Beonthe alertforanyunusual

eratingcharacteristicsofwheels,suspension

ngoperationof landinggear,observeany

dingofoperatingmechanism.


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vicesmayberegardedasminimum

andshouldbeperformedunderall tactical

moreextensivemaintenanceservicesmust

gether.

vicesconsistofinvestigatinganyde-

eration,inspectingitemslistedbelowac-

followingtheitems,andcorrectingany

enciesnotcorrectedshouldbereported

dindividualinauthority.

ES.Placehandcautiouslyoneach

to seeifitis abnormallyhot.

SUSPENSIONS.Inspectsprings,radius

sforloosenessor damage.

UBNUTS.Seethat allwheelandhub

utsarepresentandsecure.

all tiresforunderinflationand

slodgedintreads,carcasses,andfrombe-

NECTIONS.Inspectalltowingand

sforloosenessordamage.Besurealllock-

AD.Inspectallbodyunits andmount-

age.Seethatdoors operatefreelyand

argomustbeproperlydistributedand

alllight andreflectorglass,andin-

age.

DWEEKLYSERVICE.

onServiceisparticularlyimportant,

ver inspectshisvehicletodetectany

edeveloped,andcorrectsthoseheisper-

dreportpromptlyto thedesignatedin-

sultsof hisinspection.Ifthisscheduleis

evehicleshouldbereadytorollagain on

efore-operationService,withafewexcep-

ytoascertainwhetherthe vehicleisinthe

wasleft uponcompletionoftheAfter-

er-operationServiceshouldneverbe


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xtremetacticalsituations,butmaybe

mentalservicesoutlinedfortheAt-halt

ormingtheAfter-operationService,

andconsideranyirregularitiesnoticed

re-operation,During-operation,andAt-halt

tionServiceconsistsofinspectingand

ms.ThoseitemsoftheAfter-operation

yanasterisk( * )requireadditionalWeekly

orwhichareindicatedinsubparagraph(b)

S)ANDREFLECTORS.Cleanallunits,

nessanddamage.Iftacticalsituationper-

witchesto besuretheyoperateproperly,

ond.

WIRING.Examineallaccessiblewiring

efordamage,andseethatit isproperlyand

upported.

ndexcessivewear.Removeobjects

s,andfrombetweenduals.Checkforlow

ofvalvestems,andpresenceofvalvecaps.

70pounds(maximum),cold.

ywornorotherwiseunserviceable

bletireswhichshowabnormalwearshould

ositions.Apparentmechanicaldefects

bereportedforattentionby higherechelon.

USPENSIONS.Cleanoutallobjects

emorbetweenunitsand springs,andinspect

hiftedleaves,looseordamagedclips,

ckets.Seethatradiusarm adjustinglock

ylocked.

ANK.

ilerfor loosenessanddamage.See

ht,andthat airlinesareproperlysupported

rvehicleparts.Drainwaterfromtankand

toperateallbrakecontrolvalves,and

tank mountingsandallconnectionswhere

omall semitrailerairlinerubberhose.

frombothair lineniters.

ONNECTIONS.


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







nd pintlehookforloosenessanddam-

properlyandlockssecurely.Inspectfifth

be suretheyarein goodconditionand

erisconnectedtotractortruckbe sure

nectedandlocked,andthatbrakeand

ht.

ingdevicemountingandassembly

eelconnectingandlockingmechanism

minepintlehookspringanddrawbar for

EANDATTACHMENTS.Examineentire

arts.Be suredoorslatchsecurelyand

frameforbrokenwelds,loosenuts,orrivets;

embers,orbrackets.Besurealllandinggear

mountingandlockpinsandbolts,arepresent

yunsatisfactorylandinggearoperating

ngoperation.

mblyormountingnuts orscrewsindi-

thisinspection.

mountingandhubnuts,springclips,

ingconnections,floorskidstrips,orbolts,

assemblynutsor screws,thatinspection

ecessaryonaweeklyormileagebasis.

EEDED.

ereinspectionhasindicatedoilcanor

y.

ointslistedonthe vehicleLubrication

weeklyattention.

ICLE.

se,andrefusefrominterior andexterior

maroundlandinggearandbrakeoperating

rs.

lerwhenpossible.Ifnotpossible,

ctpaintorcamouflagepatternforrustor

ausereflections.Seethatall vehiclemark-

cticalreasons)arelegible.CAUTION:

ntowatertor washing,caremustbetaken

oesnotgetinto wheelbearings,orbrakes,

ring.


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NTIVEMAINTENANCE

EVENTIVEMAINTENANCE

scheduledmaintenanceinspections

vemaintenancefunctionoftheusingarms,

fcommandersofoperatingorganizations,

uencyofthepreventivemaintenance

consideredaminimumrequirementfor

es.Underunusualoperatingconditions

tures,dustyorsandyterrain,itmay be

ainmaintenanceservicesmorefrequently.

CIPATION.Thedriversshouldaccom-

sistthemechanicswhileperiodicsecond

enanceservicesareperformed.Ordinarily

hevehiclefor ascheduledpreventivemain-

nablycleancondition;thatis,it shouldbe

dor greasetosuchanextentthat inspec-

riously hampered.However,thevehicle

ped thoroughlyclean,sincecertaintypes

leaks,andlooseorshiftedparts orassem-

hesurfacesareslightlysoiledor dusty.

uctionsotherthanthosecontainedin

step(4) orthespecificproceduresinstep

edforthe correctperformanceofa

serviceorforcorrectionofadeficiency,

alor adesignatedindividualinauthority,

S.Thesegeneralproceduresarebasic

efollowedwhenperformingtheservices

pecificprocedures.NOTE:Thesecond

ethoroughlytrainedintheseproceduresso

utomatically.

edsubassembliesareinstalledto cor-

ouldbetakentoseethatthey areclean,

operlylubricatedandadjusted.

ricantretainerseals,a coatingofthe

overthesealingsurfaceof thelipofthe

aleatherseal,itshould besoakedin

practicable),foratleast30minutes.

beworkedcarefullybyhandbefore

mustnotbescratchedormarred.


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ofeachitemappliesto anysupporting

ndusuallyincludesachecktoseewhether

on,correctlyassembled,secure,orexces-

csmustbethoroughlytrainedinthefol-

seterms:

condition"isusuallyan externalvisual

hethertheunitisdamagedbeyondsafeor

m"goodcondition"isexplainedfurtherby

wisted,not chafedorburned,notbroken

yed,notdentedor collapsed,nottornor

toseethatit is"correctlyassembled"

linspectionto seewhetheritisin itsnor-

thevehicle.

todetermineifitis "secure"isusually

ation,awrench,hand-feel,orapry-bar

aninspectionshouldincludeanybrackets,

ckingwires,orcotterpinsusedin assembly.

beunderstoodtomeanworn,closeto

ts,andlikelytoresult inafailureif not

cheduledinspection.

eareindicatedbyrepeatingtheitem

hichshowtheintervalat whichtheservices

howthat thepartsorassembliesareto

yservices.Forexample,anitemnumber

positeaTIGHTENproceduremeansthatthe

ectmustbe performed.Thespecial

aryadjustmentsinaccordancewith

smanual,specialbulletins,or othercurrent

vehiclewithdry-cleaningsolventto

dirt,andotherforeignmaterial.Afterthe

emin cleansolventanddrythemthor-

thepartscleanuntil reassembled,andbe

ngsolventawayfromrubberorotherma-

Cleantheprotectivegreasecoatingfrom

alis notusuallyagoodlubricant.

appliesbothtolubricationoperations

vehicleLubricationOrderandtoitemsthat

but shouldbeperformedinconnectionwith

ons,ifpartshavetobedisassembledforin-


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




NTIVEMAINTENANCE

stsofperformingspecialoperations,

gunits withoil,andchangingorcleaning

s.

perationsshouldbeperformedwith

(forceonthewrenchhandle)totightenthe

chanicalpractice.Usetorque-indicating

Donotovertighten,asthismaystripthreads

ningwillalwaysbeunderstoodtoinclude

ockwashers,locknuts,andcotterpins

tening.

itdifficulttoperformthe complete

proceduresatonetime,theycan sometimes

nningtocompleteall operationswithinthe

bletimeathalts andinbivouacareasmust

assurethat maintenanceoperationsare

ythetacticalsituation,itemswithspecial

ouldbegivenfirst consideration.

eventivemaintenanceproceduresthat

oseoutlinedonW.D.,A.G.O.FormNo.461,

intenanceServiceWorkSheetforWheeled

ertainitemsontheworksheetthatdo

renotincludedintheproceduresin this

mericalsequenceofitemsonthe work

anualprocedures,butinsomeinstances

ervationofthemechanic'stimeandeffort.

ES.Theproceduresforperformingeach

thly)and6000-mile(six-month)main-

chevershalloccurfirst,aredescribedin the

eofthecharthastwo columnsatitsleft

6000-mileandthe1000-milemaintenance

willbefoundthat aparticularprocedure

heduledmaintenances.Inorderto determine

,lookdownthecolumncorrespondingto

whereveranitemnumberappears,perform

ppositethenumber.

tuationdoesnotper-

mthoseitemswhichre-

ntofthevehicle.When

houldbefor preferably4

on.Performthisinspec-

aph10.


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





NDARDBODYCORP.MODELF16)

gency(BrakingEffect,

irControl).Test

telybyuseofhandcontrol

ctor,truck,andobserve

nyerraticaction,side

dicateunevenbrakeshoe

oreddrums.Stop semi-

ergencylineandobserve

dvehicle.

ents,BodyorWheels).

dtestforanynoise that

agedattachmentsmounted

cularlyforindications

Haveassistantlistenfor

s,suspensionunitsor con-

tedamageorinadequate

estsemitrailerair

essure atgovernedmaxi-

edandenginestopped,

ceabledropinpressure

essuredrop occurs

emforleaksby soapsuds

onsemitrailerairtank

ms,Hubs).Atcom-

umsand hubsforab-

es.

NS

lvestems areincor-

ged,andthatallcapsare

ngertight).Examineall

ks,blisters,andirregular

recarrier,allrims, lock

conditionandsecurity.

elinneroutermounting

amagednuts.


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




NTIVEMAINTENANCE

esproperlyinflatedto

ver-allcircumferencesof

als.Thedifferencein

ustnotexceedthe3/4-inch

ON:Donotreinstall

gservicesarecomplete.

ntenance,theseveral

emsupto andincluding

hichtherewillbeoverlap.

bestorderfor economy

ort,andfororderlyre-

s;inspectandservice

ndirtandgrease from

der supportanddust

y-cleaningsolventaway

nspectdrumsforscored

andforsecuremounting

wheelstuds.

ecamsandsurfacesof

tsameforexcessivewear.

ratefreelyintheirbush-

excessivewear.Tighten

andhubto drumnuts

sbeenoperatedindeep

removerightwheeland

ordamage.Ifthis lining

eotherwheelandservice

r,beingsuretoclean,

movedwheelbearingsas

esbyminormethod,if

ddrumsremoved,in-

yareingoodcondition,

oes,ingood wearingcon--

orlubricant,andnot

eifshoesarein goodcondi-

nchors,guides,andre-


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






pringshavesufficient

perlyto releasedposition.

wornpoint shouldbe

milesofservicebeforebolt

drums.

reasefromlinings with

ressedair.

trelateditemsto52in-

ustshoesbyminormethod.

talled,adjust bymajor

slackadjustersso dia-

tminimum,approxi-

raph29.

goodcondition,correct

ecertainthatmainspring

edorloose.Test forworn

esureadjustingnutsare

eelsforcracks,bent

Checkforwheelrun-out

pinwheelsandtestbear-

essandindicationsofdry

beenoperatedindeep

ditions,removerightrear

ubricantforcontamina-

ovebearingsfromall

emanneras6000-mile

elbearingsandseals.

ckforserviceablecondi-

ooseorwornparts.Before

sandseals;ifwornor

atebearingsandcoatthe

t.Packthecavitiesbe-

entsideof innerwheel

UTION:Donotpack

etweenwheelbearings

eunit,adjustwheelbear-


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




NTIVEMAINTENANCE

ookforloosemount-

eckfordamage,orindica-

gsonbottomofbrake

drain cockintankto

nplugsand closedrain

entsinairfilters.Use

s,Seals,SlackAd-

emstoseeif theyarein

assembled,andsecure;that

yadjustedaccordingto

ambersandairhose

sofleaks.Tightenall

utsorscrewssecurely.

Bolts,Hangers,and

rei ngoodcondition,

secure.Springclipsand

pringleavesshouldnotbe

position.This maybean

terbolt.Seeif deflection

ndapproximatelythe

oltsforexcessivewearby

gU-boltssecurelyand

smembers).Inspect

ts,siderails,andcross-

ingoodcondition,secure,

frameappearsto beout

mets.Observethese

ilertoseeifthey arein

upported,connected,and

ose).Examineall

rakehoseundersemi-

goodcondition,securely


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






dsothatlinesorhose will

hicleparts.

kerelayvalve,clean

d,andreinstallsecurely.

,lubricateinaccord-

er,paragraph8,andcur-

,usingonlycleanlubricant

vehadspeciallubrication

ervice.Replacedamaged

alllightunitsor sockets,

condition,clean,and

permits,testallswitches

properly.

eyareallpresent,in

dsecure.

andFloor).Seethat

dsecure.Checkreardoors

hingesandlatchesforgood

ng,andproperoperation.

.

etoseeif itisin good

ountedtoframe.Test

eyoperateproperly,are

diflockpinispresentand

n.Payparticularattention

rawbar.

nepaintofentire

shinyspots, oiland

barespots.Makesure

onsarelegible.

ailerfifthwheelplate

areingoodcondition,

cessivelyworn.Test

chanismtobesurethey

emitrailerairlinecon-

theyareingoodcon-

rn,andwillcouplesecurely


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




NTIVEMAINTENANCE

afetyvalveonemergency

llatchsecurely.If semi-

suredummycouplings

d.Ifrubbersealsare hard

brakefluid torubber

eels,Supports,Lock

ctalltheaccessible

oodcondition,correctly

cated,andnotexcessively

esttosee thatcrank,

ctionsatisfactorily.Spin

ee.Lookparticularlyfor

ypinsorbolts.

bricatelandinggear

Order,paragraph8.

mblyandmounting

towageList,toseethat

hattheyareingood con-

andsecurelymountedor

hockblocksshouldbe

ed,oneoneachsideof

eandwiretarpaulin

intool box.

oseethat decontam-

on,securelymounted,

zzlesfreeandclean.

