tm 9-892 semi-trailer 10-ton, 1944
TRANSCRIPT
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NICALMANUAL
Publ
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NICALMANUAL
nd
LY
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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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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ATEDDATA
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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
OWPOINTS
TEPOINTS
OTTED
TICIPATEDAIRTEMPERATURE
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S-CAM
RACKET
lizedLubricationPoints
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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
OWPOINTS
TEPOINTS/'
OTTED/
S
TEMPERATURE
rposeNo.2 Alltemperatures
onOrder
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KLEPIN
dLubricationPoints
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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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NGROSS,2-WHEELSTAKEAND
ND10-TONCONVERTERDOLLY
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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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
.
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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GROSS,2-WHEELSTAKEAND
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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NGROSS,2-WHEELSTAKEAND
ND10-TONCONVERTERDOLLY
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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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GROSS,2-WHEELSTAKEAND
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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NGROSS,2-WHEELSTAKEAND
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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GROSS,2-WHEELSTAKEAND
AND10-TONCONVERTERDOLLY
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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GROSS,2-WHEELSTAKEAND
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