tm 9-793 m23 ammunition trailer

7/28/2019 Tm 9-793 M23 AMMUNITION TRAILER

1/211

NICALMANUAL

Publ

icDomain,Google-digitized

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athitrust.org/access_

use#pd-google


2/211

NICALMANUAL

UGUST1944

TONOFRESTRICTEDMATTER

dinrestricteddocumentsandtheessentialchar-

aterialmaybegiventoany personknowntobein

atesand topersonsofundoubtedloyaltyand

atinginGovernmentwork,butwillnotbe com-

to thepressexceptbyauthorizedmilitarypublic

soparagraph23i,AR380-5,15March1944.)

PublicDomain,Google-digitized

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21-2

3-11

ecial

NSTRUCTIONS

ercontrolsand

and

8

TIONALMAINTENANCE

7-1849-57

ve

-2357-65

ntive

77- 83

d

embly...40-4394-104

5105-126

baxle..56-65126-135

9135-139

gs70-71139-147


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47-149

5-78149-151

1-152

88152-160

berMS92-100161-176

MAINTENANCEINSTRUCTIONS

ster101-105177-179

06-109179-182

ms110-114182-185

ndwalking

123188-191

6192-196

dsocket127-129196-199

201

203

mberMS136-138204-205

nandlimitedstorage139-141206-209

4210-212


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7/211

23(8-TON,4-WHEEL)

eofanaccidentresultingininjury or

filled outbythedriveron thespot,oras

eafter.

RMNo.48DRIVER'STRIPTICKETAND

CESERVICERECORD.Thisformproperlyex-

othedriver whenhisvehicleisdispatched

Thedriverandtheofficialuserof the

etail,appropriatepartsofthis form.These

or vehiclesinconvoyorontacticalmissions.

rmcontainsthedriver'sdailyandweekly

servicereminderschedule.

.478,MWOANDMAJORUNIT

TRECORD.Thisformwillbeusedbyall

odificationormajorunitassemblyreplace-

descriptionofworkcompleted,date,vehicle

dMWOnumberornomenclatureofunit

ormingtheoperationwillinitialinthecol-

rs,parts,andaccessoryreplacementswill

.6,DUTYROSTER.Thisform,slightly

chedulingandmaintaininga recordof

rations.Itmaybe usedforlubricationrec-

.461,PREVENTIVEMAINTENANCE

LINSPECTIONWORKSHEETFORWHEELED

ES.Thisformwillbeused forall1,000-mile

(semiannual)maintenanceservicesand

erformedonwheeledorhalf-trackvehicles.

.7353,SPOT-CHECKINSPECTIONRE-

EHICLES.Thisformmaybeusedby allcom-

affrepresentativesinmakingspot-check

.

.468,UNSATISFACTORYEQUIPMENT

usedforreportingmanufacturing,design,

aterielwitha viewtoimprovingandcor-

orusein recommendingmodificationsof

be usedforreportingfailures,isolated

nctionsofmaterielresultingfromfairwear

age,norforthe replacement,repair,or

pment.Itdoesnotreplacecurrently

performancerecords.

370,EXCHANGEPARTORUNITIDEN-

properlyexecuted,maybeusedwhenex-

emsforlikeserviceableassemblies,subassem-

ools.


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8/211

3(figs.1,2,and 3).TheAmmunition

eledvehicledesignedtotransportacargoof

roundsof8-inchor32 roundsof240-mm

plydumpstothepoint ofuse.Itcanbe

geLimberMSsupportingthe frontofthe

rectlyattachedtothe7V2-tonprimemover

thelimber,canbedrawnasa tandem

nitiontrailer.Ineithercase,6,000pounds

bythesupportingvehicle.

ilerbodyandframeareintegral;the

refabricatedbyweldingsteelplatesofvary-

sintoaunit. Thefloorplate,stampedto

munitionwhichcanbecarried,isweldedto

bers.Asecondplate,oflightermaterial,is

f thefloorsupportingmemberstoprotect

omdirt,flyingsand,or gravel.Adjustable

atedtofitsnuglyover theupperendsof

msecurelywhilebeingtransported(fig.4).

