tm 9-892 semi-trailer 10-ton, 1944

8/22/2019 Tm 9-892 SEMI-TRAILER 10-TON, 1944

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NICALMANUAL

Publ

icDomain,

Google-d

igitized

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athitrust.org/access

_use#pd-g

oogle


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NICALMANUAL

nd

LY

PublicDomain,Google-digitized

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use#pd-google


3/127

pril1944

14-tonGross,2-wheelStakeandPlat-

nConverterDollyispublishedfor the

ofallconcerned.

TARYOFWAR:


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4-5

ddata3-56-11

ecial

NSTRUCTIONS

1213-16

NTENANCEINSTRUCTIONS

-1621-27

e

ntive

42-47

63

0

74

ndtires54-61 74-81

81-86

k,

ains66-7086-89

MAINTENANCEINSTRUCTIONS

eassembly71-7790-94

98

106

r93-96107-112

ings....97-102112-115

06115-116

ndtemporary


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GROSS,2-WHEELSTAKEAND

AND10-TONCONVERTERDOLLY

for theinformationandguidanceof

uipmentisassigned.Thismanualcontains

ndmaintenanceofthe10-tonPayload,

keandPlatformSemitrailer,andonthe

wellasdescriptionsofthe majorunits

onto theothercomponentsofthis

owingarrangement:NOTE:Where

ionsaredifferentfromthoseofthesemi-

this factintheparagraphcoveringthe

entinvolved,andthedifferencescovered

durewhichfollowsthedescription.

tainsdescriptionanddata.Itlists the

edonthevehicle.

tructions,containsinstructionsfor

aileranddolly, withdescriptionandloca-

struments.

ntenanceInstructions,containsin-

erformanceofthescheduledlubrication

nceservices,andinstructionsformainte-

retheresponsibilityoftheusing organiza-

elons).

aintenanceInstructions,containsin-

eofthethird andfourthechelonsof

cemaintenanceinformationontheBendix-

refertoTM9-1827A.

instructionsforshipmentandlimited

a listofreferencesincludingstandard

calmanuals,andotherpublicationsappli-

cableforusein performingprescribed

wwithbriefexplanationsofeach.

26,DRIVER'SREPORTACCIDENT,

N.Onecopyofthisformwillbekeptwith

caseofanaccidentresultingininjury or

filled outbythedriveron thespotorat


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RMNo.48,DRIVER'STRIPTICKETAND

CESERVICERECORD.Thisform,properly

dtothedriverwhen hisvehicleisdispatched

hedriverandtheofficialuserof thevehicle

opriatepartsof thisform.Theseforms

hiclesinconvoyorontacticalmissions.The

ontainsthedriver'sdailyandweeklypre-

vicereminderschedule.

.478,MWOANDMAJORUNIT

TRECORD.Thisformwillbeusedbyall

odificationormajorunitassemblyreplace-

descriptionofworkcompleted,date,

age,andMWOnumberornomenclature

elperformingtheoperationwillinitialin

orrepairs,parts,andaccessoryreplace-

.

6,DUTYROSTER.Thisform,slightly

chedulingandmaintaininga recordof

rations.Itmaybe usedforlubrication

.461,PREVENTIVEMAINTENANCE

LINSPECTIONWORKSHEETFORWHEELED

ES.Thisformwillbeused forall1,000-mile

(semiannual)maintenanceservicesandall

ormedonwheeledorhalf-trackvehicles.

353,SPOT-CHECKINSPECTIONREPORT

S.Thisformmaybeused byallcommand-

epresentativesinmakingspot-checkinspec-

.468,UNSATISFACTORYEQUIPMENT

usedforreportingmanufacturing,design,

aterielwitha viewtoimprovingandcor-

orusein recommendingmodificationsof

be usedforreportingfailures,isolated

nctionsofmaterielresultingfromfairwear

age,norforthe replacement,repair,orthe

nt.It doesnotreplacecurrentlyauthorized

cerecords.

370,EXCHANGEPARTORUNIT

stag,properlyexecuted,maybeusedwhen

temsforlike serviceableassemblies,sub-

es,andtools.


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LATEDDATA

. The10-tonsemitrailer,isatwo-

ehavingdualtires.Avertical-typelanding

frametosupportthe frontofthesemi-

ctedfromthetowingvehicleordolly.The

with thechassis.Therackscanbere-

erintoa platform-typevehicle.The

ptictype.Therearendsofthemain

ckles.Thefrontends aresupportedin

emitrailerhasanopentop,andis provided

sareactuatedby air,andareofthe

Thebrakesarecontrolledbyafootorhand

owingvehicle.Thesemitraileristowed

dwitha fifthwheel.Bothregularand

ed.

edollyis usedtoconvertthesemi-

ailer.Thedollyisequippedwith afifth

yto thesemitrailer.Thedollyisequipped

swivel-typelunetteis providedatthe

orcouplingtoa pintlehookontowing

uippedwithlights orbrakes.Astiff-leg,

stalledatthe frontofthedrawbar.The

yin alevelpositionwhendisconnected

s:

of racks(empty)....8ft8^in.

of racks(loaded)....8ft5%in.

.

earaxle1ft 4in.

ndinggearwheels....1ft2 */2in.

ewithtowingvehicle


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ATEDDATA


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ATEDDATA


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rip (nondirectional)

owingvehicle

ractortruck

uarterLeftRearView

s:

.

xle1ft4 in.


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LATEDDATA

ewithsemitrailerand

rip (nondirectional)

SPECIALTOOLS

forinformationonly.It isnotto be

tion.Therearenotools providedforthe

mentisprovidedonthesemitrailer.

H

mentStowageontheVehicle


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fig.5).

ation

x

x

oolbox

olbox

red tomaintainthesemitrailerand

edbyatractor truckequippedwith

modateallgeneralcareandmaintenance.

toolshavebeenkepttoa minimum.Tools

toredinthe placeorreceptaclesprovided.


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STRUCTIONS

ehand crankforthelandinggear

positiononahookwhichis attachedtothe

tside ofthesemitrailertowardthefront.

fromhookandengagethecrankonthe

andinggearisaccomplishedbyturning

ngisaccomplishedbyturningthecrank

gagecrank,pullthecrankoffthe operating

ardsemitrailerbody,and hangthecrank

he landinggearmakesurethelanding

umtravel,sothatthelanding gearlegs

whentraveling.Whenloweringlanding

weredasfaraspossible;this willeliminate

wingvehicleundersemitrailerwhen

Theblackoutswitchislocatedon

rossmemberdirectlybelowtherubrail.

theswitch.Itis operatedbymeansofa

andiseitherat theblackoutpositionor

on.The faceoftheswitchhasan arrow

sition.Theflowof currentiscontrolled

gs.6and7). Removethedummy

es.Hangthe dummycouplersontheclips

tstakepockets.Coupletheairhosetagged

edtotowingvehicletothecoupleron

ertagged"SERVICE".Coupletheairhose

ichisattachedtothetowmgvehicle,to

GENCY"onleftsideoftowingvehicle.

servicelinecut-outcocksattowingvehicle.

.Closetheserviceandemergency

owingvehicle.Disconnecttheserviceand

ouplingsonsemitrailer.Hangthetwoair

ear ofcabontowingvehicle.Install

mergencyandservicecouplerstoprevent

erenteringthe brakesystem.

7).To connectlightjumpercable,

umpercableinto lightcouplingsocket

ossmember.

kblocksareprovided.Oneislocated

otherontheleft sideofsemitrailerahead


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NGROSS,2-WHEELSTAKEAND

ND10-TONCONVERTERDOLLY


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ttachedtochainsandare hungonhooks

ckblocksareplacedagainsttirewhen

e.

ce.Performtheservicesinparagraph

mitrailer.

TowingVehicle.Placechockblocks

inthe fifthwheelisinthe unlockedposi-

COUPLING

UPLINGIDUMMYHOSECOUPLINGCLIP

S

T

ndJumperCableCoupledtoSemitrailer

wingvehicleunderthe semitrailerso

otrudesbelowtheupperfifthwheelplate

ed,or nearlyso,withthejawson fifth

ontinuebackinguntilthekingpinlocks

ebrakeair hose(par.9c).Couplelight

plybrakeon semitrailer,andtrypulling

ouplingiscomplete,movementofthe

Removethetwochockblocksandhang

Windup thelandinggearuntilstop is

emitrailercombinationisdrivenin

thestraight truck.Whenturningcorners

owfor thefactthatthesemitrailerwheels

cleof thetruck.Thisisbecausethe

d-in-the-middleunit.Whenmakinga


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ection,continueforwardtoapproximately

thencutyourtrucksharplytothe right.

iler,thetruckshouldbesteeredin the

hitis desiredthatthetrailerbe turned.

rbrakesmustbeappliedin coordina-

ebrakes.Thesemitrailerbrakesmustnot

ntirebrakingload.Such abusewillplace

emitrailerand towingvehicle.Thesemi-

edeasilyand releasedwhentheygrab

operatingwithmaximumefficiency.Keep

point.Whenparkingtrailerforan ex-

ethechockblocksagainstthetires.

fromTowingVehicle.Placechock

res.Lowerthelandinggearas faras

mpercable.Uncoupleairlinefromemer-

ngtheemergencylineautomaticallyapplies

osefromtheservicecoupling.Placefifth

ockedposition(fig.9).Movethetowing

disengagethefifthwheelfromthe king

ehicleforward.

si mportanttoloadriding,operating

ailer.Distribute theloadasequallyas

eyondratedcapacity.Withtheloadequally

y47percentoftheloadisat thekingpin

mitraileraxle.