Refill isrequiredevery

clemanuals,Lubrication

ormNo.478are present

mpleted).Inspectsemi-

ficationworkordershave

eranyMWO'sormajor

ntsmadeattimeofthis

ormNo.478.


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






alroad test,recheck-

3.Confineroadtestto

cessarytomakeproper

ectorreporttodesig-

nciesfoundduringfinal

oncontainstroubleshootinginfor-

nbemadeto helpdeterminethecauseof

ay developinsemitrailersusedunder

ns(above32° F).Eachsymptomoftrouble

unitor assemblyisfollowedbyalist of

Thetestsnecessarytodeterminewhich

s responsibleforthetroubleareexplained

ns.Themaintenanceinstructions

ndicatedis presentafterthesemitrailer

edtodefinitelylocatethesourceoftrouble.

temonthe semitrailerisdependent

of thetractortruckforits airsupplyand

theairbrakesystemofthe tractortruck

wise,itwill beimpossibletoobtainproper

semitrailer.

.Beforeattemptingtolocatethe

e,checktoseethat thesemitraileris

actortruckwhoseairbrakesystemfunc-

NGORLUBRICATING.Adjustorlubri-

).


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




AIRBRAKESYSTEM(BELOW80LB).

ureintractortruckair brakesystem(par.

ERGENCYVALVE.Repairorreplace

ar.33).

y.

NGORLUBRICATING.Checkbrakes

ckforcorrectadjustment.Lubricateor

and29).

RACTORTRUCKAIRBRAKESYSTEM.

ureintractortruckair brakesystem(par.

REFROMTRACTORTRUCKBELOW

vepressurefromtractortruck.Adjust

2),orreplacebrakevalve.

GORHOSELINE.Repairorreplace

Cleanairfilter(par.36).

WITHBRAKESAPPLIED.Refertopara-

wly.

NGORLUBRICATING.Adjustorlubri-

ars.29and 8).

CHECKVALVEINEXHAUSTPORTOF

E.Replace(par.33).

LAYEMERGENCYVALVEPLUGGED

plug(par.33).

ONHOSELINE.Replacedamaged

Cleanairfilter(par.36).

OPERLYCLOSED.Opencut-outcocks

ROPERLYCONNECTEDTOAIRHOSEOF

tairlines(par.38).

AKESYSTEM.Chargebrakesystem

ure.


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






NGINHOSELINE.Repairorreplace

TER.Cleanfilter(par.36).

PERLYCONNECTEDTOBRAKESYSTEM

ectlinescorrectly(par.38).

CTORTRUCKINAPPLIEDPOSITION.

ortruckto"RELEASE"position.

NG.Lubricateoradjustbrakerigging

ALVEINEMERGENCYPOSITION.In-

ortruckbrakesystem,or openreservoir

pars.32and 37).

TIALLYCLOSED.Opencut-outcockson

GORHOSELINE.Repairorreplace

ING.Relinebrakes(pars.29and30).

NG.Lubricatebrakerigging(par.8).

LVEONTRACTORTRUCK.Repairor

alve.Refertotractortruckmaintenance

ERGENCYVALVE.Replacedefective

NG,LUBRICATING,ORRELINING.Ad-

kesasrequired (pars.29,8,and30).

ING.Relinebrakes(pars.29and30;

ESPRINGORBRAKECHAMBERRELEASE

ebrokenspring(par.30).

-ROUND.Replacedamagedbrake

BERDIAPHRAGM.Replacedefective

m(par.34).


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




BrakesReleased.

ALVELEAKING.Replacedefective

ar.33).

CONNECTIONS.Repairorreplace

ections(par.39).

hBrakesFullyApplied.

GENCYVALVE.Replacedefectiverelay

).

BERDIAPHRAGM.Replacedamaged

NNECTIONS.Replacedamagedlinesor

hBrakesAppliedandRelayEmer-

yPosition.Replacedefectiverelay

).

ALVEGROANSORCHATTERSWHEN

laydiaphragmguideringimproperlyin-

ergencyvalve(par.33).

VEINRELAYEMERGENCYVALVE

SAREAPPLIED.Defectivediaphragmin

allnewdiaphragminexhaustcheckvalve

PresentinAir BrakeSystem.

AINEDATPROPERINTERVALS.Drainall

chweek,dailyifnecessary.Cleansystemif

ping.

earrangeloadevenlytodistribute

RING.Ifthespring willnotreturnto

oaded,replace(par.41).

ROKENLEAVES.Replacebrokenspring

LOSTREBOUNDCUPS.Replacelostor


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






DEWISE,OR"FANNEDOUT."Caused

lips.Replaceclips(par. 41).

OFSPRINGLEAVESDUETOBROKEN

okencenterbolt(par.41).

.Replacebrokenspringseat(par.41).

acebrokenU-bolt(par.41).

READS.ReplacedamagedU-bolt(par.

TTHREADS.Replacedamagednut.

DPILLOWBLOCK.Replacepillowblock.

.

EFROMSTRIKINGOBSTRUCTION,OR

xle(par.45).

WITHOBSTRUCTION,OROVERLOADING.

Replacebrokenradiusarm(par.42).

ECCENTRICBOLT.Replacebroken

UBBERBUSHING.Replacewornrubber

DJUSTMENT(fig.33).Adjustradius

xle(par.42a).

DRUMS,

obraketroubleshooting(par.16).

NDRUMS.Refertobraketrouble

-ROUND.Replacedamagedbrakedrum,


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




YALINED(fig.34).Alinewheels(par.

TINWHEEL,BETWEENDUALS,ORIN

truction.

AINSTBRAKEDRUM.Straightenor

9b).

TPROPERLYADJUSTED.Adjustwheel

UTS.Tightenwheelstudnuts.

SPRING.Replacebrokenbrakeshoe

AllTires.

ATION.Inflatetiresto properpressure.

oadweightshauled,andkeepwithin

4).

EMENTWITHKINGPIN.Adjustradius

inement(par.45).

HEELS.Tightenwheelstudnutsand

eplaceaxle(par.45).

MBER(fig.36).Replaceaxle(par45).

EVERE.Checkandadjustbrakes(par.

WHEELS.Replacedamagedwheelor

r OuterOnly).

YMATCHED.Matchduals.

E(fig.37).Replaceaxle(par.45).

INGLUBRICANT.Lubricatewheel

CONES,ORCUPS.Replacedamaged

par.26).

cedamagedhub(par.25).

ROPERLYADJUSTED.Adjustwheel

OES.Adjustbrakeshoes(par.30).

K.Relinebrakes(par.30).


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






SPRING.Replacebrokenbrakeshoe

ARINGADJUSTMENT.Adjustwheel

eplaceaxle(pars.44and45).

WheelorInsideBrakeDrum.

Cleanandlubricateaccordingto

UBDUETO INCORRECTLUBRICA-

accordingtoparagraph8.

HUBCAP.Tightenloosehubcap.

p.

TINCAMSHAFTNEEDLEBEARINGS

hub,anddrumassemblyasaunit and

and8). Ifbrakeliningblocksare

cks(par.30andfig.23).

frameis theresultofan accident

oadedsemitrailer.Heatsprungframe

ystandardpracticetostraighten.The

kand aheavyhammerareusuallysuffi-

.Thisdamagemayberepairedby

mage,andusingthetractortruckjack

ntoreshape(par.47).

UNTINGBOLTS.Replacedamaged

ar.47).

TINGPLATES.Removebumpermount-

mperdiagonalbracebolts,andremove

ermountingplates,andreplacebumper

PERBRACES.Removediagonalbumper

perandsemitrailerframe.Diagonal

d.Heatbumperbraceandstraighten.

les inflangesmatchcorrespondingholes

mitrailer(par. 47).

erAssembly.Removetirecar-

offour hookbolts.Repairorreplace

0).


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




elsareDown.

KBRACES(fig.45).Repairorre-

ar.55),

DLANDINGGEARLEG(fig.45).Replace

eLoweredtoCorrectPosition.

SORBRACES.Replacebrokenor

EYSINGEARS(fig.46).Replace

6).

DLANDINGGEARSCREW(fig.46).Re-

andinggearscrew(par.56).

otMoveWhenOperatingCrank

YS,PINS,ORBOLTS.Replacelostor

S(fig.46).Replacedamagedmiter

SORPINSDISCONNECTED.Replace

ired (par.56).

LandingGearPartiallyandThen

AGEDSCREWHOUSING(fig.45).

ar.56).

OKEN.Replacewornorbrokengears

46).Replacewornbushings(par.56).

Handle.

AGEDHOUSING.Replacedamaged

CKED.Removegears.Reassemble

eplaceifdamaged(par.56).

SHAFT.Replacedamagedpart

ely.

N.Lubricateproperly(par.8).

GORSHAFT.Replacedamagedpart


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






erly(par. 47).

Securehingebolts.

EN.Replacehinge.

moveandrepairdoor.

rate(par.47).

nkeyway.

AMAGED.Repairorreplacedamaged

EN.Replacedamagedrods.

aneling.Removeadjacentwood

nt,ordamagedpanel.Straightenor repair

placewoodbodylining(par.47).

(fig.41).

SWITCHONTRACTORTRUCK.Check

hforlooseorbrokenconnections.Tighten

cebrokenconnections.

BLEONTRACTORTRUCK.Checktrac-

nections.Checkcableplug.Replace

ESSCONNECTIONSONJUNCTIONBLOCK.

sonjunctionblock(par.49).

RNESS.Repairdamagedwiring

amaged(par.49).

MINALS.Cleanconnectionsandtighten

TANDTAILLIGHTGROUND.Cleanand

n(par.49).

RMINALS.Tightenorrepairterminals.

2).

EFECTIVE(fig.43).Checkforloose

rnordamagedswitch(par.51).

ig.44).Checkforlooseor broken

tchifwornordamaged(par.52).


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




GS,ANDTIRES

TA(figs.13and14).

ofthe pressed-steel,ventilatedtype,

-inchrims.Eachwheelis fastenedtoits

uts.Allthestud nutsonthewheels

ideofthe semitrailerhaveright-hand

he left-handsidehaveleft-handthreads.

dividuallyheldbytheinnerset ofcap

over theinnercapnuts,andis in-

uternuts.Eachset ofdualwheelsis

10studs uponwhichthewheelcap

emovingstudnutsfromwheelstuds it

aremarked"R"or"L"to makepossible

oftheright-handorleft-handsidetowhich

he dualwheelassemblyuponits

rumis attachedtoitsinnerface.The

he hubbyindependentthreadsand

ewheelstuds.Removalofeachinner

tud fromthehubanddrumassembly.

ndhubassemblyismountedonthe

edtaperedrollerbearing assemblies.The

ntothe innerandouterboreof thehub.

on,andare supportedby,theaxlespindle.

gbearingcups,is adjustedtoturn

aringcones.Thehubis adjusted,and

nuponthe bearings,bymeansofthe

instheD-washeragainstthe outer


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





ANDARDBODYCORP.MODELF161

esemitrailerrequire noservice,

ision.Inthe eventofwheeldamage,

.

d drumassembliesareremoved

e followingprocedure:

with thetractortruckunitofthe

eassemblyuntilthe dualwheelsarefree

nd.Blocktheaxleinthis position.

apnuts,andremovetheouter dual

uts,and removetheinnerwheel.

rewsretaininghubcap,and remove

espindle,andremovetheaxle

rclockwisedirection(B,fig.15).

(C,fig.15)fromthe axlespindleby

rewdriverbetweenthewasherandthe

ppingwithahammer.Forceopposite

ccession,topreventwedging.

ssembly,andpulloutwarduntil

Removetheouterbearing.CAUTION:

fullyreleasedsothatbrakeshoesdo

assemblycontainingtheinnerbear-

omthehubbyremovingthe nuts

Liftdrumfromthehub andstudas-

kingsurfaceisroughor damagedmust

onotrepairadrumwhosebraking

mageseldomoccurstohubsunder

s.Damagewillresult,however,ifbearing

edfromthehubbore.CAUTION:Follow

ragraph26toavoidsuchdamage.Dam-

nutsholdingwheelstudstothe huband

oose,resultinginwearofhubstud holes


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




GS,ANDTIRES

ASHER

PNUT(RIGHTORLEFT)

UT(RIGHTORLEFT)

TORLEFT)

UT

UTLOCKWASHER

ndDrum-Assembly,SectionalView


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






DRUM

OCKWASHERRAPD335742

AssemblyPartiallyDisassembled


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




GS,ANDTIRES

E.Themostcommonhubdamageis

lision.Thehub maybecomesplitor

ediatereplacementisnecessary.

ewornorbrokenwheelstuds.Care

linganew stud,tofittheshoulder ofthe

bbeforeit isdrivenintoplace.Install a

portingend ofthestud,toprotectthe

studinto hub.Useahardwoodbuffer

mmer.

umassembly(par.25 b).

rbearingcones.

ehubuponawoodblockwith the

DAXLESPINDLE

G

rtiallyDisassembledand

Assembly


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





GROSS.2-WHEEL(2dt).VAN


facingdown.Usedrift andhammerto

mthehub bore.Movetheendofthe

f thecupasit isdriven,sothatthe op-

cessively.(Becertaintodrivethe cup

entwedging.)Itmustbedrivenso that

theboreofthehub. Carelessuseof

tothemachinedboreofthehub.The

edforremovingbothcups.

cupsbyfacingupwardtheendof

pistobe inserted.Beforereplacingcups

ar.8).Placethe hubonawoodblock,

up squarewiththeboreofthe hub.Face

rtowardthehub.Placea hardwood

anddriveinto thehubboreuntil flush

ION:Usecaretodrivethe bearingcup

at itdoesnotbecomewedgedorsprung.

elyintothehubuntil thenewbearingcup

ofthehubbore.CAUTION:Unlessthe

ted,thehub cannotbekeptinadjust-

ompletelubricationofbearingsandhub

semblyupontheaxlespindle.