nged,at therearofthebody,permit floor

leyhoist (fig.40)isprovidedwitheach

ration.Acompartmentisprovided,inthe

carrythehoistpoleand boomassemblies

d trolleyarecarriedina compartment

hebody(fig. 12).Apintlehook,boltedto

er,isusedto towasecondlimbermounted

x(fig.10),atthe frontofthebodyproper,

ses,primersandsomeofthe on-vehicle

.Thegreaterpartofthetrailergross

iellipticrearspringswhicharemountedon

endsof theupperspringleafactas wear

rectlyfromshacklesweldedto thetrailer

esuspensionconsistsofacentercrossaxle

a fullyrotativewalkingbeamframe.A

hewalkingbeamsupportsawheelandbrake

esuspensionismaintainedbymeansof

MS(figs.7and 8).TheHeavyCar-

wheeledunitusedtotowtheammunition

rtionofthegrossload.It iscomposedof

ingbracketassemblies(figs.7 and8).The


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23(8-TON,4-WHEEL)


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ailerM23 TopViewMinusTarpaulin

meatthefrontof whichismounteda

7).Therearof thedrawbarendsin

hichenclosethematingbearingsurfacesof

axleends mountrollerbearinghubscar-

hangewiththoseonthetrailer.

s carriedonarockerpinwhichis

dby,thebracketspindle.Theupperand

hespindleturn inbronzebushings,mounted

raxle.


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23(8-TON,4-WHEEL)


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23(8-TON,4-WHEEL)

eLimberM5 FrontView

LimberM5Three-quarterRightRearView


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3.

t11 in.

40Vie in.

cft

ft4]%6in.

ed)10,710Ib

,710Ib

(vehicleloaded)6,000Ib

earcrossmember(loaded)ISV2in.

earaxle1ft 6in.

tes

M5.

ocenterofyokeblockpin) 6ft2in.

n.

t 11%in.

racketspindle(loaded)12%in.


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23(8-TON,4-WHEEL)

SPECIALTOOLS

reforinformationonly.Theyare not

quisition.

ut

bearingnut

ut

nch

wide

ENCH

ENCHHANDLE

E

ls


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SPECIALTOOLS

uipment

ebox

per,12ftFusebox


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23(8-TON,4-WHEEL)

tment

QCKPIN

omponents


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SPECIALTOOLS

ation

RS,airbrakeFusebox

oistcompartment

ODASSY.,Boomandpolecorn-

polecom-

shedto performthemaintenanceop-

seofcertaintoolshas beenillustrated

dorfor thereasonthattheoperationcan

hedthroughtheiruse.These,orsimilar,

oolsetslistedin SNLG-27,orcaneasily


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23(8-TON,4-WHEEL)

NSTRUCTIONS

OLSANDOPERATION

hetrailer landinggearishand-

pportthefrontofthe trailer,whenit

he limber,orprimemover.Thetwo

e bracketmountedtothetrailerbodyand

seorA-framesection.Asecondpair of

ndinggeardolly,are retractable,andtele-

hen notinuse.Thisis accomplished

operatedbythe dualhandcranks.The

oncrankshaft.Ifasingle crankistobe

ositeside ofthevehiclemustbeplaced

wedto rotate.Turnthecrankonthe

ockwisetoraise,andcounterclockwiseto

ldhandleswhennotin use.

s.14,15 and16).Twoairhose

plingsareprovidedatthefront,and two

Thefrontcouplingsconnecttotheair

memover.Thoseattherearattachto air

sing atandemtow.Thedummycouplings

nnectornotin use.Toinstalldummy

ainstrubbersealwiththehandleend up

ubber sealandpullhandledownuntil

rhose couplingsareconnectedtovehicle

ner.Connectonehosetothe twocouplings

eothertothe"EMERGENCY"marked

es(fig.17).Twovalves,oneat either

ebody,supplyairtoa secondtrailer,when

henin theclosedposition.Whenthehandle

evalveisopen.Pull thehandlerearward

opto closevalve.

eandAirReservoir(fig.18).An

catedon thebulkheadontheleftside ofthe

trailer brakesinnormaloperationand

brakesshouldthetrailerbreakawayfrom

reservoiris bracketedtothesideof


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OLSANDOPERATION

E

OOR

BOX^

TrailerM23 FrontView

owandaheadof theemergency-relay

bottomof thetank,providesreleasefor

whichdrainsintothetank fromtherelay

alsobeusedto releaseairfromthesystem.