ANDRACKTRAILERINTO

oveonegravitypinfrombottomof

onright andlefttailgate.Removeright

aterack.Markeachofthe remaining

erpanel,also placeacorresponding

derbodyrubrail.NOTE:It isveryim-

arkedprior toremoval,tofacilitatere-

refitting.Removenutandlockwasher

oltsholdingrack stakesinpockets.With

nchtapthecarriagebolts outoftherack

ovescrewsandcarriageboltsfromcorner

weenracks.Withoneman insideoftrailer

pupon rackstakesandliftoutthe racks.

acksaccordingtonumericalmark-

umberplacedontherackscorresponds

dersideofrub rail.Secureracktostake

t,nut,andlockwasher.Securerackcorner

ngscrewsand carriagebolts.Installtail-


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34).Thelandinggearsupportsthe

y isuncoupledfromtowingvehicle.A

ide offirstcrossmember.Thislatchholds

p"position.Whenloweringlandinggearto

onehandholdingthe landinggearleg,

rthelandinggearleg,and lockthelanding

.

perHoseandLightJumperCable

binationbrakejumperhoseandlight

ftwoairhosesand onelightjumpercable.

etherandfastenedto abracketatfront

nsionspringisprovidedtopreventthe

ndchafing.

chendofone airhosecouplingto

gthetwoends ofonehose,thuseliminat-

acethelines,alsopreventsthepossibility

wrong.Whencouplingtheairhose make

thepaintedringsare matchedtothetags

towingvehiclecouplers,servicetoservice,

cy.

unetteeye isusedasa meansof

ntle hookonthetowingvehicle;when

herdollythelunetteeyeis fastenedtothe

pintlehookisfastenedtothe rear

orpullingany lightvehiclewhichis

wbar.The primaryuseofthepintlehook

NOTE:Donot coupleloadeddollyand

othedollypintlehook.Thepintlehook

ingthepintlehookagainstthe lunette

ouplingisaccomplished.Areleaselever

fpintlehook;whenthereleaseleveris

hookopens.

etwo safetychainsarehookedto

hetowingvehicletopreventloss ofthe

ookbecomedisengagedfromthedolly.

eforemovingdolly.Whenonedollyis

ythesafetychainsarefastenedto the

ncouplethedollyfromthesemi-

chuntil stopisreached.Pulltheoperat-

tof thedollyuntilyouhear thelatch

heplunger.Thiswill holdtheplunger


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tilthe kingpiniswithdrawn.Duringthe

he entiremechanismiscockedforre-

onisnecessaryforrecoupling.

ce.Performtheserviceinparagraph

gVehicle.Backthetowingvehicle

ntactsthelunetteeyeatfrontof dolly.

acethe lunetteeyeinpintlehookand

nsafetychainstobull ringatrearof

ylandinggear(par.13a).

ratingControls

ailer.Placechockblockinbackof

ertainthefifthwheelis intheunlocked

kdollyunderthe semitrailersothatthe

elowtheupperfifth wheelplateonthe

nearlyso,withthe jawsonfifthwheelon

guntilthekingpin locksintothefifth

se(par.13b). Couplelightjumpercable

e onthesemitrailerandtrypulling the

complete,movementofthesemitrailer

etwochockblocksandhangthemon

dy.Windupthesemitrailerlandinggear

a).


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emitrailer.Placechockblocksat

erthelandinggearonsemitraileras faras

mpercable(par.13b).Uncoupleair line

.Whenuncouplingtheemergencylinefirst

ythesemitrailerbrakes.Uncoupleair

plingandattachtheemergencyandservice

t fromenteringthejumperhose.Unhook

fthwheellock-leverintheunlockedposi-

gvehiclesharplyforwardto disengage

g pinandmovethetowingvehiclefor-

rforanextendedperiodof time,placethe

restopreventsemitrailerfrommoving.

eair brakestoholdtheparkedsemi-

scapefromthesemitrailerbrakesystem;

se.

owingVehicle.Pulloutonplunger

gearto averticalposition.Makecertain

intheverticalpositiontopreventthe dolly

t thefront.Uncouplesafetychainfrom

ntlehook.Liftthelunetteout ofthe

ngvehicleforward.


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NTENANCEINSTRUCTIONS

g.10)prescribeslubricationmainte-

ad,14-tongross,2-wheelstakeandplat-

g.12)prescribeslubricationmainte-

rdolly.

sontheOrdersarebindingon all

andthereshallbenodeviationsfromthese

edontheOrdersarefor normaloper-

heseintervalsunderextremeconditions

rlowtemperatures,prolongedperiodsof

erationinsandordust, immersioninwater,

nyoneof whichmayquicklydestroythe

ubricantandrequireservicingin orderto

rdamagetothemateriel.

edinthe"Key"in accordancewith

;above+32F,+32Fto0F,andbelow

changegradesoflubricantsby main-

erationofthe vehicleduringtheapproach

dinarilyitwillbenecessarytochange

henairtemperaturesareconsistentlyin

ange,unlessmalfunctioningoccurssooner

thin ortooheavy.

ONINSTRUCTIONS.

Operatelubricatinggunscarefully

nsureaproperdistributionof thelubri-

alvesstickandpreventthe entranceof

nganddeterminecause.Replacebroken

easecups,oilersandoil holesare

vehicle.Wipecleansuchlubricatorsand

eforelubricantisapplied.

provided,applynewlubricantuntil

om thevent.Exceptionsarespecifiedin

elow.

alsurfacesonwhichafilm oflubricant

nualapplication,beforethefilmis


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OWPOINTS

TEPOINTS

OTTED

TICIPATEDAIRTEMPERATURE


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S-CAM

RACKET

lizedLubricationPoints


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OWPOINTS

TEPOINTS/'

OTTED/

S

TEMPERATURE

rposeNo.2 Alltemperatures

onOrder


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KLEPIN

dLubricationPoints


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

Useofgasolineforthis purposeispro-

yallpartsthoroughlybeforeapplying

washed,lubricateafterwashing.

vidualUnitsand Parts(fig.11).

pertaintolubricationandserviceof

Notereferencesinthe Order(fig.10)

whavingthecorrespondingnumber.

movebearingconeassembliesfrom

s,spindle,andinsideofhub,and drythor-

essedair.Inspectbearingracesand replace

eandinside ofhubandhubcap with

,No.2toamaximumthicknessofy16

bricatebearingswithGREASE,general

er,or byhand,kneadinglubricantinto

se extremecaretoprotectthebearings

yreassembleandreplacewheel.Donot

bricantinthebearingis sufficienttopro-

extserviceperiod.Anyexcessmight

drum.Adjustbearingsinaccordancewith

6.

KEANCHORPINS.Whenlubricatingthese

sedinnot over-lubricating.Over-lubricat-

w onbrakeshoesthuscausingfaulty

ttomsideof theS-camwith

.No.2whenwheelsareremovedfor

Donotallowgreasetocomein contact

opreventparticlesofdirtfromentering

efilling,cleanalldirt fromunitandfrom

emovefillerplugandinspectfluidlevel

plug.Ifrefillingis necessary,disconnect

end.

rmupand downseveraltimesto

nit.Addfluidandrepeat pumping.When

operlyfilled,therewill beuniformresist-

ingorlost motion.Refillchambertolevel

ugandconnectshockabsorberlinkat

Units andParts(fig.13).The

aintolubricationandserviceofindividual

encesinOrder(fig. 12)itselfareto the

espondingnumber.

CK-UPANDBASERAMPS.Withdolly

ailercleanallsand,gritandotherforeign


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VEMAINTENANCE

ahandpaddle,coattheentire surfaceof

neralpurposeNo.1above+32F,or

,No.0below32F.

bricatethejawsandlockwithOIL,

2F,OIL,engine,SAE10,+32Fto0F

ervative,special,belowOF,topermiteasy

handle.

VEMAINTENANCE

fficiency,itisnecessarythatthevehicle

edatintervalseachdayitis operated,and

aybediscoveredandcorrectedbeforethey

failure.Certainscheduledmaintenance

atthesedesignatedintervals.Theservices

ethoseperformedbydriverorcrewbefore

on,athalt,afteroperationandweekly.

enanceservicesarelistedontheback

reventiveMaintenanceServiceRecord,

rvehiclesofall typesandmodels.Items

es,butnotlistedonW.D.Form No.48,are

uresundertheitemstowhichtheyare

dontheform,that donotpertaintothe

mtheproceduresaswrittenintothe

onmustthoroughlyschooleachdriverin

nceproceduressetforthinmanualswhether

ificallyonW.D.FormNo.48.

D.FormNo.48,thatapplytothis

hismanualtoprovidespecificprocedures

einspectionsandservices.Theseservices

spectionandconservethetimeof the

arilyinthe samenumericalorderasshown

em numbers,however,areidentical

orm.

ofeachitemappliesalso toanysup-

ction,andgenerallyincludesacheckto

misingood condition,correctlyassembled,

rn.

conditionisusually anexternalvisual

hetherornottheunit isdamagedbeyond

Thetermgoodconditionis explained


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otbentor twisted,notchafedorburned,

bareor frayed,notdentedorcollapsed,

toseethatit iscorrectlyassembled

linspectionto seewhetherornotit isin

tioninthe vehicle.

todetermineifitis secureisusually

ation,ahand-feel,wrench,orapry-bar

aninspectionshouldincludeanybrackets,

ckingwires,orcotterpinsusedin assembly.

understoodtomeanworncloseto, or

s,andlikelytoresultina failureifnot

cheduledinspection.

ctoryoperationcharacteristicsbeyond

elontocorrectmustbereportedatthe

designatedindividualinauthority.