Assemblies(fig.15).

oneinthe innerbearingcupof

ring(G) withitsflangedsidetoward

placethefeltwasher(F) nexttothe

eld(H)isproperlyin placeonthe

oplacebymeansof themetaldowelpin

hespindle andaholein thedustshield.

ateontheendof theaxlespindle,

semblyontothespindle.Placetheouter

uterhubbore,andinstallthe D-washer

ptightagainstthe D-washer,then

dturn..Beforeadjustingthehuband

eaxlespindle,replacethedualwheel and

dofa shortbaruponthefloor beneath

arasapry againstthetires,holda finger

outerportionofthe bearingcageandthe


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





GS,ANDTIRES

excessiveplaybetweenthebearingand

spindle nutasrequiredtocompletethe

Assembly.Usingthejackpro-

k,placeundertheaxle againstthelower

he axleuntilthewheelstobe removed

edual wheelsontheoppositesideof

echockblockagainstthedualtires,and

opeinthe ground.Placeanemergency

alsoppositethechockblock.Usethe

enchtoremovetheouterwheelstud nuts,

el.Ifthe innerwheelandtireassemblyis

einnerstudnuts, andlifttheinner wheel

tuds.

el.Removethecorefromthe

hetireassemblybyunscrewingthecore

eLockRing


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







evalvecap.Removalofthevalvecore

onofthetube. Placewheelandtire

ewiththe wheellockringup.Whenthe

etooltoloosenand removetirelock

ckringhasbeenremoved,lifttheside

d removetirefromthewheel(fig.17).

ovetireflapandtubeforinspectionor

mustberepairedin accordance

almethods.Puncturesandtearsinthe

ordorfabric,mustbe vulcanized.Holes

epairedbycoldpatching.CAUTION:

ginnertubesmustnot beattempted.

eFromWheel

sinTires.When tubesandflaps

re mustbetakentopreventtubefrom

enwheelrimandthe beadofthetire.

mustbereplacedandthevalvestem

eelrim beforetubeisinflated.CAU-

empointsoutwardwhentube isreplaced

seethatitis firmlyseatedinthegroove


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





tymeasure,alengthofchainshould be

etireattwo oppositepointsonthewheel

precautionwill preventlockringfrom

jury,if ithasnotbeen securelyfastened

etire toproperpressure(70Ib) and

heelUnitsonHub Assembly.Re-

e hub,andapplytheinnercap nuts.

totightenall capnutsevenlyand

wheelismounted.Wheninstallationof

ompleted,theouterwheelshould bepo-

ftheinnerwheelandthe outercapnuts

beveledsurfaceonthe innerfaceof

edinto thebevelinthe wheelstud

pof thewheelassemblyonthehub

causetheweightofthesemitraileris

urfacesofthecapnuts. Unlessthebev-

tsare firmlyseatedintothecorresponding

stud holes,thewheelswillbecomeloose

studs,or hubwillresult.

TA.

ebrakesofthesemitrailerare

ycompressedairsuppliedbythetractor

ines (fig.18)coupledtothefront of

irlinesare connected,andthestopcocks

ortruckareopened,the brakesofthe

erareactivatedandcontrolledasa single

smofthesemitrailerisof theinternal

peoperatingoneachofthedualwheel

Thepurposeofthebrakesisto

mentsmoothlyandevenly.Thisbraking

yforcingthebrakeshoes,linedwithheavy

h-frictionmaterialagainstsurfacesofthe

oesarein turnactuatedbythecamshaft

tsareoperatedbytheairbrakesystem

kadjustersattachedtothe innerendsof

djusterarmsareattachedtothepush

sbyyokesand clevispins.Thebrake

ybrackets,tothecentralsectionoftheaxle

s.Eachbrakechamberisboltedtothe


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





GROSS,2-WHEELI2dt),VAN



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





AFT

ET

yandBrakingMechanism

ourbolts,clampingbothbrakechamber

otheaxle(fig.19). Thebrakechambers

stem,actingdirectlyontheslackadjuster

inateinS-headsbetweenthebrakeshoe

hebrakingforcethroughthebrakeshoes

wheel,hub,anddrumassemblies.Effec-

mplishedonlywheneachunitofthe

isingoodmechanicalconditionandprop-

itsdependentunits.NOTE:Theair

aileris dependentupontheairbrake

forits airsupplyandcontrol.Theair

rtruckmustbe ingoodcondition;other-

toobtaingoodbrakeperformanceonthe

.

n.

S.

ion.

etractortruckjacktoraisetheaxle

sitionboth dualwheelsremainoffthe

kes.Removethetwodustshields

apscrewsto thebrakeadapterplateof

erationexposesthebrakeliningsfor


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







ebrakeshoeliningsforunevenor

aseonthelinings,or ontheinnerbraking

s.Rotateeachdualwheelassemblyto

oelinings againsttherotatingdrums,

theinnerbrakeshoeassembly.Ifbrake

wisein goodcondition,onlyminoradjust-

servicethebrakes.

onlyadjustmentrequiredtocom-

performedbyrotatingthe slackadjuster

se(fig.29)untilthebrakeshoelinings

edrums.Thenbackoffwitha counter-

ebrakesarefree.Replacedustshields

ndertheaxle.

HUBASSEMBLY.Ifinspectionhas

nings,noiseor freeplayinthebrake

wearofthebrake liningblocks,removethe

UT

keDrums


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





E

EBRAKELININGBLOCK

keLining

par.25)to makenecessarymajoradjust-

nstallationofnewbrakeshoelin-

ecessitatesreadjustmentofthebrake

othnutsonbothanchorpins(fig. 21)so

movedfreely.Removedustshieldsfrom

ewheelanddrumassembly.Iftheas-

sitionfreely,backofftheslackadjusters

tionofthewormscrew(fig.29)untilbrake

m. Centralizetheanchorpineccentrics

terwormscrewuntil theshoesaretight

brakeeccentricanchorpintoright

eristightened,untilthebrakesare cen-

feelergagetoset brake-shoeclearance.

endat0.010inch.Setclearanceatcam

ocknuts onanchorpins,whileholding

ESHOELININGS.Newbrakelinings

edafter1hour,or 25to40miles ofopera-

brakeshave receivednormaluse.Watch


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





GROSS.2-WHEEL(2di),VAN


LDRAPD335749

es


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




ringthefirst 500to1,000milesafter

Ifthetravel oftheslackadjustersin-

tbeadjustedtokeepthe brakingarmat

Afterproperadjustment,withthebrakes

armandthe brakechamberpushrod

lyless than90degrees;andbothslack

sameangle.

LY.

Removewheel,hub,anddrumas-

thethreeboltsholdingthe anchorpin

tingplate(fig.23).Tap theanchorpin

pinsand pullbothshoesfreeof theas-

eshoereturnspringbyremovingthespring

ngto eachshoe.

GS.Whenbrakeblocksneedtobe

thebrakeshoe assemblymustbere-

chandscrewdrivertoremovethefour

akeblocktothe shoe(fig.23).Remove

eachsectiontothe shoe.Carefullyclean

greaseanddirt,beforeinstalling newblocks.

hings.Eachbrakeshoehastwo

orpin end.Toreplacewornbushings,

s.Pressordrivenewbushingsintoplace.

hardwoodblockmustbeusedasa buffer

mertopreventburringordistorting the

ushingwillretardthe freemovementof

ationandreleaseof thebrakes.Bushings

mensions,andpropercareininstallation

tofthebrakeshoe upontheanchorpin.

lersandRollerShafts.Thebrake

eunanchoredendofthebrakeshoe.The

onashaft(fig.19). Theshaftisretained

gby threeheavyprickpunchmarkson

maybe drivenoutandnewrollersor

movingthebrakeshoeassembly.When

asbeenreplaced,theshaftmustbere-

kpunchmarks.

hebrakeshoeassemblyisreplaced

fremoval.Reassemblethebrakeshoe

eplacethebrakeshoesin positionupon

replacetheanchorpins.Position the

keshoeassemblyuponthebrakemount-

eboltsholdingthe anchorpinbracket

e(fig.23).


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






BOLT

keShoes


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




SEMBLY.

TONS.Jackupaxleuntildualwheel

actwiththeground(par. 27).Remove

ly(par.25).

NGSEAT^LUBEFITTING

SHER

emblyDisassembled

emovethenutandlockwasherfrom

e camshaft(A,fig.25).Removethe

omtheslackadjusterarm.Tap slack

,usingwoodbufferblockbetweenthe

eriftheslackadjusterassemblydoesnot

islocatedonthecamarmjust outside

B,fig.25).Removesnapring fromthe

worktowardthesplined endofarm.Itis

feltretainerand feltwasher.Thesetwo

eneedle bearingasthecamshaftisdrawn

gsinthe brakebackingplate.Thebrake

thecamshaftasitis withdrawn,unless

rtwitha blockofsuitablelength.CAU-

nremovingthecamshaftsothatthe

kemountingplateare notdamaged.Keep

mal workingpositionasitis withdrawn.

gs.

TONS.Whenitisnecessarytoremove

hecamshaftmustfirstbe removed(subpar.


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





NGROSS,2-WHEEL(2dt).VAN


R

IONFlTING

INGSCREW

NTINGFELTWASHERFELTRETAINERSNAPRING

TE]

RINGSEATNEEDLEBEARING

mshaft


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





GS.Thecamneedlebearings(fig.24)

astindefinitely.However,iftheyare

nt(inremovingthecamshaft),orother

rearetwobearingsineachmounting

romthe boreofthemountingplate

oodpinof suitablediameterisusually

fromthemountingplate.

RINGS.Startthenewbearingsinto

brakebackingplate.Tapeachgently

aringinstraight.Whenthebearingshave

eyshouldbe pressedintooperatingposition.

overtheendsofthe bearings,andusea

tion.Whenfullyin position,eachbearing

eredgeofthebrakebackingplate.

AUTION:Itmustbenotedthat

dleft.Whenreplacingthem,caremust

handcamon therightside,andthe

de.Eachcamis stampedonitsinner

ennumberis rightside,oddnumberis

thecamshaftispassedthroughthe

kemountingplateand pushedtowithin

acketcontainingtheballbearing.Place

ned endofthecamshaft,andpush

gplate.Slide thefeltretainerinplace

ndslipthesnapring overthecamshaft

shthe splinedendofthecamshaft

thecambracketuntiltheS-headofthe

rakemountingplate.Seatthefeltwasher

nstthe brakemountingplate,andslip

ninggrooveinthecamarm.I nstallthe

omCamBracket.Removethe

mshaft(subpar.aabove).Taptheouter

sidethe bearingbore.Thisoperation

ngto workoutofthebracket.Ifthis

omthebracket,removethealemite

sertasmall screwdriverinthealemite

rdagainstthe bearing.Continuetapping

withasmallhammerwhileprying

escrewdriver.Thesecombinedoper-


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







ng,causingit toslidefromthebore of

.

nCamBracket.Placethenewball

dof thecamshaft.Carefullystartthe

slackadjusterbracket.Oncethebearing

eslippedintoplace.Ifthe alemitefitting

emovaloftheoldbearing,replace.Re-

eplacetheslackadjusternutandlock

amberpushrodontheslackadjusterarm.

eairbrakesystemofthe semi-

rof individualcomponentsconnectedby

dividualunits tofunctiontogetheras

ism.Fundamentally,thesemitrailerair

cesnecessarytodirectandcontrolthe

dtotransformtheenergy ofcompressed

nicalforceandmotionnecessarytoapply

rtotesttheair brakesystemofthe

ty,connectitsairbrakesystemtothe

tortruck (par.6).Chargethecombined

ssureof100pounds,asregisteredby the

of thetractortruck.

BRAKESRELEASED.Stoptheengine

easethe brakes.Observetherateof

steredbythedashgage onthetractor

ropin pressureshouldnotexceed3

BRAKESAPPLIED.Withthetractor

brakesfullyapplied,observetherate

steredonthedashgageof thetractor

pressureshouldnotexceed4pounds

KELEAKAGE.Ineachofthe leakage

air pressurewasduetothecombined

mofboththetractortruckand thesemi-

iththecut-outcocksin theairhoselines


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





cktothesemitrailerclosed.Anylossin

estsisdue toairleaksin theairsystem

EAKAGE.Todeterminetheair pres-

ystemofthesemitrailer,it isonly

airpressurelossesof thetractortrucktests

essurelossesofthecombinedtractortruck

observed.Thisdifferenceineachtest

rbrakesystemlossin airpressure.

Ifleakageineitheroftheabovetests

mponentsoftheairbrakesystemofthe

drepairorreplacethe leakingconnection.

Withtractortruckandsemitrailer

ing,applythebrakesandchecktheir

ofthebrakesshouldstop themotionof

erquicklyandsmoothly.Thebraking

ndpositivebothduring applicationand

etractortruckandsemitrailer

y.Checkpossibletiremarksmadebythe

onote anyindicationofunequalbraking.

akingis noted,asindicatedbyheavy

andnot fromtheother(par.19),the

ldbe jackedupandblockedwithboth

und.Checkeachbrakeshoeli ning

nyadjustmentsinspectionindicatesas

brakingtestsafteranyadjustmentshave

brakesapplyandreleaseevenly.

ALVE(fig.26).

in pressureintheairbrake system

tedbytests,must belocatedandstopped.

sin theairbrakesystemis accomplished

unitscomposingthesystemuntilall

have beencorrected.

ergencyvalverelaysthebraking

cktothe semitrailer,andprovidesan

ononthesemitrailerintheeventit acci-

mthetractortruck.


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







Withtheair brakesystemfullycharged

ureof80 pounds,applythebrakesand

sapplyproperly.

ST.Releasebrakesandchecktobe

stedpromptlyfromtheexhaustportof

ethroughtheexhaustcheckvalve(fig.27).