.70). Afilterisinstalled ineach

etweenthesourceofsupplyand the

efunctionofthisfilter istotrapdirt,

eignmaterial'whichmightdamageorcause

elayvalve.Aplugis providedinthe

ining.

t(figs.11 and19).Theelectrical

ntrailerisconnectedtothe currentsupply


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23(8-TON,4-WHEEL)


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OLSANDOPERATION

plingandDummy


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23(8-TON,4-WHEEL)

-OutCock

emControls


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OLSANDOPERATION

mperCableAtTrailerFrontSocket

ansof ajumpercable(fig.11).Afour-

chendofthejumpercable,connectsthe

oughtheirrespectivejumpercablesockets.

calsystemsmustalwaysbeconnected

.Toconnectcableandsocket,liftsocket

asshownin figure19.

.Theblackoutswitchismountedon

nose,andis protectedbyaswivelcover.

,andturntheslottedshaftofthe switch

tetheblackouttailand stoplight,whenthe

permituseof fulllights.Turntheshaft

elightsarerequired.

exsignals,oneredand oneorange,

sideof thevehicleatnight(fig.3). To

erearat night,aredreflexsignal marks

he body(fig.15).


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23(8-TON,4-WHEEL)

emControls

.15).Ahandlever,bracketedto

am,appliesthe brakeinitsrespective

ecuringparkedvehicle,bothbrakesare

everrearwardappliesthebrake.Tore-

buttonat thetopofthe leverandbesure

asitwill go.

dgepoleequipmentistherope-and-

intoone endoftherope,attachestoone

otherendofwhichis weldedatthetop

khead(fig.4). Wheninitsappliedposi-

htlyandsecuredtoa clipweldedtothe

odydoor.Figure21showstheroutinesteps

ngtheridgepole.

ors.

22).Thefusebox,weldedtothe

usedtotransporttheammunitionfuses

geofa partoftheon-vehicletoolsand

datthefront,is openedfromtherearby

dles.Anover-centertypelock,ateachend

r whenclosed.Toopenlocks,liftupward,

andle(fig.22).


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OLSANDOPERATION

GH

ANDFINISH

eRidgePole


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23(8-TON,4-WHEEL)


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OLSANDOPERATION

curedInOpenPosition

T(fig.12).Acompartmentisprovided

erbodyfor stowingthechainhoistand

t compartmentishingedatthebottom,

wnward.Thespring-loadedlatch-typelock

elatchhandle.

PARTMENT(fig.15).Thiscompart-

deof thevehiclebody.Ithousestheboom

bly.Thedoor,at therearofthe compart-


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23(8-TON,4-WHEEL)

Well RacksRemoved

nforcedtowithstandthe heavypounding

boompole,whenthevehicleisused over

movethelockingpin.

and23).Thedoors attherearof the

nedtothedoorposts byfulllengthpiano-

ward.Toopendoors,removethechannel

annelbymeansofthehandleon thevertical

asahandlemounting,thisstrap,whenin

otatthe doortreadtosecurethedoors at

e(fig.23) securethedoorswhenopen.

4,24,25and31).' Theracks,usedto

oundsbeingtransported,aremadeupof a

groupof upperhingedsections.Thefloor


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OLSANDOPERATION


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23(8-TON,4-WHEEL)

HoistToAlineTruckandTrailerTowing

pingfittedwiththethreesizesof cups

esizesof shellscarried.Thewholeunit

e bottomoftheammunitionwelland

wo steeltubes,oneateitherside ofthe

hefulllengthofthe wellsupportingthe

swhichhingeuponthem(fig.25).