ERVICE.

eisdesignedprimarilyasa checkto

notbeen tamperedwith,orsabotagedsince

ewasperformed.Variouscombatcondi-

hevehiclesunsafeforoperationandi tis

eterminewhetherornotthe vehiclesare

y missiontowhichtheyareassigned.

entirelyomitted,eveninextremetactical

erationServiceconsistsofinspecting

ngtotheproceduredescribed,andcorrect-

ncies.Uponcompletionoftheservice,

promptlytothe designatedindividualin

DDAMAGE.Lookforanyinjuryto

l,itsaccessoriesandequipmentcausedby

ollision,fallingdebris,orshellfire thatmay

eitto fail,whenitisput intooperation.

KANDAIRFILTERS.Examineair

es,airfilters, andconnectionsforloose-

air leaks.Drainwaterfromtanksand

ucktotrailer aircouplingsaresecurely

that theyareclosedandproperly

EFLECTORS.Besurethatallswitches

burn (tacticalsituationpermitting).See

rsaresecureandthatlensesareclean and


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VEMAINTENANCE

ANDHUBCAPSCREWS.Seethatall

ntingstudsand nuts,andhubcapscrews

trailerand dollytiresforflatsor

racticable,alltiresshouldbegagedand

SUSPENSIONS.Checkthetrailerand

erthey haveabnormalsag,brokenor

ssingreboundclips,eyebolts,U-boltsand

sshouldbesecureandnotleaking.Linkage

t.

NECTIONS.Inspectalltowingdevicesto

conditionandsecurelyconnectedor

ttentiontopintledraw-barandretraction

mechanismoperatesproperly,andif

intleissecurelylocked,andthat safety

ened.

ANDTARPAULINS.Inspectbodyfor

eethatropesarelashedsecurely.Inspect

s andseethatloadis evenlydistributed

ailgateisinstalledandfastened.

RATIONCHECK.TheDuring-operation

nas vehicleisputinmotion.

ERVICE.

motion,beonthealert foranyunusual

cks,squealsorhumsthat mayindicate

anyabnormalsag,side sway,ordragthat

pensions,disconnectedtowingorsafety

s.

erationServicesconsistsofobserving

ngtotheproceduresfollowingeachitem,

cationsofserioustrouble.Noticeminor

edorreportedatearliestopportunity,usually

trailerbrakesindependentoftruck

ey areeffectiveandoperatewithout

chatter,orsquealing.

R.Beonthe alertforanyunusual

eratingcharacteristics,oftrailerordolly

ormountings.

Y.Beonthealert forabnormalsag-

egardedasminimumbattlemainte-

rmedunderalltacticalconditionseven


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aintenanceservicemustbeslighted,or

viceconsistsofinvestigatinganyde-

eration,inspectingitemslistedbelow

esfollowingtheitems,andcorrectingany

completionofservices,deficienciesnot

tedpromptlytohigherauthority.

ES;HUBS,BRAKEDRUMS.Placehand

nddollydrumand wheelhubtosee

ot.

SUSPENSIONS.Checktraileranddolly

coils orleaves,damagedorlooseclips,

es,shockabsorberlinkage.

ANDHUBCAPSCREWS.Seethatboth

mountingand hubcapflangenutsand

cure.

edollyandtrailer tiresforunder-

oveforeignobjectsfromtreadsandbetween

ureincreaseduringoperationshouldnot

NECTIONS.Seethatfifthwheelisin

elylocked.Besureelectricalandairbrake

andthatsupportspringsholdlines soasto

AD.Inspectpostclampsforgoodcon-

etrailerload isnotshiftingand issafefor

EANDGLASS.Inspectexteriorofvehicle

Cleanall lightandreflectorglassand

DWEEKLYSERVICE.

ngisparticularlyimportantbecauseat

shis vehiclestodetectanydeficiencies

andcorrectsthoseheis permittedto

romptlytothe designatedindividualin

inspection.Ifthisscheduleisperformed

houldbereadytoroll againonamoment's

tionService,withafewexceptions,isthen

nwhetherthevehiclesareinthe samecon-

ft uponcompletionoftheAfter-operation

onServiceshouldneverbeentirelyomitted

tuations,butmaybereducedto thebare

inedfortheAt-haltService,ifnecessary.

ormingtheAfter-operationServicethe

dconsideranyirregularitiesnoticedduring

eration,During-operation,andAt-halt


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32/127

VEMAINTENANCE

tionServiceconsistsofinspectingand

ms.ThoseitemsoftheAfter-operationthat

*) requireadditionalweeklyservices,the

ndicatedinstep(b) ofeachapplicable

S)ANDREFLECTORS.Cleanallunits,

nessanddamage.Iftacticalsituationper-

witchesto besuretheyoperateproperly

ond.

WIRING.Inspectallwiringconnections

ess,goodinsulation,andsecurity.Make

orrectpositiontoprotectwiringfrom

ectionofallaccessiblewiringfordamage.

trailer tires,includingspares,for

ear.Removeobjectslodgedintreadsand

eenduals.Checkforlowpressures,proper

dpresenceofvalvecaps.Inflateto correct

mum)cold.

ywornorotherwiseunserviceabledolly

letireswhichshowabnormalwearshould

ositions.Apparentmechanicaldefects

bereportedforattentionby higherechelon.

DSUSPENSIONS.

ormalsag,brokenor shiftedleaves,

ndclips,eyebolts,U-boltsor shackles.

forloosenessordamage.

sandreboundclips.Testhangersfor

RAL.Lookforgreaseleaksatwheel

s.Examineshockabsorberbodiesforfluid

NKANDAIRFILTERS.Opentank

condensation),temperatureandsituation

,airniters,andairline connectionsfor

akesurehosecouplingpackingringisnot

velyworn.

NNECTIONS.

towingshacklesforlooseness,damage

minefifthwheelondollyandkingpin on

andsee thatlatchingmechanismoperates

y.

ingdevicemountingandassembly

eelconnectingandlockingmechanism

minepintlehookspringanddrawbar for


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AD.Examinebodycarefullyfordam-

ts.Ifl oadispresent,makesureit isevenly

fefortravel.

ailerexternalassemblyormounting

ectionhasindicatedthenecessity.

yandtrailer wheelrim,mounting,

pscrews;springU-bolts,shacklesand

nections,oranyothermountingorassembly

yinspectionasnecessaryona weeklyor

EASNEEDED(WEEKLYONLY).Lubri-

suchas shackles,hinges,latches,control

clevises,andanypointwhereinspection

ccordingtoLubricationOrderinstruction

ICLE.

ed,cleandirtandtrashfrom inside

onditionspermitting.Whentrailer

ake,caremustbetakento keepwaterout

kes.Whennotconvenienttowashvehicle,

TION:Donotrublusterlesspaintenough

causereflection.

DEQUIPMENT.

andequipmentagainststowagelists,

itemsarepresent.Seethat theyarein

lymountedorstowed.

andequipmentof rust,dirtorex-

servativeswherenecessaryandpossible.See

esare sharpandproperlyprotected,and

yandsecurelymountedorstowed.

NTIVEMAINTENANCE

EVENTIVEMAINTENANCE

ntenanceinspectionsandservicesarea

functionoftheusing arm,andarethere-

rsofoperatingorganizations.


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NTIVEMAINTENANCE

uencyofthepreventivemaintenance

consideredaminimumrequirementfor

es.Underunusualoperatingconditions

tures,dustyorsandyterrain,itmay be

ainmaintenanceservicesmorefrequently.

CIPATION.Thedriversshouldaccom-

sistthemechanicswhileperiodicsecond

enanceservicesareperformed.Ordinarily

hevehiclefor ascheduledpreventive

easonablycleancondition;thatis,itshould

mudorgreasetosuchan extentthat

illbeseriouslyhampered.However,the

edorwipedthoroughlyclean,sincecer-

ascracks,leaksandloose orshiftedparts

dentifthe surfacesareslightlysoiledor

n thosewhicharecontainedinthe

p4,or thespecificproceduresinstep5,

forthecorrectperformanceofapre-

viceorforcorrectionofadeficiency,other

erator'sManualpertainingtotheitem

ndividualinauthority,shouldbe consulted.

S.Thesegeneralproceduresarebasic

efollowedwhenperformingtheservices

pecificprocedures.NOTE:Thesecond

ethoroughlytrainedintheseprocedures

mautomatically.

edsubassembliesareinstalledto correct

betakentoseethattheyare clean,cor-

bricatedandadjusted.

ricantretainerseals,a coatingofthe

overthesealingsurfaceof thelipofthe

aleatherseal,itshould besoakedinSAE

cticable)foratleast30minutes.Then,the

dcarefullybyhand beforeinstallingthe

cratchedormarred.

ofeachitemappliesalso toanysup-

ction,andusuallyincludesachecktosee

odcondition,correctlyassembled,secure,or

chanicsmustbethoroughlytrainedinthe

eseterms.

conditionis usuallyanexternalvisual

hethertheunitisdamagedbeyondsafe

ermgoodconditionisexplainedfurther

or twisted,notchafedorburned,not

eorfrayed,notdentedor collapsed,not


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toseethatit iscorrectlyassembled

linspectionto seewhetheritisin its

ninthevehicle.

todetermineifitis secureisusually

ation,awrench,hand-feel,orapry-bar

aninspectionshouldincludeanybrackets,

ckingwires,orcotterpinsusedin assembly.

understoodtomeanworn,closeto

ts,andlikelytoresult inafailureif not

cheduledinspection.

eareindicatedbyrepeatingtheitem

hichshowtheintervalat whichtheserv-

andshowthatthepartsorassembliesare

oryservices.Forexample,anitemnumber

positeaTightenprocedure,meansthat

eobjectmustbe performed.Thespecial

aryadjustmentsinaccordancewith

eVehicleOperator'sManual,specialbul-

ctives.

vehiclewithdry-cleaningsolventto

dirt,andotherforeignmaterial.Afterthe

emin cleansolventanddrythemthor-

thepartscleanuntil reassembled,andbe

ngsolventawayfromrubberorother

ge.Cleantheprotectivegreasecoating

aterialis notusuallyagoodlubricant.

applieseithertolubricationoperations

vehicleLubricationOrderandtoitemsthat

shouldbeperformedinconnectionwith

ons,ifpartshavetobedisassembledforin-

nsistsofperformingspecialoperations,

rywater,drainingandrefillingunits with

er cartridge.

perationsshouldbeperformedwith

forceonthewrenchhandle)totightenthe

chanicalpractice.Donotovertighten,as

ausedistortion.Tighteningwillalwaysbe

correctinstallationoflockwashers,lock

dedtosecurethe tightening.

itdifficulttoperformthe complete

proceduresatonetime,theycan sometimes

nningtocompleteall operationswithin

ailabletimeat haltsandinbivouacareas

arytoassurethatmaintenanceoperations


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NTIVEMAINTENANCE

tedbythetacticalsituation,itemswith

mnsshouldbegivenfirst consideration.

eventivemaintenanceproceduresthat

oseoutlinedonW.D.A.G.O.FormNo.

veMaintenanceServiceWorkSheetfor

ehicles.Certainitemsonthisworksheet

ehiclearenotincludedin theproceduresin

enumericalsequenceofitemson thework

anualprocedures,butinsomeinstances

ervationofthemechanic'stimeandeffort.