ALVE

APHRAGM

ncyValve—SectionalView

NCYAPPLICATION.Withtheairbrake

ethecut-outcockintheemergency

k,anddisconnecttheemergencyairhose

ktobesurethe trailerbrakesapplyauto-

gencyvalveisdesignedtogointoits

onwhen,foranyreason,theairpressure

cutoff,orwhentheemergencyairline

about20poundsbelowtheair pressureinthe

esemitrailer.Theinstantthe emergency

cted,airpressureinthebrakesystemof

oflowoutthroughthe openemergency

gencydiaphragm(fig.26)tobe depressed,


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





ffthecavityleadingtothe emergency

pressurepast theemergencydiaphragm

n,emergencyline.Asthecenterof the

depressed,theemergencyvalveisclosed.

reservoirof thesemitrailerflowsacross

emergencydiaphragmintothecavity

ber,andappliesthe brakes.Theclosed

tsitfromescapingthroughthecavity

.

»3O8367

kValve—SectionalView

hebrakesreleased,coattheexhaust

relayemergencyvalvewithsoapsuds

rpastthe supplyvalve,ortheupper

phragm.

AGM.Withbrakesfullyapplied,coat

suds todetermineleakagepasttherelay

Withtherelayemergencyvalvein

theexhaustportoftherelayemergency

etermineleakagepasttheemergency


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







UPLING.Testforleakageatthe

plingatthefrontof thetrailertodetect

cydiaphragmseal.

akageinanyoftheabovetests

soapbubblein 3seconds.Anyexcessive

d.

kage.Excessiveleakagewillbe

phragms,valves,orvalveseats.Leakage

tedbycleaningthevalve.Iftheleakage

cethevalve.

g.28).

bservethat brakechamberpush

mptlywithoutany evidenceofbinding.

observethatbrake chamberpush

onpromptlywithoutany evidenceof

er—SectionalView


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





hthebrakesfullyapplied,coatthe

ediaphragminplace,withsoapsuds to

ON:Noleakageispermissible.Ifleakage

ts.It isimportantthatallflange bolts

nlysufficientlytopreventleakage.If

edwhentighteningtheflangebolts,the

d,andprematurefailurewillresult.

ETHROUGHPUSHRODCLEARANCE

plied,checkforleakagethroughthe

clearanceholearoundthepushrod,and

ressureplate,withsoapsuds.CAUTION:

Ifleakageis found,replacethediaphragm.

ailureoftheBrakeChamber

agmsareinspected,brakechamberre-

checkedandreplacedifweakorbroken.

mbersprings,itisimportantto install

pe asthoseremoved;otherwise,uneven

bly.Beforeremovingbrakechamber,

yopeningdrain cock.Disconnecthose

moveyokepincotterpin,andyokepin

easingthe pushrodassemblyfromthe

venutandwasher,releasingbrakecham-

cket.Placebrakechamberinaviseso

reaccessible.Removethenutsandhex

ange.This allowsthepressureplateand

ved.Marktheouter rimofthenonpressure

ngpointonthe pressureplatewithacenter

mentwhentheair connectiononthepres-

nedwhenreassembled.

acenewdiaphragmintorecessof

carethatall holesinbothsectionsare in

nddiaphragmagainstthepush rod,

uterflangeofnonpressureplateand

Punchmarksmadeonouterrimofboth

alinement.Installboltsandnutsholding

ressureplateandthenonpressureplate.

sonlysufficientlytoensureanairtight

plateandthe diaphragm,butnotsuf-

hragm.


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







djustersaremountedonthesplined

ts.Theyfunctionasadjustableleversand

meansof adjustingthebrakestocom-

ear.Oneslackadjusterassemblyis used

elassembly.Theyconsistof aworm

—SectionalView


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





dywhichservesasaconnectinglever

dthebrakechamber.Theslackadjuster

keofthebrakechamberpushrodby

cotterpin.Airpressureuponthedia-

berexpandsthediaphragmandimparts

amberpushrod.Thismovementiscom-

ustertothecamshaft.

brakes(par.29)andnote the

pushrodtravelwhenbrakesare applied.

ationsandagaincheckpushrodtravel.

nthe sameasitwasafter adjustment.

eases,orifit isdifficulttokeepbrakes

ckadjustersmustbe replaced.

heslackadjusterfromthebrake

removingtheyokepin cotterpinand

slackadjusternutand lockwasherat

andpullofftheslackadjuster.

ckadjusteron thesplinedendof

lockwasherandnut.Beforeconnecting

od yokeofthebrakechamber,checkto

tightonthecamshaft.Thiscanbedeter-

ckadjusterbackwardandforwardina

ckadjustertobrakechamberyokewith

kepin cotterpin.Rotatetheslackad-

operateseasilyandsmoothly.NOTE:

hone-fourthturn,whichis causedby

.

ndOperation.

.30)are usedintheserviceline

semitrailerstotrap anydirtorforeign

otheselines throughtheairhosecon-

softhe tractortruckaredisconnected

arenotin placeontheairl inecouplings

tionalcaseoftheairfilterencloses

fwound-cottonconstruction.Thelower

withadrainplug (fig.30).

ectdirectionoftheairflowthrough

narrowcastonthe bodyofthefilter.

rtruckto thesemitrailermustpass

ectionindicatedbythearrow.Airflow-


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







7

tionalView

y passesthroughthestrainer,butany

theairstreamaretrappedby thestrainer.

ndmoisturetrappedbythe strainercol-

iltercover,andiseliminatedby removing

cockto releaseairpressure.

dlockwashersattachingcovertothe

thefilter covercontainingthedrainplug-


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





mbetweenthebodyofthe filter

ethestrainersupport.Whenthe strainer

ainermaybe removed.

lpartswithdry-cleaningsolvent.

anbybrushing.Ifanyoily orgummy

ermust bereplaced.

nplacein thebodyofthefilter.

ersupportonthe cover,andreplacethe

rewsandlockwashersattachingthecover

osetheairreservoirdrain cock.

erhasbeenreassembled,testfor

stemtonormaloperatingpressure.Coat

p sudsandapplybrakes.Noleakageis

oundpastthe gasketbetweenthecover

thecovershouldbetightened.If leak

DRAINCOCKASSEMBLY,

ervoiriscylindricalinshapeand

allyweldedseams.Pipe-tappedferrules

andareweldedinplace.It isthefunction

videstorageofcompressedairsothere

availableforimmediateuse inbrake

the reservoiractsthroughtherelay

maticallyapplythebrakesintheevent

ofthesemitrailerfromthetractortruck.

ervoiristo provideaplacewherethe

ssion,maycool.Thiscoolingalsoallows

nsein thereservoir,wheretheymaybe

drain cock.

akesystemcharged,coattheout-

soapsudstocheckforleakage.Noleak-

eakageisfound,thereservoirmustbe

draincocktoreleaseairpressure.

sconnectairlines.Useflashlighttoaid

rrosionor excessiveaccumulationofdirt.

mightweakenthereservoir,replacethe

foundtobedirty,cleanwithhot water


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







.3).

irlinehose couplingsarelocated

ler(fig.3).Theyprovidea simpleand

nectinganddisconnectingairlinesbetween

tortruck.Thecouplingon theright

ilerislabeled"SERVICE,"andconnects

ovehicles.Thecouplingontheleftis

ndconnectstheemergencyairlinesof the

fthecouplingsis suchthatwhenthe

kisproperly coupledtothecorresponding

,pressureisplacedon tworubbergaskets

nairtightseal.This couplingjointcanbe

nnectedbyhand,yetissecuredagainst

alockpin.Hosecouplingsontheair

sothatcouplingsona tractortruckcan

semitrailer,eventhough theymaybe

dummycouplingsusedonthesemi-

bodybyshortchainsattachedtoplates

outsideofthehose couplings.Thepurpose

.3)is topreventtheentranceofdirt,

atterintothe airlinesofthe braking

totheair linesofatractortruck.The

rotecttheservicelineis drilledwitha

eventsair frombeingtrappedinthe

brakesappliedas longasairremainsin.

nnectedandbrakesapplied,coat

uds.If leakageoccurs,replacewornor

sketiswornordamaged,replace

ketfrom thecouplingwithascrewdriver.

cleanthe couplingwithdry-cleaning

osecoupling,giveparticularattentionto

angeof thehosecouplinggasketfits.This

oroughlyclean,otherwisethenewgasket

erly.

a newgasket,partiallycollapseit

onesideofthegasketflangei nthegroove

screwdrivertocompletepushingthe

UTION:I7secaretopreventdamageto


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





f thescrewdriver.Whenproperlyin-

ofthegasketwill lieflat,notbulgeor

onlockofacouplingconsistsofa

rojectsbeyondtheflat connectingsur-

nis maintainedinpositionbyacoiled

thecouplingbyaspring plugonthe

ovethespringplugso thatthespring

edfor cleaningorreplacement.

.

heemergencyandservicecouplings

fVz-inchpipeextendingthroughthefront

gbetweentheupperfifthwheelplateand

nchesinlength,threadedatboth ends,

enframecrossmembersbyjamnuts.Air

hesepipesbytubingconnectors(fig.18).

dtubingfittings,consistingofa

dy,frictionsleeve,andcompressionnut,

ectionsandto attachlengthsoftubing

heairbrakesystem.NOTE:Flared-type

ed forgasolinelinesmustnot beused

rbrakesystem.

unionconsistsof anipple-typefit-

ves,andtwocompressionnuts.Such

tnewtubingrepair sectionsatdamaged

airline.Such arepairismadeby cut-

onandsubstitutinga suitablelengthof

damagedsection.Ifrepairismadein the

etheoldfittingsare notremoved,two

elength ofnewtubingrequiredtomake

laying outthetwobodysectionsofthe

ew tubing,sothatthetotal lengthof

atedunionbodymembersisequalto the

tionremoved,lesstheoverlapof the

eold tubing.Atubingrepairatthe end

ade,exceptthatonlyoneunionisre-

repairedbytheaddition ofnewsections,

withsoapsudswiththebrakes set.No

eTubing.Whenreplacingtubing

edsections,cutthetubingto therequired


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





GROSS.2-WHEEL(2dt),VAN


end ofthetubingis smoothandsquare

llofthe tubing.Makesurethatthe

crimpedormashedoutof shape.

airlineto removeallcuttingsand

yimportantthatthei nsideofthe

.Afittingis attachedtotheendof

anutonthe endofthetubing,tapered

theendofthetubing, andpushthe

recessedseatofthefittingbody.Hold

nd tightenthenutoverthe sleeve

ng.Tightenthenutonly sufficientlyto

useanewsleevewhenrepairingairline

bersmaybeusedagainif inserviceable

thsofhoseandhosefittingsare used

gencyvalvewiththebrakechambers.

eusedtoprovidea meansofmakingflexible

hesepointsbecauseofthespringsuspen-

suponthe semitraileraxle.Theendsof

dedwithdetachable-typehosefittings

dingtheadjacentsectionsofthe hose.

connectornutandpullhoseoutof

tempttoremoveusedsleevefromthe

se totherequiredlength,beingsure the

stothewallline ofthehose,andthat

oth.Blowoutthehose withanairline

cetheconnectornutandsleeveon the

rethebarbs ontheinsideofthe sleeve

hose.Placeanewgasketoverthe

nnectorbodysothesidewith there-

illbenexttothe hose.Removethepro-

asket.Placetheendofthe hoseinthe

uretheendofthehose andthegasket

he bottomrecessintheconnectorbody.

ary,untilitis againsttheedgeofthe

heconnectornutonlysufficientlytoensure

eninstallingthehose assembly,the

ndmaybeused asaswivelbyloosening

ectors.Thehoseshouldthenbeturned

esiredpositionbeforethe connectoris

mitstheinstallationofthe hoseassembly

beingkinkedor twisted.


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





ASSEMBLIES

TA.

Eachhelperandmainspringassembly

o%-inchU-bolts,seatedona pillowblock

ring,andpassing throughholesina

eaxle.The U-boltsaresuppliedwith

washers.Acombinationspringseatand

ngislocatedbetweenthelowerleafof the

hespringseats arespacedontheaxle

eddowelholes inboththeaxleand spring

pringareheldin alinementbyfourspring

he helperspringleavesareheldin

psclampedaroundthefour upperspring

esteel

ch

de,%Qm- thick

,% in.thick

om- thick

ketslides

LIES.Therearendofeachradiusarm

neccentricadjustingbolttothe combina-

armcasting(fig.31).Bothendsof each

rubber bushingswhoseendsarecapped

ontendsof theradiusarmsareattached

frontspringhangersbythe endsoftie

pacertubespositionedbetweenthefront

her,castlenut,andcotter pinareattached

erod.Theeccentricadjustingbolt(fig. 33)

mentof theaxlewiththekingpinof the

y(par.42)(fig.34).

cboltassembly


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





GROSS.2-WHEEL(2dt),VAN

NDARDBODYCORP. MODELF16)


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





ASSEMBLIES

GU-BOLTPILLOWBLOCKMAINSPRING

SARMBRACKETRAPD335755

sembly

ringconsistsof12leaves,including

esin length.Thedepthofthemainspring

ches.Theinnerpairof springclipsis

No.8leaf;and theouterclipsareriveted

pringcenterbolt passesthroughboth

thatbothspringsofthe assemblyare

singleunit.

bly.

esemitraileruntilthemain leaves

ttierodshortspacertubesin therear,and

rmsinthe frontbrackets.Blockthebody

nd lockwashersfromtheU-bolts

blytotheaxle,and removetheU-bolts.

omthehelperspring,andpry thehead

omitsseatin thespringseatcasting.

blyforwarduntilthemainleavesdrop

embly.Slidethespringassemblyback-

themainspringisfree fromthefront

pringassemblyovertheaxle andremove.

dHelperSpring.Themainspring

togetherbyacommoncenterbolt.The

atedonthetop ofthehelperspring.

pringcenterbolt, andliftthehelper

.


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







ves.UseaC-clamptoclampthe

point nearthecenterbolt.NOTE:Do

.Removetheboltsfromthe innerand

Easeoffthespringleaftension against

ringleavesbecomelooseon thecenter

e centerbolt,andreplacebrokenleaves.

g.Positiontheleavesofthemain-

hespringcenterbolt.Usea C-clamp

pointnearthecenteruntilthe spring

n thespringclips.Replacethespring

amp.Replacehelperspringonthe

urewithcenterbolt nut.

y.Slidethespringassemblyover

ontendinthefront springbracket,sliding

theradiusarmas aguide.Slidethe

r endofthespringwill passinfront

tierod.Liftthespring,and insertthe

arspring bracket,restingonthebracket

overtheaxleanduponthe springseat

ockinpositionoverthespring center

ng.ReplacetheU-boltsoverthespring

xle.Replacethespringclipplate, and

bolthighnuts.NOTE:Makesure that

reseatedinpositionbeforetighteningthe

LIES.

centric(fig.33).

eoftheradiusarm eccentricadjust-

emeanstorealineanaxleassemblythat

ekingpinoftheupperfifth wheelas-

ementtendsto "dogtrack,"ortrail

hepathmadeby thetiresofthe

tioncausesthetrailerto "whip"while

olofthe tractortruckandsemitrailer

scondition,ifnotremediedatonce,

etirewear.