,theoppositeboxsectionshingetoward

theirperforationsthussecuringtheupper,

andB,fig.31).An angleiron,oneach

pstheedgeoftheoppositesectionofthe

tenedandlockedby thecamactionofa

eft-handtube,and issecuredbyachain

tube (CandD,fig.31). Fordetailed

ofammunitionracks,refertoparagraph10.

ce.Performtheservicesinparagraph

e.

meMover.

akesbypulling bothlevers(fig.15)

e.Backprimemovertruckintoposition


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OLSANDOPERATION

ed

lockis alinedwiththeopeningbetween

es,andtheyokeblockpinis parallelwith

emoveyokeblockpin,andcarefullyclean

nthe yokeblock.Carefullybacktruck

asnearlyaspossible,in linewithhole

s(fig.26).Attachtruckhoistas shown

parkingbrakes.Lift frontoftraileruntil

NOTE:It maybenecessarytomovethe

arward,withfrontoftrailer raised,toobtain

nsertyokeblockpinthroughtrailer

keblock.NOTE:Whenthepiniscorrectly

eceweldedtothetrailerconnectionplate,

(fig. 27).Installyokeblockpinnut,and

28).Attachbrakeair hosesandopen

ttachjumpercable(fig.19).Raiseland-

position(fig.29).Elevatelandinggear

Foldcrankhandlesand secureinstrap

railercorrectlyattachedtoprimemover.

r.

Beforemovingvehicles,inspectall

nnectionsforconditionandsecurity.Besure

s anddollyarefullyretracted,andthat

sarefoldedandsecured.Seethat fusebox

cked.Becertainthatcompartmentdoors


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23(8-TON,4-WHEEL)

NKSHAFT

KEDINPOSITION

Operation


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OLSANDOPERATION

dthatbodydoors aresecuredbychannel

cleisloaded,checkeachoftheammuni-

sforproperadjustment,andseethatpowder

Seethattarpaulin isproperlyinstalled

ut-outcocksontruckareopen.Walk

orleaksin airhoses.Besurethatboth

ullyreleased.If tacticalsituationper-

erlightingsystem.Usinga coinorscrew-

ftto theleft,orcounterclockwise,fo.black-

clockwise,forservicelights.

hardjerkystarts.Thayare harm-

gconnections,thetrailer,andthetrailer

theterraintoputthe equipmentthrough.

possibleby planningthedriving.Know

safelybedonewith it.Trytomaintaina

dand,exceptfortheemergency,donotex-

peedshownontheidentificationplate.

verreversethevehiclesinclose

egroundto directthedriver.Whenback-

lthattheangledoesnotbecomeso acute

therthanrollingthetrailer wheels.Avoid

goneguideat thepointwherethevehicles

er.Beconsciousofthetotal weight

sfar aspossible,planstopsfarenoughin

erationcanbegradual,andthe resultant

he minimum.Signaltothedriversbehind

bepreparedtopass.Beforeleavingthe

ndtrailerparkingbrakes,andnote their

omPrimeMoverTruck.CAUTION:

erfromprimemovertruck,makecertain

ned thatthetruckcanbedrivenstraight

d.Thiswillavoidtheotherwiseseverecramp-

memovertowingyokebetweentrailercon-

erparkingbrakes.Shutoffairsupply lines

woairbrakehosesat trailercouplingsand

edummycouplings.Disconnecttheelec-

t correctlyinthetrailer.Removesafety

kpin. Lowertrailerlandinggearuntilthe

ecuredwithlockingpin (fig.30).Con-

gearuntil loadisremovedfromtrucktow-

theyokeblockpincanbemovedfreely.

truckforwardenoughtoseparatethe


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23(8-TON,4-WHEEL)


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OLSANDOPERATION

CKINGLEVER

ackOperation


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23(8-TON,4-WHE

ngeTubeCenterPostBoltNut

erconnectionplates.Installthepin inthe

overtruck.Installthe nutandsafetypin.

UNITIONRACKS(figs.25and31).

onracksectionsaresupportedinthe

cleisloaded.Whennoload iscarried,the

andridesuspendedfromtheirrespective

g,becertainthatall dirt,gravel,orother

emovedfromfloorplatecups.

structionscoveravehicle,loaded

figure 25,withthecenterracksupported

m pole.Seethatammunitionroundsare

pectivecups.

er,and downontotheshellsso that

kfit snuglyaroundthenecksoftheshells

exists,re-checkthepositioningofthe

cessary,thoseshellsthat arenotproperly

orotherforeignmaterialin afloorplate


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OLSANDOPERATION

ttachedToHingeTube

cocksufficientlytopreventtheclosingof

ackdownuntilassuredthat floorplatecups

o approximatelythepointshownat

dropovershellsand theleftfrontrack.

ingarmof therackjustdropped,andjar

ssible alinement.

verand forcedownagainstright-

. Withlockingleverhelddown,pull

hholeinleveruntil tightandsecurewith

31.NOTE:A/waysinsertthechainfrom

eroppositethesidebearingthelatch.In

ain,whensecured,isagainstthelatch

r.

nerdescribedabove.Disassembleand

If nopropellingchargesaretobe loaded,

stallandsecureridge pole(par.8).

racksforunloading,orpositioning

oist(par. 15).