ES.Proceduresforperformingeachitem

y)and 6,000miles(6month)maintenance

nthefollowingchart.Eachpageofthe

s leftedgecorrespondingtothe6,000-

aintenancerespectively.Veryoftenitwill

roceduredoesnot applytobothsched-

ertodeterminewhichproceduretofollow,

espondingtothemaintenancedue,and

appearsperformtheoperationindicated

tuationdoesnotpermita

eitemswhichrequire little

icle.Whena roadtestispos-

erably4andnotover 6miles.

on.PerformtheBefore-

edinparagraph18.

gency(BrakingEffect,

irControl).Testtrailer

fhandcontrolor foottreadle,

veiftheyare effective.Note

or noisethatmightindicate

re,dirtyliningsorscoreddrums.

bleincline,disconnectemer-

rakesautomaticallyhold

onvalvesoperateproperly

pressureor handapplica-

osition.

ents,BodyandWheels).

dtestforanynoise thatmay

attachmentsmountedon

yforindicationsofloose

ilerconnectedandinmotion,

yunusualnoise ondollyand

axles,suspensionunits,or

Testtrailerairbrakesfor

governedmaximum.Withall


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stopped,thereshouldnotbe

rewithinone minute.Ifany

gthischeck,testsystemfor

.

msandHubs).Atcomple-

s andhubsofbothdolly and

temperatures.

NS

afely

msandCaps,Condition,

eCarrier).Inspectboth

llows:

Observeifallvalvestemsare

orrectposition,andifall

installedsecurely.Donot

resforcuts,bruises,breaks,

eddedglass,nails,andstones.

ar,watchingforanysign of

redges,andone-sidedwear.

enterof tread(orotherun-

hangeforneworretreaded

cienciescausingsuchcondi-

dandcorrectedorreported.

hirregular wearshouldbe

Fronttires,wornirregularly,

heelpositions.

resandnon-directionaltires

samevehicle.Directional

dordinarily bemountedso

point downwhenviewed

perlyinflated,inspectthem

daccordingtoover-allcircum-

ewhethersparetirecarrier,

ditionandsecure.

ckringsorflangesshouldbe

re.

elmountingandhubflange

ertiresproperly inflatedto

er-allcircumferenceofall

ecttirestobe mountedon


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NTIVEMAINTENANCE

o theywillnothavedif-

ferenceexceedingthe54-inch

irectivesandbulletins.

elargertireoutside.The

sshouldpoint outandvalve

dpointin, andshouldbe

esmustbematchedproperly

e oftheroadwheelsat inter-

s.Aconvenienttimetodo

enanceservices.CAUTION:

matchingservice,donotre-

bearingservicesarecom-

ports,CamsandShafts).

erviceasfollows:Remove

milemaintenanceseveral

emsupto 52aregroupserv-

nbestorder foreconomyof

bly.

Cleandirtandgreasefrom

ngsolventawayfromlinings.

ortstoseeif theyareingood

tedandifdrumsareexces-

camsandshafts,wherethey

worn;ifcamshaftsoperatefreely

ollarsareworn.

upportcapscrewsandhubto

horsandSprings).Ex-

withoutremovingdrums

toseeifthey aresowornthat

rumswithinnext1,000miles

beenoperatedin deepwater,

eforwardrighttrailer wheel

ngfor damage.Ifthislining

ealltraileranddolly wheels,

viceasnecessary,beingsure

ustallremovedwheelbear-

aph56.

esbyminormethod,ifneces-

els,anddrums removed,in-

yareingoodcondition,tightly

goodwearingcontactwith

cantandnotexcessively

ingoodcondition,properly

s,andretractingsprings,and

ttensiontoreturn shoesprop-


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hicknessofliningat most

ghfor atleast1,000milesof

arelikelyto contactdrums.

reasefromlinings withwire

edair.

trelateditemsto56inclusive

esbyminormethod.Ifnew

,adjustbymajormethod.

aphragmpush-rodtravelis

hesmaximum.

langes,andNuts).Inspect

dtrailerwheelstoseeif they

ecure.

heckforloosenessofwheel

olvewheelsandlistenforevi-

earings.Inspectaround

sforlubricantleaks.

eifflangesareingood condi-

nedsecurely.

dollyandtrailerwheelbear-

oroughlyin dry-cleaningsol-

cupsandconestosee ifthey

chinedsurfacestheycon-

nd ifthereisany excessive

henalloftherelateditems are

earingsare tobereinstalled,

ngtoinstructionsonLubrica-

akecareto haveallparts

ean,anduse cleanlubricant.

, andhubcaporhub flange,

xleshallbewettedonlyto a

mumwithlubricanttoretard

thermachinepackedor

ubricantintoallspacesin

sorouter racesandthelips

antsandinstallnewlubricant

.CAUTION:Donotpackthe

betweenwheelbearingswith

useleakagepasttheseals.

dollyandtrailerwheelbear-

drumassembliesintoplace,

correctly,accordingtopara-

agraph56, fortrailer.


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NTIVEMAINTENANCE

Bolts,Hangers,and

reingood condition,cor-

ure.Springclipsandbolts

eavesshould notbeshifted

.Thismaybe anindication

otewhetherthe deflectionof

dapproximatelythesame.

for excessivewearbymeans

gU-boltssecurelyanduni-

s.Seethatshockabsorber

e,thatthe linkswhichcon-

eareingoodconditionand

no fluidleaks.

rberbodieswithspecified

tthis operationuntilallair

iris full.

servewhethertheyarein

e.Openthedraincocksand

mbers).Inspectframe,

ossmemberstoseethatthey

re,andcorrectlyalined.If

t ofline,reportthecondition

etheseitemsunderneaththe

ingoodcondition,properly

dsecure.

ose).Observebrakelines,

e,underneaththevehicleand

conditionandsecure.

,lubricateallpointsof

ancewithinstructionsin

aphs15and16,usingonly

ngitemsthathavereceived

hisservice.Replacemissing

sorplugs.Keep lubricantcon-

veredexceptwhenwithdrawing

edpassagesorfittingholes

elivered.Wipeoffexcess

tobrakes,rubberparts, soil

hicle'sgoodappearance.


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UND

efifthwheelunitondolly

ditionand correctlyas-

mblyandmountingnuts

ssiblefrictionsurfaces,jawand

onditionandexcessivewear.

iler,cleanbaseplatethor-

eandrelubricateaccordingto

Order,paragraph16.Inspect

forgoodconditionandex-

ndcheckandsafetychains

esurelockingjawsoperate

ssecurely.

bedplateandkingpin latch

allgreaseanddirtand inspect

ear.

pplyafilmofgreaseto fifth

echanismandkingpinandall

LubricationOrder.

ose,WiringandConnec-

orwiringtosee thattheyare

relyfastenedtoclips,springs,

notchafeorinterferewith

nnectingfittingsareingood

excessivelyworn.

lltrailerswitchesandnote

topandblackoutlamps.

seeiftheyarein goodcon-

edandiflensesare dirty.

ttheyareallpresent,in good

re.

kes,Sockets,Tarpaulin,

nts).Seethattheseitemsare

re;thatthe tailgatesare

securely;thatthetarpaulin,

sonthe bodyareallpresent,

re;andwhetheror nottail-

tmentdoorhingesandlatches

.

nethepaintofentire

oodcondition,payingpar-

htspots infinishthatmight

nspectvehiclemarkingsand

Includeidentificationplates.


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NTIVEMAINTENANCE

WheelPlates,Lunette,

whethertheseitemsarein

ssembledandmounted,not

tthekingpinand fifthwheel

.

Shafts,Wheels,Gears,

rein goodcondition,cor-

andadequatelylubricated,

mechanismfunctionscor-

e legs.

pplychassisgreasetoallfit-

ers(figs.10and12).

nggearassemblyandmount-

sstubingandbracesare

heseaxlesaresprungorout

chmentsandmountingsare

ckalltoolstomakecertain

towagelistpars.6 and8),

towed.Makecertainchock

owedintheir properplace,

clemanuals,Lubrication

arepresentand properly

nspecttomakecertain

and properlyfastenedto

grabhooksare notbentor

mpleted).Inspectdollyand

ficationworkordershave

eranyMWO'sorMajorUnit

adeattimeof thisserviceon

8.

alroad testrechecking

nethisroadtesttothe mini-

tomakesatisfactoryobserva-

portalldeficienciesfound


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ubleshootinginformationandtests

determinethe causesofsomeofthe

inuseunder averageconditions.Each

undertheindividualunit orsystemis

blecausesofthetrouble.Thetests neces-

neofthe possiblecausesisresponsiblefor

ftereachpossiblecause.Paragraphs24,

mitraileronly.Paragraph29appliesto the

26,and28 applytoboththesemitrailer

YSHUTOFFATTOWINGVEHICLE.

roftowingvehicle.