ENT.

alevelsurface,lowerthelanding

ractortruck.

semitraileruntilthe springsrest

acerrodat therearandon theends


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





ASSEMBLIES

dEccentricAdjustment

rontofthespring; andthewheelsare

ground.Blockthebodysecurelyin this

elsofbothdual wheelassemblies

entbycarefullymeasuringthe

fthekingpinto thecenterpointofthe

dle end(fig.34);andby measuring

erofthe kingpintothecenterpointof

xlespindle.NOTE:Thelengthofthe

mustneverbegreaterthanthe check

t maybeasmuchas one-eighthinchless

ftheleftside. Ifthedifferenceinthe two

hanone-eighthinch,theaxlemustbe

nthe sideonwhichthelonger

Thelongermeasurementshouldalways

less theaxlehasbeenmisalinedas the

totalrequiredadjustmentislessthan

nusuallybecompletedbyresettingthe

only.


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







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




ASSEMBLIES

theoutsideendofthe eccentric

nut untilitis runoutonthe bolta

theeccentricboltassembly

stthespringseatand eccentriccasting.

deofthe eccentricboltassembly

eradialseatsinthe adjustingcasting.Fit

shoulderonthe insideoftheeccentric

he directionwhichrotatesthewideface

xle.Thismotionwill movetheendof

dshortenthe "checkdistance"between

the centerofthekingpin.Stopthe

itionas toplacetheeccentriclockpin

n seatsintheeccentriccasting.Again

ntbymeasuringthedistancefromthe

hof theaxlespindlecenters.CAUTION:

-handmeasuremaybeasmuchas

ht,orcurb,sidecheckmeasure;butit

womeasurescanbebroughtwithinthe

djustmentisrequired.NOTE:Therea-

suremaybeas muchasl/&inchmorethan

utmustneverbeless, istocompensate

theconsequentshiftingof centerof

ddedstrainontherubberbushingsof

asthe effectofslightlyelongatingthe

andconsequentlylengtheningtheaxle

nthat side.

ssemblynutwhenthe!adjustment

thelockpinof theeccentricboltassembly

ftheeccentriccastingandreplacethe

tisrequired,followthe samepro-

tricassembly;exceptthat,tolengthen

th,theeccentricboltisturnedinthe

ewidefaceoftheeccentrictowardthe

eaxleawayfromthekingpin,thus

tweenthekingpincenterandthecenter

dle.Bringthetwomeasurementswithin

tep(d) above.

e eccentricboltassemblyas

replacethe cotterpininthe endofthe


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






semblyPartiallyDisassembled

omunderthesemitrailer,andthen

sembly.

rame onthesidefromwhichthe

beremoved.Theframeshouldberaised

hesideraised)arejust offtheground.

f theU-boltsfromthespringclip

olts.

gbrackettierod castlenutcotter

castlenut..

endofthespring totheframe

he endoftheradiusarm.

e rodfromthefrontspring hanger

ontendof theradiusarmofthe radius

seatin thespringseatandeccentric

etfromtheaxle.This operationfrees

ndit mayberemovedas.aunit.

Assembly.Withtheradiusarmas-

babove),theentireeccentricassembly

centricboltcotterpinandtheeccentric

todrivetheeccentricboltfrom the

ovethekeyedeccentricandthekeyed


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





ASSEMBLIES

centricbracket,andforcetherubberbush-

endboreoftheradius arm.Thisoper-

oftheeccentricassemblyfromtheradius

entricassemblyhasbeenremoved,any

replacement.

bly.Insertrubberbushinginstraight

itionintheeccentriccasting.Replace

ubberbushing,andreplaceeccentricbolt

ckpinoninside.Replaceoutsideferrule

eyedeccentricwiththeeccentricboltkey-

eplaceflatwasher,castlenut,andcotter

eforeseatingthepin intheradialgrooves,

entertheeccentricsothatthewiderface

themaximumadjustingrange,andboth

this positionwhenreinstalled.NOTE:

ementfollowingreassemblyandinstal-

ccentricassemblies.

sembly.Whentheeccentricassem-

ompleted,theentireradiusarm andeccen-

yreversingtheprocessof removal

tandeccentriccastingonthe axle,

emblyonthe springseat.Replacepillow

and installU-boltsinposition.Passends

spring clipplateundertheaxle,and

highnuts.CAUTION:Donottightenthe

nitsofthespring andradiusarmassem-

position.Centerthebushingboreofthe

minpositionin thefrontsprings

d backinpositionthroughthespring

eroneendof therubberbushing,and

erthe tierodandinto thebushingbore

theferruleon theoutsideendofthe

atwasher,lockwasher,andcastlenut.

ysuspensionsupportingthefrontend

me,allowingthespringtodropagainst the

dualwheelassemblies.

26).

gfromundersemitrailerframe.

ks.


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







TA.

rop-forged,ofmodifiedI-beam

piece.Theforgedaxleisheat-treatedto

thwithminimumweight.Theaxlespindles

Timkentaperedrollerbearingsonthe

take No.5565Timkentaperedroller

s.The endofthespindleis threadedto

forVi-inchcotterpin, andhasamilled

tweenthespindlenut andouterwheel

reprovidedinsidethespindlesectionsfor

ntingplates.Eachmountingplateisheld

tbolts.Springseatsarealined ontheaxle

dowelholesin theupperfaceofthe

he combinationspringseatandeccentric

arespacedinthe springseatandeccentric

ngof38 inchesbetweenspringcenters.

rged tothepropercamberforthe rated

ailer(pars.45and 64).

tion

ameuntil thespringsrestonthe

erearspringhangerbrackets,andonthe

thefrontspring hangerbrackets.Block

osition,leavingthe spacebehindtheaxle

heelassemblycanberolledfrombeneath

ched.RemovethefourU-boltsholdingthe

mbliesto theaxle(par.41b). Detach

hebrakechambers(par.34).Prythe

astingsfromthedowelspacerpinson the

eassemblybackto therearofthesemi-

bracketspacerdowelpinsfromthedowel

acethe axleandwheelassemblyonsup-


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





refreefromcontactwiththeground.Re-

es(par.25).Removethebrakeshoesfrom

(par.30).Removethecamshaftsfromthe

emovethebrakechambersandcamshaft

m(par.34).Removethebrakemounting

eflangesby removingtheeightbolts

eforCamber

end


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







eplacementisnotcommonbutmay

okenaxle,a bentaxle,orbyan axlewhich

axle,oranaxlewhichhas lostitscamber,

buteither conditionrequirescarefulcheck-

t.

.37).

sidesof thesemitrailerframebehind

djackup untilwheelassembliesareoff

assemblies(par.25).

egagein positiononthefrontside

necessarytoremovetheaxletocheck

mber.

ofthegageagainstthe centerlineof

noneaxle spindle,adjustthetwoprongs

geuntiltheycontactthecenterlines of

surfacesof theotheraxlespindle(fig.37).

llthreeprongs ofthegagetouchingtheir

esalongthecenterlineoftheaxle spindle.

earsideof theaxle,andagainplace

hebearingfaces.Ifeitherprongon the

egagefailsto touchwhenappliedalong

ingsurfaces,abentspindleisindicated.

minetheamountofthebend.If theindicated

inch,replacetheaxle(subpar.dbelow).

dlerevealsnobend,reversethegage

he oppositespindleoftheaxle,andcheck

thatspindlewithoutchangingtheadjust-

ranceoccursateitherbearingface,check

d isinexcessof0.002 inch,replacethe

bleprongsarein contactwiththecenter

s,theaxle isnotbent.

fig.36).

legagein exactlythesameposition

emannerasin checkingaxleforbend

iondirectlyundertheaxle.Inthis

stbetweentheinnerprongandthe center

urface.Theamountofthisclearancemust

ditmustnot belessthan0.060inch.If the

imits,replacethe axle.


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





BLY

axle(par.44).

suitablesupportswiththeVa-inch

ntingbrackets.

bracketsandthebrakechamberas-

toseethatthe counterboredseatsforthe

haftbracketsfaceinwardtowardtheslack

t ispossibletoreplacetheball bearings

mshaft.

sandtheslackadjusters(pars.31

es(par.30).

assemblies(par.25).

n thedowelholesinthe upper

ndroll thewheelandaxleassembly

xleunderspringseats sothatthedowel

welholesinthelowerfaceof thespring

ringclipplates,lockwashers,and

orstobrakechambers(par.34).

eradjustment(fig.21),andadjust

ngfromunderthesemitrailerframe.

BLY

TA,

N.Theframeisfabricatedofstruc-

framesiderailsconsistsofa 10-inch

hesin length,upononeendofwhich

annelincreasingeachframememberto

Viinches.Thelowerframelinehas

nneljunction,andtheupperfrontframeline

ction.Thesiderailsare rigidlyjoined

turalchannel.Bolstersof6-inchI-beam

onthe10-inchframesection,and 4-inch-


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







e6-inchchannelsectionof thefrontof

bothbolstersandoutriggerslie inthe

hefloorof thesemitrailerbody.Abumper

earendoftheframeand theupper

hekingpinis attached,andiswelded

rontsectionoftheside framechannel.

extendsbeyondthefront bodywall,

stthelowerfifthwheelplateof the

mitrailerisattachedtothe tractortruck.

o conformtothefrontbodylines,and

hebodyoutrailsare weldedtoendsof

soas bodysills,constitutingintegralchassis

nitdesign.Springhangercastingsare

d flangeoftheframechannel.Thetire

edtotheright framememberbyhookbolts,

ebracketis rivetedtothefrontof the

epointof theframedrop.

sbumper332Viin.

rubrails93 in.

th40l/a in.

onfromfrontoutrail3l/2in.

rameline5Viin.

FTHWHEELPLATE.Theextension

upper fifthwheelplateis3%6inches,

2.875inches.Thekingpinmountingflange

ndisweldedthroughholesinthe flange

pperfifthwheelplate(fig.39). The

efaceofthefifthwheelplate atintervals

e flange.

erbumperconsistsofa6-inchstruc-

boltsandmountingplatebracketstothe

bumperisfurtherreinforcedbydiagonal

ndframe(fig.38).

N.Thebodyofthesemitrailerisof

ngmetalsidesandroofcoveringsper-

bodyframe.Theseamsofthe bodywall

al"snap-on"typemoulding.Themetal

sealconstruction.Theloweredgeof each

tedbyaprotrudingrubrail whichacts


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





BLY

E

E

NUT

LOCKWASHER

talimpact.Thetwodoorsin therear

rtedby threehinges.Thebodyside

hfirpanel board,screwedtothebody

lityinmakingrepairs.

erstructureframingofthesemitrailer

on,reinforcedatpointsofstrain bysteel

dyframeare rivetedtothemetal

oining thebodyandthechassisframe

opbowsaresupportedonthe upper

frame,andareattachedtothe posts

chend ofthebowandto theopposed

sareof thetightpin-strap-and-

acketofthehingeis cross-boltedtothe

e,andthestrapis boltedtotheface

kis ofheavy-duty,triple-bolt

handle.Thelockhandleand escutcheon

sfor padlockingthedoors.

okassembliesofthesafetylatches

andthe keepersarescrewedtothesides


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





NGROSS,2-WHEEL(2dt),VAN


EKINGPIN

are usedtoholdthedoors openwhen

militarytype IDwithattaching

dooris lockedshutbymeansof

defaceofthedoor attopedge.

BLIES.Eachofthe2 chockblock

ngthof Vi-inchchainwitha pear-shaped

riangular-shapedchockblockis attached.

derthe bodyfloorbyasafetysnap

ergencyparkingbrake.Thesafetysnap

efreeendofthe chainisattachedto

tpermitstheblockto beusedeither

altires.Each chockblockisbuilt up

A inchthick,andboltedtogether.

floorisIVi inchesthick,andis

stersand outriggersbyself-tappingmetal

e floorlineatthe dooropeningispro-

ncountersunkintothewood.

n.

all- 74%in.

76in.

g, 87in.

g..._,,.70 in.


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





BLY

INTENANCE.

sisframeandvan-typebodyarecon-

,they cannotreadilybedisassembled.

assisframe-providessufficientstrength

ccidentaldamage;butif damagedoes

thoutdifficulty.Accidentaldamageto

dto arelativelysmallportionofthe unit,

emustbe governedbythenatureand

eframeassemblyshouldbecarefully

rvals.Lookespeciallyforbent,broken,or

reportsuchdefectstohigherauthority.

screws,andcheckalldoorhardwareto

econdition.

spurposeandexposedlocation,the

amagethananyotherunitofthe frame

hebumper,aswellas itsdiagonalbraces,

ramebyremovingthebumper mounting

damagedbumpermayberemovedfor

BLIES.Carefullyinspecttheattach-

aintothe frametoseethatit issecure.

be sureitis ingoodconditionandthat

heckthedoorsafetylatches,andkeep

ightenedonbothdoorand bodyplates.

ssecuredwithboltsand lockwashers

anentlytight.If,however,thelock

ce,theplywoodliningpanelofthedoor

kassemblyis accessibleforadjustment

theinsideoftheleft-handdoor.Be sure

in thekeeper.

conditionofthescrewsholdingthe

bottomedgesof thebodysides.Keep

elostor brokenscrews.Inminoracci-

quentlyrequiredtoabsorbtheimpact

rubrailoccurs,removethedamaged

eplace.