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23(8-TON,4-WHEEL)

geTubeandRackAssemblyAwayFrom

gthetwocenterracklockinglevers.

magainstleft sideoftrailerbody.If trolley

-handsocket,hingerightsectionofcenter

ilerbody.5aiseleft-handcentersection

s infigure25.Unlatchotherracksand

tilall restagainstsidesoftrailer body.

ndRacks.

edracksectionstowardthecenterof

thelongsideangles oftheright-hand

ate.Theleft-handsectionswill hang

getube(fig. 33).

enterpostboltheadheldfromthe

terpin,nut,and flatwasher(fig.32).

(par.15).Swingboomandposition

nterof thetubeandrackassemblytobe

dchainabout16 inchesfromliftinghook,

etweenracksectionand hingetube.

erhingetube andengageloopwithlifting


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OLSANDOPERATION

beandRackSecuredInNewLocation

hattheload chain,thusattached,is

terpostbefore operatingthehoist.Liftthe

o beassuredthattheweightof theassem-

ainhoist.

lt.Liftouthinge tuberetainingpin.

rear rackovertorestonoppositehinge

ardcenterofwellandoutof support

blyrearwarduntilfrontendoftube isclear

ortpost(fig.34).

yto thedesiredposition.Enterfront

pportpost(fig.24) andpushinall theway.

correspondingslotofrearsupportbracket,

. 35).Swingrearracklockingleverto

rom insideofbody,andholdbolt

stallsflatwasher,nut,and cotterpin.Dis-

erack,followtheprocedureoutlined

2)throughd (6)NOTE:Thetrolley

etube andrackasemblyfromeitherboom

3,34and35illustrate theprocedureinvolved

ube andrackassemblyfromthe240mm

shell position.


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OLSANDOPERATION

redinLimber"A"FrameBracket

gednutsso thateyeboltholdsthebracket

emovetowingbracketyokepin.Clean

oke,andbearingsurfacesinholes intrailer

.LubricateasspecifiedinLubrication

owingbracketyokeis inlinewith

onnectionplates,andbacklimbercarefully

chingadjustmentscanbemade.Use the

evatethefront ofthetraileruntil theupper

racketwill clearthelowersurfaceofthe

erintoA-frameopeninguntilholeinlim-

callywithholesintrailerconnectionplate

holesare alinedaswellasis possible.

uts tomoveholeinlimberbrackettowing

,untilyokepinholeis alinedwithholesin

ig.37).

ecurepin withnutandsafetypin

overparkingbrakes.Looseneyebolt


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23(8-TON,4-WHEEL)

gthOfEyeBoltToPositionTowingBracket

emoveeyeboltlockpin(fig. 39),and

N:Thetowingbracketisaveryheavy

geroustopersonnelifits movementisnot

keblockpinis inplacebeforereleasing

freeendofsling ineyeboltbosson front

nstall,andlock,eyeboltlockpin.

ndaliningblockfromeyebolt. Lower

tangularholein A-frame(B-fig.38),until

lockpinholes atrearoflimbertowing

elockpin.Install aliningblockwith

linewithmatingsurfaceontrailer.Install

gsup,or awayfromaliningblock.Screw

ainstaliningblock,andtap wingswitha

upperwingednutdownintolowernut,

E:Ifonlyonemanis available,place

dnuts ontotheeyeboltbeforethe eyebolt

er frame.Usetheloweradjustingnutto

oltwiththeholes inthebracketbossesas

ll andlocklockingpin(CandD, fig.38).

correctlylockedtolimbertowingbracket.At-

uplingsonfrontoftrailer.Attachfrontends


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OLSANDOPERATION

AME

KED

LOCKINGPIND TRAILERSECUREDTOUMBER

berToTrailer


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23(8-TON,4-WHEEL)