WEENTRUCKANDTRAILERNOT

ecertainairjumperhosetagged"Service"

onsemitrailertagged"Service."Serviceline

trailer(par.9 c).

SURE.Checkairpressuregageontow-

notbebelow60 pounds.

CKOPEN.Closedraincockonreser-

ncrossmemberaheadofaxle.

ningHot.

NT.Adjustbrakes(par.38).

KENINDRUM.Replacespring(par.

RPINS,ORCHAMBERRODENDPIN.

ROD.Replacebrakechamber(par.

.Replacedrum(par.60a).

orSlowRelease.

SURE.Checkairsupplyattowing

chnicalmanualorTM9-1827A.

CYLINDERPUSHROD.Adjustbrakes

eanaircleaner(par.36c).


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G.Lookforkinkedordentedtubing.

).

N.Lubricateanchorpin,cams,slack

et,andchamberpushrodpin(par.16).

NRELAYEMERGENCYVALVEEXHAUST

body,replacerelayemergencyvalve(par.

ncyvalve,seeTM9-1827A.

GCONNECTORS.Tightenconnector

isappears(par.37).

ATSERVICELINEOREMERGENCYLINE

kingringinhose coupling.Replacehose

ATSERVICELINECOUPLINGWHEN

ECTED.Dirtyorworninletvalve,replace

par.34b).Repair,seeTM9-1827A.

ATEMERGENCYLINECOUPLINGWHEN

ECTED.Defectivecheckvalvediskorde-

cerelayemergencyvalves(par.34b).Re-

usedfromoverlubricatingofanchor

earing(par.16).Replacelining(par.41 c).

TMENT.Adjustbrakes(par.32).

.Replacedrum(par.60).

especifiedlining.

TOFADJUSTMENT.Adjustwheelbear-

PERLYCONNECTEDFROMTOWING

operly(par.9c).

HEAPPLIEDPOSITIONATTOWING

oupledtotowingvehicleplacethecontrol

semitrailerisdisconnectedfromtowing

reservoir.

ALVEINEMERGENCYPOSITION.Build

clebrakesystem,or opendraincockat

SEDONTOWINGVEHICLE.Opencut-out

GORHOSE.Checkalltubingandhose


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ERBOLTS.Replacespringcenterbolt

RBROKEN.Replaceorrepair(par.

tenU-bolts.

ES.Replacespringleaves(par.78b).

BUTION.Distributeloadevenly.

PRINGHASLOSTITSARCH.Replace

rs.44 and45).

OTFUNCTIONINGPROPERLY.Replace

ORCROSSSHAFT.Replacewithnew

OSSSHAFTCAPS,U-BOLTS,ORSPRING

OSE.Tightenlinkageandmountingbolts.

ES.Replacebrokenleaves(par.78b).

bricateattimeintervalsspecifiedin

).

CKABSORBER.Refill(par.16).

OTOPERATING.Removeandinspectfor

OKEN.Placeleavesinalinementand

).

TrackingwithThoseofDollyor

ENT.Placeaxleinalinement(par.85).

eRapidlyThanOuter Tires.

.Checkaxlecamber(par.84),ifnot

46).

heckaxleforbend(par.83).Replace

eRapidlythanInnerTires.

e.Checkcamber(par.84).Replace


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evenand Cupping.

ENT.Firstcheckaxleforbend(par.

ement(par.85).

eforbend(par.83).Replaceaxle(par.

oTurn.

NORIMPROPERLUBRICANTUSED.

bricationOrder(par.16).

FT.Replaceorstraighten(par.50).

SINGBINDINFRAMEBRACKET.Re-

emovebevelgearcoverfromrightand

pectgears.Replace(par.94a (1)).

ectbevelgearshaft.Operatefirstthe

crank,thenturntheleft-handassembly

minewhichscrewisbent.Replacebent

AssembliesDo NotRespond

ATINGSHAFTORINBEVELGEAR

REDINBEVELGEARSHAFT.Replace

DINSCREW.Replacefeatherkey(par.

eOtherWhen IntheUpPosition.

NT.Adjustlowerleg(par.50).

TIRES.

UTS.Tighten(par.58b).

ELBEARINGSBURNEDOUT.Replace

eforbend(par.83).

N.Lubricate(par.16).

RCUP.Replacebearing(par.55),or

ARINGADJUSTMENT.Adjustwheelbear-

LATION.Inflatetireto80-poundpressure.


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PROPERLOADDISTRIBUTION.Loadto

eloadevenly.

etroubleshooting(par.26).

DrumorOutsideofWheel.

ETAINER.Replaceretainer(par.59).

cehub(par.57).

UBRICATION.Relubricate(par.16).

ayBetweenFifthWheelandSemi-

hejaws(par.90).

FTHWHEELPLATEEXCESSIVELY

(par.106).

NITSMOUNTINGS.Tightenthetwo

s.

NGINJAWS.Attimesdifficultymaybe

pling.Thisisnofaultofthe functionalparts

blelie* inthefactthatthesemitrailer

ngerlocktobind.Thisis causedbythe

asfar apartaspossiblewithoutactually

snecessarytoovercomethetroubleis to

kleverandgive thetowingvehiclea

cingthetowingvehiclein reverseandthen

ejaws(par.90).

UNGERLOCK.Replaceplunger(par.

N.Lubricatejawpins(par.16),and

n plungerlock.

UGGEDINTOTRAILERFROMTOWING

ble(par.9e).

INGVEHICLEINTHE"OFF"POSITION.

VEHICLENOTSUFFICIENTLYCHARGED.

ehicle.

WINGVEHICLE.Checkwiringontow-

DWIRES.Checkwiringsystemforbroken

eorrepair.


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CONTACTBLADESINCOUPLINGSOCKET

theblades.

.

VEHICLENOTSUFFICIENTLYCHARGED.

LAMPSOCKETS.Removelamp-unitand

NotBurn.

IT.Replacelampunit(par.63).

wiresfordamage.Replaceorrepair.

MBLY.Replacelightassembly(par.

LAMPSOCKET.Removelamp-unitand

TA.

areoftheheavy-duty,mechanical,

shoe,anchor-pintype,operatingonthecam

ypecamsareintegralwith thecamshafts.

arings.Theslackadjustersare ofthe

mitrapidandproperadjustmentofthe

edbytwochamberswhicharemounted

e.Emergencybreakawayfeaturesare

elayvalvewhichwillallowair topass

usholdingthe trailerbrakesforalimited

kawayfromthe towingvehicle.The

ootor handcontrolonthetowingvehicle.

xpanding

Ib

yzin.dia

endix-Westinghouse

ackupwheelassemblyuntilwheel

ngaxleassembly,placejackunderaxle

romslipping.


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14).Turnadjustingscrewonslack

wisedirectionuntilwheelcannotbeturned.

ockwisedirection,abouttwonotchesor

ely.Graspthe endofthepushrod and

ingthepush rodintothediaphragm.

mustnotexceed1^4inchesor beless

kechambersaremountedona

tothefrontside oftheaxle.Thefunction

NGBRACKET

ERWASHER

ment

converttheenergyofcompressedairinto

essarytoexpandthebrakeshoesagainstthe

brakes.Air pressurefromtherelayemer-

tatthe top.Theairis heldincheckbya

hepushrodforwardtorotatethe slack

brakecontrolinthe releasedposition.

connectorbody.Pulltheflexibleairhose

ovethecotterpinfromrodendpin atslack

end pin.Removethefourcapscrews,four

holdingbrakechambertomounting

ke chamber.Removeconnectorbody


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positiononmountingbracket.Secure

fourcapscrews,lockwashersandnuts.

eoversurfaceofrodendpin. Couplebrake

usingtherod endpinandinstallcotter

onnectorbodyintobrakechambermaking

xiblehoseendoverendofconnectorbody

.Givebrakesminorbrakeadjustment(par.

ythebrakes.Coverconnectornutwith

overed,tightentheconnectorbodyand

sappears.

er

ALVE(figs.16and17).

mergencyvalveislocatedonrear

berneartherearaxle.Therelay emergency

on tospeeduptheapplicationor release

soprovidesameansofautomatically

ncase thetrailershouldbecomeacci-

thetowingvehicle.Itsfunctionisto oper-

aintainthesameairpressurein thetrailer

edbythecontrolvalveon thetowing

toff theairsupplytotrailer byclosing

owingvehicle.Opendraincockatbottom

llair todrainfromtrailerbrake system.