METAL.Minordentsinthe metal

eringoutthe dentsfromtheinsideof

ather-sealedcrossseamsofthetopare


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







theaccident,hammerthemetalof

caulkthejoint, andclinchtheseam

eringthemetaljoint inplace.Theouter

stenedwithboltsorscrewsandsoldered.

thisseam,removetheboltsor screws

on,hammerthemetalbackintoposition,

ANEL.Torepairadentedor dam-

epointof damageontheinsideofthe

osedplywoodliningpanel.Hammerthe

entherepairhas beencompleted,replace

the screwswhichsecureit.

nordamagetothedoorscanbere-

hedoors.If,however,removalofthedoor

woodliningofthe door;thenutshold-

removedwithanendwrench.Remove

door.

TA.

eentireelectricalsystemofthe

mtheelectricalsystemofthe tractor

ughthejumpercableofthe tractortruck

ocketassemblyofthesemitrailer.The

mitrailerconsistsofbothserviceand

ights,aservicemarkerlight circuittothe

servicedomelight circuitcontrolledby

(fig.40).

NDBLACKOUTTAILLIGHTCIRCUITS

ndtail, andblackouttaillightcircuits

rnessextendingfromthejumpercable

koutswitch(G)anda harnessextending

oafour-postjunctionblock(H) onthe

sframe.Fromthejunctionblockaharness

opandtaillight (I)ontheright, orcurb,

a harnessextendsfromthejunctionblock

andblackouttaillight(J)atthe rear


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





.Theblackoutswitchislocatednearthe

erbody,about32inchesto therightof

socket.Theblackoutswitchisemployed

m servicetaillighttoblackouttaillight,

oservicetaillight(fig. 41).Themain

hiscircuitextendsfromthe blackoutswitch

ght framesiderail,alongtheservice

fthwheelplate,acrosstotheinside ofthe

,andalongthewebof theframesiderail

ockonthe rearcrosssillofthe frame.

the serviceairlinebyclampbands,and

tedto theweboftheframeside rail.

T.Themarkerlightcircuitiscarried

by awiringharnessextendingfromthe

frontoutrailofthe frame,througha

eside railtothefront centerlineofthe

beneaththe floor,upthefrontof the

chesinthe roofbowstoatwo-postjunction

.Themarkerlightsinthe frontofthe

izedfromleadswhichbranchofffrom

owofthetopframe.The markerlights

nectwiththetwo-postjunctionblockon

Allmarkerlightsareon whenthesemi-

on"SERVICE"lightofthe blackout

ackoutswitchison "BLACKOUT."

Thedomelightcircuitis connected

ockontherear topbowofthebodyby

hichcarriesthemarkerlight circuit(fig.

witchofthedomelight circuitislocated

ngpanelof thebodyata pointjustfor-

erpost(par.5e ).Thedomelightsare

nlywhentheblackoutswitchis on

tcircuitisnotenergizedwhentheblack-

UT."NOTE:Domelightswilllightonly

his onandtheblackoutswitchison

).

psSinglecontact

res

ividualgrounds


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







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




P

NGSOCKETTERMINALS

HWIRINGHARNESS

uits

l.

WITCHHARNESS.

ngthejumper cablecouplingsocket

ilerandpullthesocketassemblyoutuntil

terminalandassemblycapisaccessible.

kwashersecuringthe groundter-

mblytothe centerboltofthecoupling

minalandthecapcoveringthe

tuds.

nd terminalcapsfromthecoupling

hichtheblackoutswitchharnessterminals


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






seterminalstudsare marked"TL"and

ofthe couplingsocket.

witchharnessterminalsfromthe

ecuredtothe bodyofthesemi-

allockwasheronthethreadedneckof the

ngtheslottedswitchcontrol,protrudes

ypanel.Removethenutandlockwasher

etheblackoutswitchbackthroughthe

lowertheswitchintoapositionbeneath

rframe wheretheconnectingterminals

washers,andboltsecuringthe black-

ettothe switchcase.Removethecover

ewsholdingtheblackoutswitch

andpasstheterminalconnectorsoutthrough

witchcase.

pulledthroughthegrommetinthe

harnessisinstalled byreversing

theoldharness.Referto thewiring

guideincorrectlyconnectingallterminals

ISHARNESS.

witchbyfollowingtheprocedurein

nectthemainchassisharnessterminals

ackoutswitch.

nessthroughthegrommetin the

sspassesfrombetweentheupper

mitrailerfloor besidetheservicelineof

totheair linebybandingclips.Access

pperfifth wheelplateandtheflooris

ortsectionsofflooringboardsat the

r. 65c).Disconnecttheroofharness

gterminalofthemainchassisharness,

mthefront endofthemainchassis

eclampswhichsecuretheharnesstothe

vertheupper fifthwheelplate,andpass

ehole inthecrossmemberoftheframe

erfifthwheelplate.


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




cableclipswhichsecurethe main

trail oftheframe.

gtheharness terminalstothestuds

ocklocatedontheinner faceoftherear

yreversingtheprocedurefollowed

s.Referto wiringdetail(fig.41)for

nalsofthemainchassisharness.

IGHTHARNESS.

sterminalsfromthefour-postjunction

lipboltandcableclipholdingthe short

crosssillofthe frame.Turntheharness

thetaillightassemblyto releasethe

theconnectorfromthelight socket.

ghtharnessbyreversingthe pro-

ngtheoldharness.Refertowiring detail

ectingharnessterminalstofour-post

GHTHARNESS.

minalsfromthestudsofthe four-

vethethreecableclipboltsandcable

htharnessto therearcrosssill ofthe

onnectorineachsocketofthetaillight

nnectorlockpins,andpullthe harness

ockets.

yreversingtheprocedureforre-

eferto wiringdetail(fig.41)as aguide

arnessterminalstothe four-postjunction

HARNESS.

ningpanelfromthefront center

emovingthe screwswhichsecurethe

dyframe.

ectionsofflooringboards inthe

oor.

alofthemainroof harnessfromthe

ssisharness.Thisconnectionislocated

theframeat apointnearthefront of

blethroughtheholeinthesemitrailerfloor

oshortsectionsof floorboards.

ainroofharnessup alongtheinside

hebody,andpullthrough thecurved

framingofthe trailer.


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







of thefrontmarkerlightsandthe

ctiveterminalsofthe mainroofharness.

ngtheterminalof themainroof

cklocatedonthe rearroofbowofthe

heterminalfromthestud ofthejunction

endofthetrailerroof, workthe

esintheroof bowsuntilfreeofthe front

ssecuringtheharnessto thefront

at thefrontofthetrailer.

harnessbyreversingtheprocedure

ss.Referto wiringdetail(fig.41)asa

sstoterminalswheninstallingnewharness.

HARNESS.

essterminalsfromtwo-postjunction

.Removecableclipscrewsandcable

stobodytopbow.Disconnectharness

rearmarkerlights.Removescrewswhich

leswitchto uppercorneroftherearleft

theswitch,anddetachtherear roof

toggleswitch.

arnessbyreversingtheprocedure

dharness.Refertowiring detail(fig.41)

harnessterminalswheninstallingnew

RNESS.

und harnessatthedomelighttoggle

swhichsecuretheswitchtothebodylining

romthe bodywall.Disconnecttheground

gleswitch.Removethescrewwhich

ssterminaltothe rearleftbodypost.

arnessbyreversingtheprocedurefor

.

LINGSOCKET.

bleCouplingSocket(fig.42).

LECOUPLINGSOCKET.Referto

DURE.

ashersecuringwiringharnessground

mblycovercap,andremovethegroundhar-

mblycap.


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





SERT

T

SE

SULATOR

R

R

SEMBLYCAP

WASHER

etParfiaflyDisassembled

swhichsecurethe fourterminalstud

inalcapsand harnessterminalsfrom

umpercablecouplingsocket.

utsat thebaseofeachof thefour

ngsocket assembly.Removetheretaining

nassemblycenterbolt.

ersfromterminalstudsand assembly

mblyofthemainunit ofthecoupling

enterassemblyboltandremovingthe

actbladesfromthecase ofthecoupling

rcablecouplingsocketbyreversing

isassemblingthecouplingsocketassembly.

h.Refertoparagraph49a.

utswitch(fig.43)consists primarily

gaterminalblocksupportingsixterminal

onnectorscrews.Eachterminalisidentified

hatharnessterminalscanbe readily


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







S

ONBASE

TS

SHERS

VER

TTON

KWASHER

T

chPartiallyDisassembled

witchterminal.Theslottedswitchkeyin

s turnedbyinsertingacoinor screw-

eandcontrolkeyoftheswitchis protected

ain andwaterbyacircularcoverattached

errimofthe switchface.Completedis-

ot practical.Adefectiveswitchmustbe

entaldamage,theblackoutswitchshould

are.NOTE:Caremustbeexercisedin

wiringharnessterminalstopreventacci-

atemechanismoftheswitchassembly,

ocationofthe blackoutswitchon

curvedbodypanelofthefront ofthe

itchtothedangerof accidentaldamage.

tlyandtestit toseethatit isinproper


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




esingle-poledomelighttoggle

ghtcircuitonlywhenthe blackoutswitch

elightcircuitis offwhentheblackout

Thedomelightswitchisconnectedtoa

roofharnessandtoa terminalofthe

40).Theswitchtoggleis protectedbya

edbytwoscrewstotheli ningpanelof

fthedomelightswitch(par.5 e)

ctionfromaccidentaldamage.Theswitch

pectionorremoval.

tch.Exceptforminoradjustment,

tchshouldbereplaced.Thedamaged

SSEMBLY.Thetaillightassemblyisat~

tbytwostuds inthebodycaseof the

ht harnessconnectorinthelightsocket

pullouttheconnector.Removethenuts

studswhichsecurethe lightunittothe

ovethetaillightassembly.

LAMP-UNIT.Useascrewdrivertore-

frontcoverofthe taillight,andremove

seof thelightassembly.Slidethe

caseofthel ight.Lampsofasealedunit

ceadamagedunit(fig.44).

P-UNIT.Insertthenewsealedlamp-

tcase;replacethefront coverinposition

ewholesinthe coveraredirectlyover

nthe case.Replacethecoverscrews.

ositionthefixedstudsofthetail-

nthetaillightmountingbracket,and

ndnutsonthe mountingstudsofthe

Removethewoodscrewsholdingthe

movethe screwsholdingthelightcover


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






EWS

SING

LOWERUNIT

TUPPERUNIT

SINGDOOR

CREWS

UTLIGHTHOUSING

AILLIGHTUPPERUNIT

OUTHOUSINGDOOR

hfandMarkerLight,Disassembled

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



y.Removethefaceofthe domelightfrom

ghtsocket.Removethedefectivelamp

ewithanew lamp.

LENS.Removethedomelightas

thesnapr ingfromthefaceandlens

t,andremovethe defectivelens.Replace

lacethesnapring thatretainsthelens

ht(B,fig.44).

.Replacethedomelightcover,and

gthecovertothe faceandlensassembly.

whichsecurethedomelighttothe bodytop.

MP.

curingthemarkerlightto thebacking

tbodyand lensassembly.Removethe

e lightbackingplateassembly.

tsocket,andreplacethelightbody

ngthelightbodytothe backingplate.

HTASSEMBLY.

ssecuringthebodyandlens assembly

movethe bodyandlensassembly.

wssecuringthe lightbackingplate

e semitrailer.Disconnectthewiring

tassemblyfromthe rearroofwiring

ailofthemarkerlight assemblyout

ngplateassembly.Removetherubber

pig tailofbackingplateassembly.

connectorfromthebackingplate

mpfromthelightsocket,andpushthe pig

hesocket.

blyis replacedbyreversingthe

TA.

elandinggearassemblyisattached

0-inchsidesillsof thechassisframeat

p,and tothetwocrosschannelsofthe

earofthe framedrop.Thelandinggear

edto thesiderailsof theframe,andthe


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





ssecuredtocrossmembersoftheframe.A

srivetedtotheright siderailofthe frame

aftofthelandinggear assembly(fig.45).

hafttothe shaftofthegearassembly.

crankshaftsothatitcanbe suspended

ennotin use.Thelegsofthe landing

pensateforvariationinthe heightoffifth

ortrucks.

EMBLY

CE

arance13in.

%in.

gearisoperatedbya crankthrough

alwormscrew.Thewormscrewpasses

ssemblyattachedtothebackbracesof

nd wheelassemblyisloweredbyturning

ckwisedirection,andraisedbyturning


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



ction.Toraiseorlowerthelandinggear,

crankholderonthe crankshaft,seatthe

crankshaft,andturn.Thetrailer must

oundwith thelandingwheelsdown.

chedtoa tractortruck,thewheelsmust

esemitraileris moved.

ARMECHANISM.

dBackBraceAssembly.Jackup

and placesafetyblocksundertheupper

thenuts,lockwashers,andboltssecuring

thehub capsandwheels.Removethepin

acestotheoperatingnut assembly,and

securethebackbracesto thelegassem-

ces.Removethetwonuts,lockwashers,

legassemblyto theleghingebrackets

heleg assembly.Removethetwonuts,

curingeachlowerlegcastingto theaxle

eshaft.Removethefournuts,lock

gthecrossbracestothe lowerlegcastings,

sfromthe crossbraces.

ScrewMechanism.Removenuts

coverplate,and liftoffthecoverplate.

her,andboltfromeachendof crankshaft

lloutthehandcrankandcrankshaftas-

fromhub ofmitergear,releasinggear

earingsleeve,gear,andshaft.Removethe

orizontalscrewshaft,anddriveout

movethegear,thrust bearing,andsleeve

eendofthewormscrew.Removenut,

arof thewormscrewhousing.Pushthe

thrustbearingis outofthehousing,

omtheend ofthewormscrew.Pullthe

cketfromthehousing.

thoroughlyin dry-cleaningsolvent.

lparts inordertofacilitateinstallation

ergearandwormgearteeth for

eplaceifdefective.Inspectthrustbearing

ceifwornor damaged.Inspectthehand

replacehandcrankhandleifbentor

nutandthewormscrewforextremewear

ditionisnotserviceable.