H

POSITION!

kPin

sonprimemover,andopenairvalveson

mpercabletoprimemoverandtrailer

nggeartotravelingposition(par.9).

heeledTrailer.

nspecttrailerasrecommendedin

hecklimber-to-trailertowingbracketcon-

es.Besurethatlunetteeyeis correctly

ingvehicle.Seethat limberairhoses

heconnectorsareproperlylockedinthe

verandon thetrailer.

megooddrivingpracticespertain

wheelorsix-wheeltrailer,oratandemtow

sthetowedload increases,bothasto

tthe degreeofdrivercareandvigilance

ytrue,wherestopsareconcerned.The

onscious,atalltimes,ofthe maneuver-

atisticsofthevehicleswhenthemarch

DTRAILER.Whereverpossible,avoid

ismaneuverunlessatleasttwomenare

nthe driver.Inthecaseofa tandemtow,

secondtrailerfromthefirst trailerandback

n.

oavoidundueandunnecessarystrain

ailerconnectors,thedrivermust planhis

ewherethevehicleslosemomentumwith-

esandthen haltonlevelground.Usethe


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48/211

possible,stopsothatthe loadcanbestarted

.Alwaysapplytheparkingbrakeson the

trailers,beforel eavingthevehicles.

Limber.

ailer andprimemover.Remove

ockpinnut,andremovenut. Lowertrailer

portingthefrontof thetraileroruntil the

canbeturned.CAUTION:Donotre-

Disconnectelectricjumpercablefrom

ckets,andstowin trailer.Disconnectair

mycouplings.Loosenandremoveupper

Removelowerwingednutand alining

eyeboltlockpin,andremoveeyebolt.

ontoflimber bracket,andinstallandlock

39).Screwfirstwingednut,all theway

owardrear ofvehicle.Installaliningblock

ramebracket,andinstallsecondwinged

ront,and screwuptothebracket(fig.36).

.Raisefrontoftrailer sufficiently

of towingbrackettoclearlowerfrontsur-

rforwardandinstall yokeblockpinin

.Installnutandsafetypin.

,24and40).

ontrailerisequippedwitha boom

.40).Its purposeistofacilitatetheload-

romtheground,loadingplatformor an-

ctivecupsinthe floorofthetrailerbody.

unloadingoperations.

hoistiscomposedofa boompole,an

stabletensionrod,a four-wheeledball

earing spur-gearedchainhoist(fig.13).

callyinoneofthetwo socketsprovided,

enteroftheammunitionwell(fig.24).The

hthetrolleyinplace,is attachedtotheboom

gpin.Boom-to-boomalinementismain-

sionrod.The trolleytravelislimitedby

erendoftheboom,and byawheelstopat

m.


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50/211

leyonBoom

n.Inspecteyein liftingclevisandsup-

earorfracture.Inspecttrolleywheelsfor

yrotatefreely.Try handsheaveonhoist

pecthooksatcrossheadandon loadchain

Disconnectandremoveridgepole,if

magetorope.Unlockandopenreardoors

fig. 23).NOTE://vehicleisloaded,

bablyobstructingholeattopof boompole

eselsewhereontheload,preferablyonthe

e.Seethat insideofsocketisclearedofany

liftboompoleinto trailerandlowerthe

rintothedesired socket(fig.24).

ROLLEY.Liftboomassemblyintotrail-

tboomendslotis towardcrew.Install

e41.Withtrolleyheldat outerendof

secondmantoliftandguide innerend,lift

nto slotinboompole(fig. 42).Raise

ertop ofboompole,andrestthreaded

medatpoletopandsecurewith lockingpin

elockingfeatureofthe lockingpinis


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23(8-TON,4-WHEEL)

REWSEAT

mandTensionRodAssembly

manat outerendofboommovetheboom,

ondmancan installtheboomlockingpin.

hatboomissquarewithboompole (fig.44).

ckwiseoneadditionalfullturn.NOTE:

ter endoftheboompolesufficientlyto

hichisto belifted.