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E

OCK

ncyValve

bingelbowatthe serviceline.Remove

owat theemergencyline.Disconnectthe

gto thebrakechambers.Removethe

chlinethatrunsto thereservoirtank.

ingrelayemergencyvalvetocrossmember

movethethreeconnectorbodies.Remove

:Whenscrewingoutthetwoelbows,use

adedportiontopreventdamagetothe

tthethreadedportionof allvalve

wthefittingsintotheir properportsin

ecuretherelayemergencyvalvetocross-

ews,twolockwashersandtwonuts.NOTE:

dontop ofrelayemergencyvalve.When

aintheword"top"isup. Couplethetwo

rbodyandtightenbodynut.Coupleservice

mergencylinetoelbowatbottom.Couple


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nchbody.Closedraincockatbottom

twocut-outcocksattowingvehicle.Test

forleaks(par.37 c).

oirislocatedonthe channelcross-

.Reservoirstoresupa surplussupplyof

mergencyvalveandbrakechambers.

cut-outvalvesatrearof towing

tundersideofreservoirandallowair to

tem.Removethenutfromtubing con-

ctorbody.Removedraincockfromunder-

wonuts,twolockwashers,and twocap

ckets.Spreadthefourreservoirmounting

tankout. Removeconnectorbodyand

eadedportionofpipeplug and

ac.Installthepipepluginto oneendof

ectorbodyintothe oppositeendand

sitionbetweenthefourmountingbrackets

ockportisat thebottom.Securetank

singtwocapscrews,twolockwashers

ghtendraincock.Opendraincock.Open

arof towingvehicle.Allowtheairtoblow

econdstopermitall sand,dustorother

haveaccumulatedinthetanktoescape.

kforleaks.Coverdraincock,pipeplug,

ywithsoapywater.Shouldbubblesappear,

bbledisappears.

saremountedaheadofaxlenear

Onecleanerisinstalledin emergencybrake

vicebrakeline.Air cleanersconsistofa

housingand aredesignedtopreventdirt,

atterfromenteringthe relayemergency

quiredtomaintainefficientfunctioning

nermustbedrainedevery1,000miles,dis-

ycleanedevery6,000miles.

18).Close theserviceandthe

satrearoftowingvehicle.Removedrain

eaner.Opencut-outcocksatrearoftow-

blowoutofcleanerforseveralseconds.1

cedrainplugandopencut-outcocks.

wocapscrewsholdingsedimentbowl

upportandpull straineroutofbody.Wash

ventandinstallin body.


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ectionalView

pplyat towingvehicle.Disconnect

o cleanerbody.Removethetwoconnector

apscrewsholdingcleanertomounting

t.

erinpositiononmountingbrackets

butdo nottighten.Installthetwocon-

eaner.Couplethetwoairlinesto the

tenthetwocapscrewsholdingcleanerto

ut-outvalvesatrearoftowingvehicleand

eaksusingsoapywater.Shouldleaks

ctorbodiesandnuts.NOTE:Wheninstall-

portantthatthearrowembossedon the

rdthe airlinewhichrunsto therearof

atrearoftowingvehicle.


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ONNECTIONS.

oflexibleairlines withcouplings

entrailerandtowingvehicle.Twoflexible

nbrakechambersandrelayemergencyvalve.

54-inchdiametertubing,exceptlines

relayemergencyvalve,whichare

ctorSectionalView

sfoundindicatingthatbrakecham-

operly,checkalltubinglines fordents,

Disconnecttubinglinesandblowthrough

thatairpassesthrough thetubing.Replace

ConnectorSectionalView

ebrakesintheappliedposition with

at60 pounds.Coatalltubinglinesand

otest forleaks.Leakageisnotpermissible.

or bodycanbecorrectedbytightening.

eakage,thetubing,tubingfitting,orboth,

aksare foundinthetubing,a newpieceof

anewpieceoftubingsplicedinto the


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0).Closecut-outcocksatrear oftow-

cksatundersideofair reservoirandallow

brakesystem.Removethenutsfromeach

yopenclipsholding tubingtoframeand

pertubingthroughloomandinstall

ngit tofitthetrailer frame.Installtubing

dthenplacesleeveover tubing.Placeend

ctorbody,holdtubingfirmly and

ctorbody,andtightenthe connectornut.

antthatcarebe usedwhenbending

BODY

toConnectorBody

rame.Asharpbendwillkinktubing and

ndrelease.Keepdirtandother foreign

makinga cut,useatubingcutter,nota

ntubing isdetrimentaltofunctionalparts

Whencuttingtubingwithatubecutter,

tubing,a verysmallamountwitheach

etubeis cut.Ifthecutteris fedtoorapidly,

comebeveledinward,reducingtheinside

ecertainalllines areproperlyanchored

ubingclips.Whensmallportionof tubing

ffthedamagedsectionandreplace,using

housetubingunionateachendofreplace-


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ouldbemadeto repairdamaged%-inch

replacewithnewlines.Closedraincock

fcocksatrearoftowingvehicle.Check

esareusedbetweenthe brakecham-

cyvalve.Thehosehas anoutsidediameter

ameterof54inch.Thehose isheldtorelay

kechamberbytwoconnectorassemblies.

Disassembled

rombodyoffittingatboth endsand

of hoseguide.Removeconnectorbody

veandbrakechamberbutdonotremove

pieceofhoseisto beinstalled,useanew

adsonconnectorbodyandnut,making

ondition.Checkhoseforchafing,and

maged,replacewithnewhose discarding

ing,nut,andbodyagain ifnotdamaged.

nut overendofhosewiththe nut

Placesleeveoverendof hose,making


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eveis towardtheendofhose(fig. 21).

elayemergencyvalve.Placegasketover

ectorbodywiththeprotectioncovertoward

he protectioncover.Shovethehoseover

thehoseis downintorecessasfaras it

mblyto connectorbody.

nbrakechamberandproceedas

d.Testfor leakage(par.37c).

ouplingsareusedatthe frontofthe

he emergencylineandtheothertothe

plingsareidenticalinconstruction.

CouplingGasket

tablewrenchturnhosecoupling

ovecouplings.

eadedportionofthepipe ornipple

couplingonnippleor pipeandtighten

22and23).Grasp thedamagedcou-

pliersandtwistgasketout ofcoupling

her foreignmatterfromhosecoupling

tiallycollapsenewgasketwiththefingers


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SectionalView

ketflangeintothegrooveofthe coupling.

n couplingwithabluntscrewdriver.

faceofthegasketis notdistortedor

par.37c).

eslackadjusteractsas abrake

uickand easymethodofadjustingbrakes

ningwear.Theslackadjusteris mounted

attachedtothebrakechamber.When

enters brakechamber.Theslackadjuster


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NG

ernalBrake

thecamshaft,thusexpandingthebrake

erpinfromrodendpinand tapout

screwon slackadjusterclockwiseuntil

earsthe yokeonendofchamberpush

mendofcamshaft,pulloff theretainer

usteroffcamshaft.Pulloffspacerwasher.

acerwasheroverendofcamshaft.Coat

amshaftwitha lightfilmofchassislubri-

teroncamshaft.Whenplacingslack

ecertainthesplineinslackadjuster isin


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INGS

DER| LINING"S"CAM

keAnchorPins

mshaft.Ifslackadjuster isdrivenonto

renot inalinement,theslackadusterwill

etainerwashernexttoslackadjusterand

dslackadjusterto thecamshaftusing

ngscrew ontheslackadjusteruntil the

okeonchamberpushrod.Coatthesur-

hchassislubricant,and installthepin

uster.Install cotterpininrod endpin.

hoesareof theheavy-duty,mechani-

wo-shoetype.Theshoesareoperatedby

eanchorend oftheshoesareequipped

camendof theshoesisprovidedwitha

earplateandthe shoes,shimsareprovided


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keSpringPin

akeadjustment.Theshimsaremadein

h,%2inch,and1/16inch.

iningcan beinspectedforwearand

alpartswithoutremovingthewheeland

mplishedbyremovingthethreecap

ndliftingthe dustshieldoffbrakespider.

bassemblyasoneunit (par.55a).

ckwasherfrombrakeanchorpinlockand

etwo anchorpins.Withabluntend punch

op anchorpin.Shovethetopshoetoward

etop shoeandthetworeleasesprings

t theloweranchorpinandremoveshoe.

7).

ockwashers,andnutsholdinglining

xcessivewearandgrease.Replace


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y.Ifit isnecessarytoinstallnewlining,

ffourlining blocks.

onshoeandsecurewitheightscrews,

acealightcoatof generalpurposegrease

anchorpins.Installthespringpins.Place

nbrakespider.Alinetheholei nbrake

rpin hole.Installtheanchorpin.NOTE:

reinstalledwiththe lubricationfitting

e brakespiderandtheflatside ofanchor

keLining

datetheanchorpinlock.Hookthe two

n onuppershoe.Placetheshoein position

shoetowardthe rearoftrailerso thatthe

estonthecam.Couplethetwo release

lowershoe.Raisethe camendofshoe

ecam.Alineholein shoewithanchor

chorpin(seeprecedingnote).Secure

randmakecertainthat endofanchorpin

rfaceofanchorpins.Coatupperand lower

amwithgeneralpurposegrease.Remove


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BLY

ernalBrakeAssembly

eanallgrease,dust,andother foreign

nstallwheelandhub assemblyasone

kes(par.38).

EMBLY.

oveslackadjuster(par.40b),wheel

a), andtheeightcapscrewsandnuts

eflange.Liftthe assemblyoffaxlespindle

he axlespindlethreads.

ntheinternalbrakeassemblyisin-

The camsaremadeinrightsand lefts.

mon theleftsideof semitrailer.

semblyoveraxlespindleand shovethe

gbracketonaxle.Installthe internalbrake

angeand alineholeinaxleflange with

retheinternal brakeassemblytoaxle

wsandeightnuts. Tightenthecapscrew

kingofbrakespideron axleflangepilot.

arksoneachcapscrewnutto preventthe

stallslackadjuster(par.40 c).Install

par.55b). Adjustbrake(par.32).