G o o g l e - d

i g i t i z e d

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http://slidepdf.com/reader/full/tm-894-semitrailer-omaha-f-16 112/139 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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ewormscrewandgearhousing.

the housingtotheframeare tight.Inspect

ket.Replaceifdamaged.

ectthelandinggearlegs fordamage.

ctthebearingsoftheupperleg hinge

earingsifworn.Inspectthelandinggear

ilholesarefreefromobstruction.Remove

nspect.Replacewornlandinggearleg

bolts andnutsoftheassemblyfor

wornordamagedboltsornuts.

echanism.Startthebronzenut and

nthewormscrew.Holdthebracketand

he bracketisatthefront endofthe

aringontherear endofthewormscrew,

ndbracketassemblyin thewormand

ethrustbearing upwiththeboltholes

ear thrustbearingbyinstallingbolt,lock

erearend ofthehousing.Placethe

dgearonthe frontendofthewormscrew,

e wormscrewshaftandthegearhub.

the jamnut.Installthemiter gear

earingonthe mitergearassembly.With

pthegearonthe endoftheshaft,at the

perholesinthegear hubandshaft.

vingin thetaperpin.

Slidetheconnectingsleeveonthe

bolt,lockwasher,and nutsecuringitto

haftofthe handcrankassemblythrough

,andinserttheend ofthecrankshaftin

heendofthe gearshaft.Lineupthebolt

eplacelockwasherand nut.

tionthegearhousingcoverplate

and installthenuts.

raceAssembly.Reassemblethe

eassemblyandcompletetheinstallation

eforremovingtheassembly(par.55 a).

elsofthelandinggearassemblybefore

shaft,andlubricatethe landinggearat

tionOrderwhenreassemblyhasbeen


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




ARRIER

AINTENANCE.

wheelandtirecarrier assemblyis

,lockwashers,andnutsto theright-hand

bout52inchesforwardfromthe front

andtireassemblyis elevatedintoposition

typedoublecablelift.Theendsofthe

ts,lockwashers,andnutsto ananchor

heelevatingmechanismispassed

fthe wheelandretainedinpositionby

atingmechanismofthecarrierispro-

d tireassemblyinpositiononthe four

carrier.Thewheelandtireassembly

thecarrierby meansofnutsofthesame

sedtosecurethewheelassemblytothe

winchof theelevatingmechanismis

itionby aratchetwheelmountedonthe

tofthe winch.Theratchetislockedby

meof thecarrierassembly,andpositioned

eratchet.Thewinchofthetire carrier

ythetirewrenchofthe tractortruck

r.

ING.Precautionmustbetakentosee

oltssecuringthetire carriertotheframe

ght. Thesenutsarelocatedonthe

ierframe.

MBLYMOUNTINGNUTS.Keepthe

blymountingnutstight atalltimes.The

gnedtocarrythe weightofthemounted

LTS.Keepthefournuts securingthe

tstight.

TIREASSEMBLYFROMCAR-

efournutssecuringthewheelandtire

me.Placethetire nutwrenchonthe

andreleasethe tensionagainstthepawl

sengagethepawlofthe ratchetassembly,


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e assemblytotheground.Disengagethe

rrieroperatingmechanismfromthewheel

TIREASSEMBLYONCARRIER.

sparewheelandtireassemblydi-

mechanismofthecarrierwiththe convex

wardthe carrier.Disengagethepawl

rthecableanchorplateto thespare

nserttheanchorplate inthehubhole

pacerstopsof theanchorplateinthe

positionthepawlinthe teethofthe

utwrenchontheoperatingnut ofthe

eelandtireassemblyintoposition onthe

e carrier.Securethenutsontheanchor

dtireinposition.Disengagethe pawl

t backinpositionafterthetensionon

enreleased.


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EINSTRUCTIONS

regardingoperationalinspections,

mentofthesemitrailerbrakesystem,refer

8to 39.Troubleshootinginformation

rveasageneralguide incheckingthe

aultyoperation,andwhethersuchmal-

of theairsystemorto defective

akeassembly.

designedbrakesareusedonthisvehicle,

ceinstructionsfortheslackadjusters,air

ergencyvalve,andthebrakechamberswill

isthepurposeofthis sectiontocover

ection,andrepairof thebrakeshoes

ON,ANDREPAIROFSHOESAND

movethebrakeshoes(par.30)and

udingthelinings.Removeallcapscrews,

uringliningstoshoes.Carefullynotethe

sto determinewhethersalvageis

cleaninghasremovedalltracesofim-

ustbescrapped.Iffree fromoilandof

uniformity,theblockcanbereinstalled.

stalledonshoeafterdisassembly,mark

ssembly.Onlysalvagedliningsof the

talledona brakeshoeassembly.Never

edblockonthesameshoe.Ifbrakeshoe

aftercleaning,replacerollerorroller

c).Iftheoilitebrake shoebushingsare

utthedefectivebushings,andreplace.

shings.Pressonebushinginto

e,leavingtheend ofthebushingflushwith

otherbushingintoborefromthe opposite

memanner.Shoebushingsaresupplied

r.Testanchorpinin bushingborefor

y,reamto 1.132inchessubpar.ebelow).


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






s.Positionrollerin slottedsection

nstallrollershaft,using asofthammer.

onin shoebyplacingfourheavycenter

esadjacenttoshaft atfourequallyspaced

shaft.CAUTION:Whenmakingcenter

rollershaft withpunch.

brakeshoehasbeensteam-cleaned,

eofshoes.

rances.

shing1.3155in.

fterassembly)1.132in.

cebeyond)0.25in.

.313in.

gs.Placenewbrakeliningscrew

ning.I ftheheadofthe screwprojects

urfaceofthelining,discardthelining.

nalcountersunkholesinwornlinings to

ush withoutersurfaceoflining.

M(fig.14).Removethebrakedrum

anallparts.

.Checkbrakedrumforout-of-

within 0.010-inchtotalindicatorreading.

mifoutof-roundisnotexcessiveanddrum

condition.Heatchecking,unlesssevere,

replacement.Checkinsidediameterof

Remachineifwearisnotexcessive.Replace

sible.

Itispermissibletoremachinedrums

eir originaldiameterwithoutshimming

ent,thedrummaybemachinedbeyond

drumbrakingsurface;however,shims

weenbrakeblocksandbrakeshoes used

shimsmustbeof properthicknessto

ebetweenbrakelininganddrum.

.Positiondrumoverdrumpilotof

gstuds inthehubassembly.Replace

ts.NOTE:Tightenopposednutssucces-


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topositiononthehub evenlytoprevent

erances.

d16.030in.

TA.

heaxle isforgedwiththeproper

tedloadcapacityofthe semitrailer.This

oundsisexclusiveofa safetyfactorsuf-

alemergencyoverloadswithoutproduc-

oftheaxle.CAUTION:Intentionalover-

illnot bepermitted.Mostcasesofper-

eduetoaccidentratherthanoverloading.

edon twofocalpointslocatedonthe

tersofthe springs,andthemaximumbend-

s.Permanentaxledeflectionduetoover-

points.

dle,outsidebrakeflangeface....14V6in.

er27/&in.

akeflangefaces49%in.

axledowelholes36in.

n.

ON,ANDREPAIR,

vetheaxleassemblyfromthesemi-

ar.44).

leantheaxleandallitsparts.Scrape

theaxlebeam.

hreadsfor excessivewearordam-

weldingnewmetalandremachinenew

processmaybesubstitutedforwelding

r remachining.


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




GROSS,2-WHEELC2dt),VAN

NDARDBODYCORP.MODELF16)

rwear.Buildup wornseatsbyweld-

nd remachinebearingseats.

d37).

rbend (par.45b).Ifbend in

catedbygage,employcold-pressprocess

(par.45c). Ifclearanceontheaxle

inch,orlessthan0.060i nch,employ

mberaxlewithinindicatedlimits.

axlespindlenutsforwornor stripped

badlywornordamaged,discardnut.

TA.

eframeandbodyofthe semitrailer

anintegralunit(par.46).The drop-type

bricatedofstructuralchannelsandI-beams,

binethegreatestpossiblestrengthwith,

rbroadshocks,andto minimizethepos-

aresultofvibration.Theelasticityof the

e ofreinforcedwoodframing.Metal

sedatpointsofgreateststrain inthewood,

hemetalsidepanelingof thebody

hewooduprightpostsofthe bodyframe,

erbodyplates.Thejointsofthe side

nap-on"moulding.Thebasememberof

nailedtothe woodframemembersof

enthedomecapand thefrontbody

ticmoulding.Thelowerbodyline ofthe

aflat strapmetalmoulding,andthelower

elsarecovered,andprotected,byformed,

the bodyframebyscrews.

medupon 16-gagemetalchannels.


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unit,coveredbyametaloutsidepanel,

insideliningattachedtothemetal

adingmetalscrews.Anoakbackingrail

yoppositethepointof attachmentofeach

he hingestrapsaresecuredtothe doors

bolts.Thedoorlockmechanismis

ermetalpanelandtheplywoodlining

orbolts projectthroughtheupperand

s,andacenterlatchengagestheleft-hand

elockhandle.Theoutside,orside

e equippedwithprotrudingweatherseal

ongerubberinsertsset intogroovesin

cornerpostassemblies.Thetopedgeof

edge oftheright-handdoor,areequipped

ealflangeswhichpressagainst thefaces

stripsset intothetopedgeof thedoor

semitrailer,andintoachannelalong

-handdoor.Theinsidefaceofthe

s equippedwithaflush-mountedsponge

hseatsagainsttheangularmetal door

ebodyfloorboardsin linewiththe

fullyclosedposition.

orofthesemitrailerbodyis screwed

echassiswithself-tappingmetalscrews,

wstothewoodend railblockssetbetween

dbodyframe.Removablefrontendsec-

ardsareprovidedto giveaccesstothe

ifthwheelplateandthe floor.Theupper

ethroughtheopeningprovidedbyremoval

anels 22ga

ga

3Ib

.5Ib

ectionsatframedrop20 in.

s11.5Ib

4Ib

f12-in.channel10.6Ib

n.x 40in.x58 in.

th wheelplate38in.


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.38).Thebumperis offull-body

elbracketswhoseupperedgesarewelded

ramesiderails.Theclearspacebetween

fthechassisframeis2 inches.Thebumper

amebracketsbyangular mounting

per,andtothe channelframebrackets.

reboltedtothe frameandtothebumper

orttothe outerends.

movetheboltssecuringthe bumper

ackets,andfromtheanchorplates ofthe

NNEL.Thebumperchannelcanbe

smethodorbyheating.Inspectflangesfor

MPERBRACES.Removedamageddi-

yremovingtheboltssecuringthe anchor

ame.Straightenbentbracebycold-press

ectdiagonalbraceforcracksorother

herdefectiveportionofbrace.Inspect

chorplatestobodyofthediagonalbrace.

ve,rewelddefectivesection.

ctallboltsandnutsofthe bumper

defectiveboltsandnuts.

ethebolts,lockwashers,andnuts

estotheframe.Tightenthe nutsofthese

thebumperbar hasbeenattachedtothe

oftheframe,andtothe anchorplatesof

reallboltsofthe assemblybyfirmly

WheelPlate.

FROMTRACTORTRUCK.Lowerthe

trailer,anddetachthesemitrailerfrom

WHEELPLATE.Removethefront

elofthebody.Removethescrewssecur-


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




rboardsectionsinthefront centerofthe

rtsectionsofflooring.Carefullyinspect

wheelplateadjacenttotheweldsofthe

tionoftheplatefor cracksextendingunder

nd examineallweldedsectionsaround

ngeforfailureofweld.Followinspection

pperfifthwheelplatebya carefulinspection

ate.Noteespeciallythesurfaceofthe

dthesurfacesurroundingthekingpin.

tionofthelowerfaceofthefifth wheel

erthe platehasbeenthoroughlysteam-

dintheplate nearthekingpin,they

ingthe uppersurfaceoftheplate.

hekingpinwitha hammertodetect

earmetallictonein thesound.Ifthetone

weld-failuremaybe thecause.Checkall

perfaceoftheupperfifthwheelplate to

ewelds.Checkthekingpinforexcessive

toleranceplusorminus 0.005

shoulder2.975 in.

rfifthwheelplate3%6in.

estandard2-inchdiameterofthelatch

chesor less,itisadvisableto replacethe

ancepermitsexcessiveplayinthe lock-

l ofthetractortruck,butdoesnot pre-

ingofthe kingpininthefifthwheel.

movedefectivekingpinbysevering

deof thekingpinflange.Thebodyofthe

ugweldstotheupperface oftheupperfifth

riangularsegmentsofthe flangearound

ds.Whenall theplugweldshavebeen

angeofthekingpin,the pinmaybedriven

upperfifthwheelplateand removed.

xercisedincuttingthekingpinflange

theplugweldstopreventexcessheatfrom

gintothemetalsurfaceof thefifthwheel

atecanbest beprotectedbydirectingthe


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flangefromaplanehorizontaltothe

ate.Carefullygrindany metaloftheold

ceofthe upperfifthwheelplate.

tionthenewkingpininthe holein

If theflangeofthepin doesnotfit

eoftheplate,grind offanyexcessmetalof

aceoftheplatethatmaypreventclose

ththe surfaceoftheupperfifthwheel

pininposition,andbuildup theplug

cessiveweldsinopposedholesintheking-

weldshave beencompleted,weldthe

to theplateatseveralpoints aroundthe

tion.Replacethetwofloorboard

ecenterfrontofthesemitrailerfloor.Re-

hemetal crossbolstersofthechassis

odscrewswhichsecuretheforwardends

oodframe membersofthebody.Replace

the centersectionofthebodyfront,and

ithscrews.

ARMS.

toparagraph41.

emblethespringassemblies(par.

parts.Carefullycheckeachpiecefor

brokenordamagedhelperspringclips.

andnutsfor strippedthreadsorother

edboltsornuts.Checkeachspringleaffor

enterboltholes.Replacedamagedspring

avesagainstcorrespondingnewleavesto

veshavelostcamber.Camberofanas-

gleleaf,isdeterminedbyplacinga straight-

aceofthespringwith thestraightedgerest-

Theamountofcamberis determinedby

omthesurfaceoftheleaf atthecenter

straightedgewhichisin contactwiththe

vesarerecambered,theyshouldbetem-

respondingnewleaves.

esurethatallrust hasbeenremoved

vesbeforebeginningtoreassemblethe

eavesintheirproperorder onthespring


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ntbetweenthespringleaves.Assemble

onthespringcenterbolt,progressingfrom

ivelylongerleaves.Usecareto nestthe

ttachedtotheendsofthe fifthandeighth

Theleavesofthe helperspringareas-

onthecenterbolt ofthemainspring.Usea

resstheleavesofthemainand helper

mainspringcenterboltnut canbeapplied

themainspringclipbolts, ferrules,and

ethe helperspringclipsbyreclamping

downuponthefaceofthe mainleaf.

ring6,600Ib

pring1,900Ib

rs46in.

pring4Viin.

spring3%6in.

enterbolt7l/a in.

sembly.Refertoparagraph42b.

mbly.