Liftchainhoistintotrailer.Lifthoist,

adhookinto eyeoftrolleyliftingclevis

dstowinhoist compartment.

gouter endofboom,turncounter-

rank,andloosentensionrod,untilit canbe

vetensionrodlockingpinandlift tension

anddownontotopof boom.Remove

ngpin.

dofboomretainstrolley,pull boom

emovetrolley,andlowertheboompole

etotheground.Usetwomento liftboom

outofthevehicle.

olein compartmentatrearofvehicle.

rtment.Close,andsecure,bothcompart-


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52/211

m-to-boomPoleLockingPin

omToProperLevel


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53/211

23(8-TON,4-WHEEL)

chainridesin theloadchainsheave

andisattachedtoits loadbymeansofa

hainend.Theload chainisraisedor

andchain.

esshandchainridesin thelargehand

thehoist.Astheoperatorfacesthe sheave,

erightsideof thesheaveraisestheload

utofleft sideofsheavereleasesbrake

Theload isautomaticallyheldatthe

ofthehandchainceases.

re closed,open,andsecurethem.

twherethehoistis directlyabovethelifting

owerloadingchainasneededandengage

eoftheshell.Elevatehoist sufficientlyfor

onsandswingboomrearwarduntil shellis

eentheopendoors.Raisehoistuntilbottom

abovethelevelofthetrailer floor.Oneman,

dguidestrolley,untilshell isdirectlyover

NOTE:In ordertopreventdamageto

uredthateachshell willsetsquarelyinits

foreloweringshell,andremoveanysand,

terial.Lowerslowlyandguideshell all

nfloorplatecup.Disconnectloadchain

senridgepoleandplaceropein front

enreardoors andlatchinopenposition.

s.

par.15).Openammunitionracks

,onboompoleside,withchainaround boom

ationofunloadingisin theuseofthe

subparagraphaand babove.


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54/211

TIONALMAINTENANCE

ONS.

ationOrderNo.799prescribeslubri-

e8-ton,4-wheelAmmunitionTrailerM23.

not exactfacsimilesofWDLONo.799,

tionasdoestheWDLO.

acedonor isissuedwitheachitemof

edwithitatall times.Intheeventthe

utsuchacopy,theusing armshallimme-

ementfromtheCommandingOfficer,Fort

Detroit32,Michigan.

edontheOrderarefor normaloperating

ntervalsunderextremeconditionssuchas

mperatures,prolongedperiodsofhighspeed,

dordust,immersionin water,orexposureto

hmayquicklydestroytheprotectivequali-

quire servicinginordertopreventmalfunc-

ateriel.

edinthe"Key"in accordancewith

;above+32 F,+32 Fto0 F,andbelow

ochangegradesof lubricantsbymain-

erationofthe vehicleduringtheapproach

rdinarilyitwillbenecessarytochange

henairtemperaturesareconsistentlyin

ange,unlessmalfunctioningoccurssooner

thin ortooheavy.

ONINSTRUCTIONS.

Operatelubricatinggunscarefully

nsureaproperdistributionof thelubricant.

stick,andpreventtheentranceof lubricant,

erminecause.Replacebrokenordamaged

nnotbereplacedimmediately,coverhole

withtape,topreventthe entranceofdirt.


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23(8-TON,4-WHEEL)

uc.Mwob,tof

rder AmmunitionTrailerM23


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57/211

23(8-TON,4-WHEEL)

yallpartsthoroughlybeforeapplying

ividualUnitsandParts.The fol-

ment,andrepeatforclarity,thosenotes

hichpertaintolubricationandserviceof

movebearingsfromhubandwashin

tilallthe oldlubricantisremovedfrom

earing cone.Drybearings.Wheelbear-

wheelbearingpackerwithGREASE,gen-

d packedbykneadingthelubricantintoall

outersurfacesof thebearingconeassembly

ebeforeassembly.Theinsidesurfacesof

tsideofthespindleshallbe wettedonly

pose,No.2.Themaximumthicknessof

be%6inch.Nolubricantshallbe packed

enthelimberisbeingused overdusty

ehousingrequires morefrequentservice.

conditions,performthefollowingoperations,

blethelunetteasdescribedinpara-

ousingandcleanallmovingparts

Makecertainthatnoneoftheoldgrease

,front andrearbushingsandhousing

usingVa fullwithlubricantrecom-

der.

secure.