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.

nisanassemblyconsistingof spring

rackets,crossshaft,auxiliarysprings,

bersandaxle.Thesemitrailerframeis

the suspensionassemblywiththeauxil-

areboltedtothe framesiderails.The

structionsapplytoboth thesemitrailerand

SHAFTBRACKET

ETS

PRINGSEAT

spension

is oftheeye-type,anchoredatthe

dtocrossshaftat therear.Thespringsare

sandpins.The mainspringconsistsof16

and6clips.The auxiliaryspringconsistsof

t overthetopleafto eliminateclipspacers

ingandthe matnspringareboltedtothe

ts.Thesemitrailermainand auxiliary

blewithtowingvehiclesprings.Thedolly

ablewiththesemitrailermainspring.

mlesssteeltubularconstructionwith

ringseats andshockabsorberbracketsare

eis camberedtopreventunevenwearof


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xlecanbe usedasadolly axle.Thedolly

semitraileraxle.

ble-actingshockabsorbers.controlthe

hockabsorbermechanismisboltedto the

inksareattachedtothe axleattherear

areinterchangeablewiththerearshock

le.Thedollyisnot providedwithshock

echainhoisttorear crossmember,

andjackup thetrailerframeuntilthe

hesprings.Whenremovingspringswith

ertaintheblockandjacksareplacedwhere

(par.47 a(1)).RemovefourU-boltnuts

U-boltsup,using carenottodamagethe

entheU-boltseat andtheU-boltsandpry

ng seat.LiftU-boltseatoffauxiliary

ng offspringshroud.Removeonebolt

cklepinanddrive thepinoutof shackle.

ontspringhangerbracketandpin,and

springshackletowardrearofsemitrailer

fthemainspringseat.Removeauxiliary

springs arebeinginstalled,before

inserta springintoeacheyeandplacea

opof thepins.Measurethedistanceatthe

ottomof springtodeterminethearch.

greatestamountofarchontheright side

onmainspringseatwiththe spring

re.Makecertainthespringcenterboltis

ain springseat.Alinespringeyewithhole

ketby placingbarbetweenthetireand

wheelinthedirectiondesired.

ingfromspringpin.Coatthe surface

purposegrease.Placethepinintospring

edownand inalinementwiththepinch

ger.Placeablockofwoodoverspring pin

tion.CAUTION:Donotstrikespringpin

reofa hardenedsteelandchipsmayfly

hboltwiththe headtowardfrontof

fitting.

rspringeye. Alineshacklewithspring

he hoistingfacilities.Removelubricating

tthe surfaceofspringpinwithgeneral

ntoshacklewiththecapscrewgrooveup

crewholein shackle.Placeablockof

rive thespringpininto shackle.Install


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AND.10-TONCONVERTERDOLLY

ardfrontofvehicle.Installlockwasher

ermainspring. Placeauxiliaryspring

akingcertainthespring centerboltis

shroud.PlaceU-boltseatonauxiliary

hespringcenterbolts.InstallU-bolts.

sand tightenusingawrenchwith36-

OTE:WhentighteningU-boltnutsalter-

o bringtheauxiliaryspringdownevenly

ningthesame distancebetweentheauxiliary

ingbrackets.Makecertainauxiliary

hmainspring.

olts,nuts,andlockwashers.Tapupon

out. LifttheU-boltseatoffauxiliary

yspringand liftthespringout towards

aryspringinpositionon spring

springcenterboltis seatedinrecessin

ltseatoverauxiliaryspringmakingcertain

tseatatundersideis overthespringcenter

ashers,andnuts.Tightennutsusing a

mumleverage,seenoteinparagraph44.

elandhubassemblyasoneunitfrom

a). Removethetwoconnectornutsfrom

ebrakechamberandpull theflexiblehose

uplechainhoisttorear crossmemberoruse

osupporttheframe.Removeinternalbrake

sofaxle(par.42). Markan"R"onthe

y,andan"L"ontheleft-handbrake.Re-

kwashersfrom thefourstudsholding

brackettoaxleandliftoffthe brake

acketasanassembly.Repeatthesame

untingbracketonoppositeside.Removethe

bracketstudsusingapipewrench.Pull

rberarm,removenutandpull thearm

ket.Placenutbackontheshockabsorber

nganddustcollars.Removeshockabsorber

samemanner.Placehubbearingadjusting

ventthreadsfrombecomingdamaged.

eraxle.Removetheeightnutsand lock

ertheaxletogroundand removeaxle.Re-

nggreaseretainerassemblytoaxleand

oppositesidein thesamemanner.


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springassembly.Placeaxleinposi-

emakingcertaintheshockabsorber

erearof thevehicle.Raisetheaxleup

mainspring.Makecertain thespring

trudesbelowthemainspring isrestingin

gchair.PlaceU-boltsinpositionover the

helockwashersandU-boltnuts and

h36-inchminimumleverage.Installthe8

etstudsusingapipewrench.Securecham-

brakechamberassemblytostudsusing

s.Installthebrakeassemblymarkedwith

stallbrakeassemblymarkedwithan"L"

Securethe2 greaseretainerassembliesto

s.Installwheel andhubassembly(par.55

osesinconnectorbodyatbrakechamber

ngconnectornut.Removenutfromshock

earm intobracketontheaxle.Install and

n.Removeblocking,jacksandhoist.

nnectorforleaks(par 37c).Adjustbrakes

pliedpositionandchecktherelease.

pidlythemountingbracketiscausingthe

henutsonthe mountingbracketstuds

ketfirstto therightandthento theleft,

tisin perfectalinement.Tightenstudnuts.

nderrearcrossmembertoaccommo-

cksonblockingdirectlyunderrivetheads

thsides.Jackthe trailerframemaking

ivetheadtopreventslippage.

asherfromcapscrewin shackles.

wsusing ahammerandlongtapereddrift.

ndspringeye.Ifdifficultyisencountered

ns, raiseorlowerthejacksto relievethe

capscrewsfromthetwo crossshaft

driverintoslotin thestudcollarsandturn

tilremoved.Tapshackletowardrearof

esoffthe crossshaft.

ourlock washersfromtheunderside

halong tapered^-inchdrift.Driveoutthe

ntaperedchisel intoslotonundersideof

tstoreleasebind. Tapoutthecrossshaft

he threads.


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erAdjustment

neralpurposegreaseNo.1overthe

shaft.Placecrossshaft intocrossshaft

certainthefourcapscrewslotsarein the

crossshaftthroughthetwomounting

wslotsare inalinementwiththeholesin

tmountingbrackets.Drive%mcnlong

gbrackettoassistin properlyaliningthe

thecapscrewholes.If difficultyisen-


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othedesired positionusingapipewrench.

lockwashers,andnuts.

endofcross shaftwiththecapscrew

Turn shackledownoverspringeye.Raise

oleinshacklewithspring eye.Installthe

oveinpin isfacingup.Installthe twocap

nuts.Installthetwocrossshaftcaps and

cross shafttootightastight crossshaft

mentoftheshackles.Installcap screwin

ovejacksandblocking.Lubricateshackles

erandConnectingLinks

orbercontrolsthereboundactionof

orbermechanismisboltedtoa mounting

meand theconnectinglinksareattached

ksareprovidedwithlubricationfittings.

eadjustedat thefactorytomeet

anditisrecommendedthatthefactory

ustmentcanbemade,however,tomeet

ns.

shaftat thesideofthe housing

sistanceofthe shockabsorber,theindi-


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Theindicatorshouldnotbeturnedmore

lsatisfactorycontrolisobtained.Donot

op.

foreignmatterfromunitto prevent

ngthe mechanism.Removefillerplug,

hmustbe atlevelofplug.Refillif

end.Pumparm upanddownseveral

dintheunit.Addfluid (par.15)andrepeat

ngchamberisproperlyfilled,therewillbe

rubberyfeelingorlost motion.Refill

ug,and installfillerplug.Connectshock

ovecotterpinandnutfrom shock

sing copperhammer,taptaperedball

Removesealwasherandspring from

etwonutsandlockwashersfromtwo cap

emountingbracket.

kabsorberinpositiononframemount-

ocapscrews,twolockwashers,andtwo

washeron connectinglinkballstud.Drive

-boltseatarm.Installnutand cotterpin.

isbolted toeachsideofthe semi-

s atthedrop.Thelandinggear islowered

ingvehicleordolly fromthesemitrailer.

chedtotheoperatingshaft ontheright

e operatingshaftwhichmeshwithgears

husloweringorraisingthe landinggear

dedatthe endofeachlegandthe wheels

etruckis heldtotheleg byapinwhich

ein ahorizontaldirectiontoaccommodate

s.

ofastiffleg fold-backtype.The

edolly inalevelpositionwhen thedolly

emitrailer.


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ACKETRIGHTHANDFRAMEBRACKET

FTTUBING

mitrailerLandingGearAssembly

ANDLANDINGGEAR

tremoveanypart ofthelandinggear

itraileriscoupledtodolly ortowingvehicle,

ont topreventthesemitrailerfromfalling

nutfromcrankandoperatingshaft.

shaft.Removecrankholder.

wsandthreelockwashersfromcrank

etoffcrankshaft.

s,nutsandlockwashersfromcrank


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nkshaftandcrankshaftcouplingoff

protrudesfromthe framebracket.

andlockwasherfromcrossshaft

w,nutandlockwasherfrombackbrace.

dlockwasherfrombevelgearshafttubing.

,nutsandlockwashersholdingthelanding

emovetheassembly.

ositionon theframe.Installcross

housing.Placeshafttubing overbevelgear

tosocketonhousing.Alineholesin frame

trailerframe.Installthe eightcapscrews,

tightenthe nuts.Installcapscrew,nut

ingshafttubingand backbrace.

gthree capscrewsandthreelock

tthroughthecrankbracket.Couplecrank

ng coupling,twocapscrews,twolock

cecrankholderovercrankshaftwith the

hicle.

ngshaftusingcapscrewand nut.Do

htcapscrewwillpreventfree movementof

ft.Placetwopunchmarkson nuttopre-

rleg onlandinggearatthe opposite

hof bothlegsareidentical.Alineholein

n shafttubing.Secureshafttubingtobevel

,lockwasherandnut.