EANRADIUSARMASSEMBLY.Dis-

ssembly(fig.35).Steam-cleanallparts

erubberbushings.Discarddefectiverub-

onspringseatandeccentricbracket

d,broken,orotherwisedefective.

the eccentricboltandoftheeccentric

strippedthreads.Replaceboltsornuts

hreads.

boltlock-pinfromthefixedeccentric

xaminefor wearordistortion.Replaceif

gedrubberbushingferrules.

herwisedamagedrubberbushings.

cracksor otherdamage.Replace

adiusarms.

mbly.Refertoparagraph42.

Refertoparagraph41f.

ycheckall-weldedorrivetedjoints

ffailure ordamage.Reweldde-

elooseorbrokenrivets.Checkallboltnuts


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Examinethreadsonallboltswhereloose

thethreadson allloosenuts.Replacebolts

fectivethreads.Replacebrokenorde-

ckflangesofframechannels,andrepaira

.Checkallbracketsrivetedtotheframe.

nbrackets.

Ashortjack,alengthof 3/s-inch

areall thetoolsusuallyrequiredfor

emember.Setupthe jackinachaincradle

he pointofthebendwith thejackscrew

tside,or convexside,ofthebend.Screw

ufficientpressureto hold,andapplyheat

y useofthetorch.Graduallytightenthe

temperatureofthebentsectionoftheframe

pletethestraighteningprocesswitha

d chain,resettobringthe pressureof

nttobe bentwhenheated.Kinkswhich

heprocessof straighteningmaybeheated

hilehot.

TA.

the purposeofthelandinggearto

orwardsectionof thesemitrailerwhen

uck.Thecompletelandinggearconsists

dentassemblies.Thesupportingassembly

rleg andwheelandaxleassembly.The

nsistsofahandcrank,acrankshaftextending

egearshaftofthe wormandgearassembly,

ectingthelowerendsofthe landingwheel

andoperatingnutofthewormscrew.The

oweredor retractedbytheforwardor

eguide bracketandnutactuatedbythe

ngmechanism.Theupperendsofthe leg

o,andhingeupon,bracketsattachedtothe

trailerframe.Thehousingoftheoperating

crossmembersofthesemitrailerframemid-

.Thehandcrankof theoperatingmecha-


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




tsideofthe semitraileratapointopposite

atingscrewassembly(fig.45).

ablelegs341%6in.

blelegs201%6in.

gbrackets1Vii n.

geoflegassembly15Vsin.

eextendedwheelassemblywith

ctortruck2in.

ngnuttravelonwormscrew26 in.

hubcap assembly527/ain.

eelsaremalleablecastingshaving

Thewheeldiameteris10inches,andthe

almaintenanceisrequiredotherthan

withtheLubricationOrder(fig.8).A

mustbereplaced.Wheelhubsarenot

ar,sincethetotalturningactionof the

a completeextensionorretractionofthe

essthanone completerevolution.The

eanandfreefromrust.NOTE:Thesemi-

while theweightofthevehicleis resting

sembly.

aftis 1l%6inchesin diameter.Itis

andinggearassemblybyasplit mounting

at thelowerendofeachlowerleg casting.

edtothe axlebybolts,lockwashers,and

EELAXLE.Extendthelandinggear

mitrailerfromthetractortruck.Blockthe

urelyinposition,andretractthelanding

elandingwheelsfromcontactwiththe

lockwashers,andboltssecuringthehub

caps.Removethelandingwheelsfrom

ft.Loosenthenuts ofthefourtensionbolts

e splitmountingboreofeachleg casting.

ountingboreis notreleasedwhenthe

ned,forcesmallwedgesbetweentheex-

ountingboreuntiltheaxleshaft canbe

ull theaxleshaftfromtheleg assembly.

-cleantheaxleshaftandexaminefor

taxle canbestraightenedbythecold

orotherwisedefectiveaxlemustbereplaced.

EELAXLE.Installalandingwheel

procedurefollowedinits removal.


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EASSEMBLY.

chlegofthe landinggearassembly

pperandlower legcasting.Theupper

ordownin thelowercastingtopermit

the legassembly.Arowofholeslocated

he upperlegcastingqanbebroughtinto

owerlegcasting,andthe twolegmembers

thby twoboltsthroughtheopposedholes.

egbracketofthesemitrailerframeby a

alemite fittingforitsproperlubrication.

castingisequippedwithasleeve-type

n alinementbytwocrossbracessecured

fromtheinnerfaceofeachlowerleg

areattachedtothelowerleg castingsbyfour

nuts,andlockwashers.

bracesconnectthelegandlanding

crewoperatingmechanism.Theback

wer endofthelegcastingsand tothe

screwmechanism.

E.Detachthesemitrailerfromthe

thefrontend withthelandinggearfully

dingwheelassemblyuntilthewheelsare

ecotterpinfromthe hingepinwhich

otheguidebracket,andremovethe hinge

andhingepin whichsecureseachback

fa legassembly.Examineeachbracefor

olesandforcracksinthe braceatthe

eisbadlyworninthe hingepinholesor

acethebrace.Thebackbracesaremade

nbe repairedbywelding.Aneworre-

edbyreversingthe procedurefollowedin

SEMBLY.

ecrankconsistsofacrankarm,a

handlebolt.Theshaft endofthecrank

ttachmenteyeandtwoboltslotswhich

tachmentboltin thecrankshaft.When

teyeispulledfromthe endofthecrank-

armslideoutupon thecrankattachment

onthebolt,permittingthecrankto be


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




yofthe semitrailerandhookedupona

omthecrankshaft.Theouterendofthe

hasupportbearinginthe endofthecrank-

herightframeside railtotheshaft coupling

thegearshaftofthe operatingmechanism.

hedtothe crankshaftandtothegearshaft

s,lockwashers,andnuts.

ssembly.Adamagedcrankand

ovedbyremovingthenut,lockwasher,

kshafttothe couplingonthegearshaft

m,andremovingtheoldshaftfromthe

kshaftbracket.Toinstalla newcrank

heendof thecrankshaftthroughthesup-

aftbracket,placethecrankhangeron

heendof thecrankshaftintotheshaft

hafttoalinetheholewith theholesinthe

olt,lockwasher,andnut whichsecuresthe

.

Abentcrankshaftcanberemoved

ld-pressprocess.Inspectallboltsand nuts

mbly.Replaceboltsornuts havingworn

tentheboltswhichsecurethecrankshaft

hesemitrailerframe.Replaceawornor

ket.Replaceabrokenordamagedcrank

NGASSEMBLY.

erGearMechanism.Refertopara-

atingAssembly.Steam-cleanall

atingassembly.Inspecteachpartcare-

ects.Examinethegearandscrewhousing

accident.Repairorreplacedamagedhous-

aringsandreplaceifthey showexcessive

gearsforexcessivewear,crackedorbroken

whichwouldpreventtheirproper function-

efectivebevelgears.Inspecttheoperating

ethreads.Replacedefectiveoperating

nutofthe screwassembly.Replaceif

ve.Inspectkeysandpinsforwearor

fectivekeys.Examineboltswhichsecure

gto thechassisframe.Replaceboltsor

ads.

tingAssembly.Refertoparagraph57.


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ARYSTORAGE

ONS.

cshipmentofthesemitraileris the

ofminoraddedprecautionsaspreparation

eparationforshipmentbyrailincludes

esemitrailer,blockingnecessaryforse-

otherinformationnecessarytoproperly

mesticrailshipment.Formoredetailed

ationforindefinitestorage,referto

MPORARYSTORAGE.

redfor temporarystoragearethose

cebutnotusedfor lessthan30days.If

elystoredaftershipmentby rail,they

storageat theirdestination.

temporarilystored,takethefol-

ecompletely(par.8).

andproperlyinflatealltires, in-

ithserviceabletiresalltiresrequiringre-

otstore rubber-tiredvehiclesonfloors,

whicharesoakedwithoil orgrease.Wash

ease,gasoline,orkerosenewhichcomes

anycircumstances.

rationforlimitedstoragemustin-

ricationservicetocheckonthegeneral

orrectanydefectsnotedinthevehicle

leisstored,ornote onatagattachedto

upling,statingtherepairsneededor de-

ent.Awrittenreportofthese itemsmust

erincharge.

E.Removerustappearingonany part

flintpaper.Repaintpainted surfaces

otectwoodormetal.Coatexposedpolished


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




ARYSTORAGE

etorust,suchaschains,withmediumgrade

l.Closethedoors.Leaverubberfloormats

lledpositionon thefloor,notrolledor

ystematicinspectionjustbeforeship-

etoensureall abovestepshavebeen

cleisreadyfor operationoncall.Make

ageditems,andattachit totheservice

ertoBefore-operationService(par.10).

wheels.

orage.Inspectvehiclesinlimited

ures,evidenceofvandalism,tampering,

KINGFORRAILSHIPMENT.

tothe preparationdescribedinpara-

ehiclesarepreparedfordomesticship-

rationandprecautionsmustbetaken.

esmustbelocatedonthecarin such

carfromcarryinganunbalancedload

abrake-wheelclearanceofatleast6

scontainingordnancevehiclesmust

MP."

ncevehiclesmaybeshippedonflat

rdrop-endgondolacars,whichevertype

.

heneverpossible,loadandunload

ymeansofthe towingvehicle,usingper-

anningplatforms.Movementfromoneflat

gth ofthetrainis madepossiblebycross-

tforms.Ifno permanentendrampis

ampcanbemadefromrailroadties.

gondolacarswithoutdropends byusinga

curingorblockingavehicle,three

wise,andbouncing,mustbeprevented.Two

cleonfreightcars(fig.47) aregivenbelow.

mustbelocatedagainsttheoutsidewheel

TOFVEHICLE)(fig.47).Position

arof andagainstthekingpinsothat cross

hetrailerframe,nail onecleat(2-in.x4-in.

ossbeamagainstthe outsideoftheframe

-pennynails foreachcleat.Toe-nailthe


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




ARYSTORAGE

loor,using40-pennynails.Toe-nailbraces

arfloorwith40-pennynails.

OFVEHICLE)(fig.47).Placeone

choutsidewheelandoneat therearof

ocks(C)required).Nailtheheel ofthe

five40-pennynails,andnailtheportion of

thecarfloorwith two40-pennynails.

outsideofeachwheel(fourcleats(D)

eattothe carfloorwiththree40-penny

eattothe cleatbelowwiththree40-penny

ig.47).Securevehicleinfront(H)

ping,consistingoffourstrands,two

blackannealedwire,passedthroughthe

ear,andsecureat thestakepocketsofthe

rofvehicle(K)bystrapping,passingwire

attachingatthecloseststakepocket.Secure

ngwire throughoppositeopeningsin

atthecloseststakepocketof thecar.Se-

passingwirethroughthespringshackles

cketsofthe car.NOTE:Angularityof

d beapproximately45degrees.

ONTOFVEHICLE).Thefrontof the

easin firstmethod(step(1)above).

AROFVEHICLE)(fig.47).Placeone

ndone acrosstherearofthe wheels.

aslongasthe over-allwidthofthe

cecleats(G) againsttheoutsidefaceof

ks(F).Nailcleats(G)toblocks(F) with

nailsateachend ofcleat(G).Placecleats

othe frontandtwotothe rearofeach

wercleattothe carfloorwiththree

achtopcleatto thecleatbelowwiththree

Strappingisappliedinthesecond

ve.

r-all)336in.

all)95Vzin.

-all)133Viin.

pervehicle222sq ft

cle2,479cuft

e8,000Ib


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ES.'

sindexesshouldbeconsultedfrequently

onsofthe referencesgiveninthissection

elatingtomaterielcoveredin thismanual:

eCatalog(explainingASFCat.

forSupplyIndex(in-ASFCat.

cations(listingFM's,

restto ordnanceperson-

ofSR's,OSSC's,and

abeticallistingofOrd-

blicationspertainingthere-

aining(listing MR's,

TM's,andTR'scon-

mStrips andFilm

andFB'sbyserial num-

inggraphictrain-

anddisplays)FM21-8

LATURELISTS.

lubricationmaterials,

ndmiscellaneousre-

tsSNLN-21

d,15-tongross,2-wheel

G-677

dingmaterials,gases,

ervicecommand,automo-

tSNLN-19

epairofautomotive


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




ATIONS.

s.

10-580

M10-540

alTM38-250

nitsTM10-560

ngTM21-300

0

M1-455

850-15

andpreventivemain-

0

solineAR850-20

ehiclesTM9-2800

r.

icating,andwelding

sissuedbythe

M9-850

ndserviceofcombat

materielOFSB6-11

neumatictiresand

owerbrakesystems

9-1827A

nmaterialsandequip-

redforcevehiclesFM17-59

attackFM21-40

sFM5-25

pmentchart,group

clesAR850-10

gofmechanizedand

nt,alsomajorcaliber

Armyand Navy,

blishedbyOpera-

partmentofAsso-

ads.

quipmentAR850-18


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ANDARDBODYCORP.MODELFT6)

s35

plication68

esent41

d

y

24

24

eakage

oper-

kas-

repair117

nstal-

oval88

t65

ket....66

t(cones,

-

kes115

00


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55

apply39

25

test32

32

semi-

entof

cle.13

ck...12

(landing

ndre-

st37


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tenance

d

g67

nt122

11

ggear)

ent

s)

sem-

mas-

d

ket.102

1

y 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




0

es

mbly

1

ent

2

9

vices30

o.7370 5

nggear)127

15

nstruc-

ncein-

est.. 36

cen-

andin-

7

uring

es.130

yser- 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






2

See

y

Documents

TM-894 SEMITRAILER OMAHA F 16