ANDLANDINGGEAR

tofsemitrailer(par.50a). Remove

sherfromcrossshafttubing. Removecap

rfrombackbracket.Removecapscrew,

hafttubing.Removeeightcapscrewnuts

heleft-handlandinggearassemblyto

assemblyout.

rleg(par.50).Placethe assembly

iptheoperatingshaftintooperatingshaft

blytoframeusingsix capscrews,sixlock

lein operatingshafttubingwithholein

thecrankon therightsideassemblyand

her,andnut.

NDWHEELASSEMBLY.

andlockwashersfromcapscrewsthat

.Removecapscrewsandaxlecaps.Pull

movecotterpin,nut,capscrew,andtwo


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EDVIEW

Gear


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n.Drivetruckpin outofwheeltruckand

film ofgeneralpurposegreaseNo.1

acetruckinposition onlowerleg.Aline

intruck.Installtruckpin. Securetruck

nwashers,capscrew,nutandcotterpin.

osegrease No.1overspindles'ontruck.

dles.Securewheelstotruckusing axle

her,andnut.

R.

elunetteeyetopintle hookontowing

rseunderA-frameof dollydrawbar.Re-

lainwasherfrommachinebolt holding

rackets.Drivemachineboltoutof mount-

helandinggear.

dinggearinpositionbetweenthetwo

wbarA-frame.Pushthemachinebolt

cketsandtheeyein endoflandinggear.

ountingbracketsusingplainwasher,nut,

ANDTIRES

BULATEDDATA.

sareoftheventilatedpressed-steel

edtothe hubbyaseparateset ofnuts.

elsontherightside haveright-handthreads,

ndividuallyheld tothehubby innercap

over theinnercapnutsandis independ-

nuts.Thewheelsandtireson thedolly

e semitrailer.Thehubassemblyis

esontapered rollerbearings.Thedrums

endofwheelstudsonthe semitrailer.The

equippedwithdrums,however,acollar

heelstudstotakeupthe spacebetweenface

reofpneumatictiresreferto TM


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ANDTIRES

eelandHubAssembly


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EMBLY.

apon sidetoberemoved.Block

trailerfrommoving.Placebrakesinthe

ckuntiltiresclearthe ground.Placea

erthe dualwheelstoserveasa skid.

ctgreasedskid.

sandlockwashersfromhubcap.

apgasket.Withaxlenut wrenchturn

eandremovejamnutfromaxlespindle.

ver,pulllockingwasheroffaxlespindle

nterclockwise.Removetheadjustingnut.

assemblyoffaxlespindle.Outer

pindlewithhub.Guardagainstpermitting

wheeland hubassemblydoesnotslideoff

mountofeffort,decreasethediameterof

ustingscrewonslackadjuster clockwise.

e.NOTE:Wrapbearingsin aclothto

gincontactwithsandandother foreign

earingcupsfor chips,pitsandexces-

makecertaintheyaretight inhubbore.

rforexcessivewearorover-saturation.

par.59a).Lubricatebearings(par.16).

le spindle.Placegreasedskidon

Rollwheelontogreasedskid andadjust

withaxlespindle.Shovethewheeland

e.Installouter bearingandadjustingnut.

djustingnutisinstalledwiththedowel

6b). Installlockingwasherandjam

bcap gaskettohubusingsix capscrews

oveskidplate,jackandblocking.

djustment.Jackaxleuntiltire

seshakeofwheelwithhandsor witha

arecorrectlyadjusted,shakeofwheelwill

eelwillturn freelywithnodrag.Ifbearing

aringswillbecomeover-heated.Tooloose


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ANDTIRES

unding.Brakesmustbeinfullyreleased

ntilwheelclearsthegroundand

ainitturns freely.Removesixcapscrews

hubcap,and removehubcapandhub

wrenchturnjam nutcounterclockwiseand

ngwasheroffaxlespindle.Tightenadjust-

nchuntilwheelbindsandatthe sametime

ainallsurfacesarein contact.Thenback

rn, ormore,ifnecessary,makingsure

khubbearingforendplay(par. 56a).

bandDrumAssembly

kingcertainholeinlockingwasherfitsinto

talljamnut andtighten.Securehubcap

usingsixcapscrewsandlockwashers.

MBLY.

oveinnerandouterwheelandtire

ovejamnut(par.55). Graspthehuband

twohandsandpull hubanddrumassem-

ot toallowouterbearingtofall indirt.Do

ethreadedportiononaxlespindle.


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ANDTIRES

elonHub

pectbearingsandbearingcups for

wear.Checkcupstomakecertaintheyare

feltgreaseretainerforexcessivewearor

placementifnecessary(par.59a). Lubri-

ceonebearingonspindle. Adjustbearings

ndouterwheelandtireassembly(par.

EMBLY.

dofwheelwrenchloosenthe 10outer

Blockthewheelonoppositesideandjack


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AND1O-TONCONVERTERDOLLY

earstheground.Continueremovingouter

eelandtireassemblyoffhub.Removeten

ofwheelwrenchandliftinnerwheel and

ds.

wheelandtireassemblyoverwheel

tohubusing teninnernuts.NOTE:Both

nuts aremarkedwiththeletter"L"or

ght-handthreads.Makecertainnutswith

thehubonthe rightsideofvehicle,and

usedontheleftside ofvehicle.Tighten

oldwheelfirmlyin position.Successively

eventcockingofwheelon hubpilotand

heelandcontinuetightening.

rinnernuts withvalvestemlocated

innerwheel.This willprovideample

stall outernutsmakingcertaincon-

ctswheel.Successivelytightenopposite

wheelonhub pilotandinnernuts.Place

tinuetightening.Removeblockingand

ovehubandwheelassemblyasone

rewsholdingretainerassemblyto axle

erfromaxleassembly,andpullfeltoffaxle

veraxlespindle.Placeretainerover

nerwiththose inthehubseal retainer

stallwheelandhub assembly(par.55b).

elandhubassemblyasoneunit(par.

inggrease slingeranddrumtohub.Lift

m.

tand otherforeignmatterfrom

dhubassemblyat abouta70-degreeangle.

cegreaseslingeroverstuds.Install nuts

entdrumfromcockingondrum pilot.

nutandstud topreventnutsfromcoming

assembly(57 b).

ndwheelassembly(par.58a)and

vecoreallowingallair toescapefrominner

M31-200.


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ANDTIRES

1-200.Installvalvecore.Turntire

down,andinflate to80-poundpressure.

tetirewithflangefacingup.Theflange

usinjury.

ndwheel assembly(par.58b).

BULATEDDATA.

caldiagram(fig.39)illustratesallof

onthisvehicle.Allelectricalunits are

tion.Theelectricalsystemconsistsofone

ndblackouttaillight,onecombination

stoplight,oneblackoutswitch,coupling

andthreewiringharnesses.Theflowof

ight switchofthetowingvehicle.

ailQMC-08242-X

stopQMC-08243-X

671-W

nationblackouttailandblackoutstop

tsidenearrearcrossmember.Thecombina-

ndblackouttaillightislocatedonthel eft

er.Theblackoutdesignofbothlights is

s followingaprecedingtrailerataspeci-

beamswillmergeinto asinglehighly

accuracyofconstructionnecessaryto

mpsaresolderedto theretainerandthe

o theretainertoforma completeunit.

outitisnecessaryto replacethecomplete

alandinstallationprocedureforbothlights

nit.

oscrewsfromlightdoor andremove

eamunitsoutof lightshell.

sealed-beamunitsintheirproperposi-

edoorinposition.Securedoorto lightshell


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ND1O-TONCONVERTERDOLLY


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TCOVER.

TLAMPUNIT

Y^

TLAMPUNIT F

BlackoutTailandBlackoutStopLight

TCOVER

IL

Y

ServiceJailandStopandBlackoutTail

twoleadsfromfrontside ofbody.

ockwashers.Removelightassembly.

ghtassemblyintomountingbracket.

ountingbracketusingtwo lockwashers

utswitchislocatedon therightside

Theflowofcurrent issuppliedfromthe


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olledfortheblackoutlightsbythe blackout

escrews,threenuts,andthreelock

ckofswitch.Removesixwiresfromthesix

switchbody.Removenutfromfront side

out.

wireintoholeat sideofswitchbody

sinstalledinthehole ofswitchbody.

per terminal.Eachwireisofa different

alismarked(fig.42).Placethe threaded

GREEN

ackoutSwitchwithCoverRemoved

ntohole infrontcrossmember.Fasten

berusingnut.Installcoverplate.Secure

usingthreescrews,threelockwashersand

KET.

ngsocketislocatedinthecenterof

hejumpercableispluggedintothe coupling

distributedtothevariouselectricalunits.


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AND1O-TONCONVERTERDOLLY

Aholeisprovidedin thesemitrailerupper

mpleroom formaintenanceservice.

upledollyortowingvehiclefrom

4d).Reachthroughholeatundersideof

ovenutand lockwasherfromcap.Pullcap

wingpartsofthethreeterminalswhich

utsandcuppedwasher.Removethethree

sandlockwashersholdingcoverand

ytofrontcrossmember.Removecoupling

ingthroughholeincenteroffront

mpercablealinementslotdown.Installtwo

holesin caseflange.Placecoverinposition

aseflange.Installtwoscrewsincoverand

semblytotrailerframeusingfour lock

cewireonterminals.NOTE:Each

aillight,"SL"stoplight,"GR"-ground,

nalmarked"BR"isnotused(fig.41).

vereachterminal.Securewiretoterminals

OK,LUNETTEEYE,

eelis ofasemiautomatic,two-jaw

eentiresurfaceofthe kingpinwhenthe

mitrailer.Whentheoperatinghandleis

psin behindthelungonthe plunger.This

nlatchedpositionuntilthedollyiswith-

tiontheentiremechanismiscockedfor

lmountedonthedollyis interchangeable

nthetowingvehicle.

ookis mountedont

tm 9-892 semi-trailer 10-ton, 1944

Documents