TOWINGBRACKETBEARINGSURFACES.

verdustyorsandyterrain,the yokepin

cesmustbeserviceddaily.Removethe

gsurfacesandlubricationgroovesthor-

olvent.Carefullycleantheyokepinbore

he samemanner.Whenthecleanedsur-

gsurfaceswiththerecommendedlubricant,

ARINGSANDTOWINGBRACKETSPINDLE.

theLubricationOrdercoverservicingof

cedroads.Whenthe useisindust orsand,

eandrockerpinmustbe lubricatedonce

PublicDomain,

Google-d

igitized

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athitrust.org/access

_use#pd-g

oogle


58/211

PIN

DLINK

NGBEAMFWALKINGBEAMINNERBUSHING

NTER

ricationViews(Trailer)

PublicDomain,

Google-d

igitized

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_use#pd-g

oogle


59/211

23(8-TON,4-WHEEL)

USHINGB OUTERCAMSHAFTSUPPORT

SPARINGLY(4FITTINGS)

ITTINGS)

SPARINGLY

NGS)



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S

ELEG

LGEARS



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23(8-TON,4-WHEEL)

ITTINGS)FWHEELBEARING(!FITTINGS!

icationViews,HeavyCarriageLimberM5


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62/211

VEMAINTENANCESERVICES

gsmustbe lubricatedevery4hours.Lubri-

essuregun,until cleangreaseisforcedout.

antheeyeboltthreadsandthe threads

bricatelightlyaftercleaning,andremove

thevehicleisused throughsandordust,

not lubricate.

catebrakelever,links,clevisandpins,

.

LUBRICATION.Springleavesdonot

ubricatedoororfuse boxhinges.

nsarecloselyfollowed,properlubri-

ryresultsarenotobtained,reportthe trouble

ponsibleforthemaintenanceofthemateriel.

maybe keptintheDutyRoster

.


ficiency,itisnecessarythatthisvehicle

edatintervalseachdayitis operatedand

aybediscoveredandcorrectedbeforethey

failure.Certainscheduledmaintenance

atthesedesignatedintervals.Theservices

ethoseperformedbydriverorcrewbefore

on,athalt,andafteroperationandweekly.

enanceservicesarelistedontheback

PreventiveMaintenanceServiceRecord"

vehiclesofall typesandmodels.Items

esbutnotlistedon W.D.FormNo.48are

uresundertheitemstowhichtheyare re-

onthe formthatdonotpertainto the

natedfromtheproceduresaswritteninto

ationmustthoroughlyschooleachdriver

anceproceduressetforthinmanuals,

ecificallyonW.D.FormNo.48 ornot.

D.FormNo.48,thatpertaintothese

thismanualtoprovidespecificprocedures


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23(8-TON,4-WHEEL)

einspectionsandservices.Theseservices

spectionandconservethetimeof the

arilyinthe samenumericalorderasshown

em numbers,however,areidentical

orm.

ofeachitemappliesalso toanysupport-

,andgenerallyincludesachecktosee

ngoodcondition,correctlyassembled,

rn.

condition"isusuallyan externalvisual

hetherornottheunit isdamagedbeyond

Theterm"goodcondition"isexplained

otbentor twisted,notchafedorburned,

bareor frayed,notdentedorcollapsed,

orated.

toseethatit is"correctlyassembled"

linspectionto seewhetherornotit isin

tioninthe vehicle.

todetermineifitis "secure"isusually

ation,ahand-feel,orapry-barcheckfor

tionshouldincludeanybrackets,lockwash-

s,orcotterpins usedinassembly.

beunderstoodtomeanwornclose-to,

its,andlikelytoresultin afailureifnot re-

eduledinspection.

ctoryoperatingcharacteristicsbeyond

o correctmustbereportedattheearliest

tedindividualinauthority.

ERVICE.

nscheduleisdesignedprimarilyasa

lehas notbeentamperedwith,orsabotaged,

Servicewasperformed.Variouscombat

eredthevehicleunsafeforoperation,andit

determinewhetherornot thevehicleisin

missionto whichitmaybeassigned.This

yomitted,evenin extremetacticalsitua-

erationServiceconsistsofinspecting

ngtotheproceduredescribed,andcorrect-

ncies.Uponcompletionoftheservice,

promptlytothe designatedindividualin


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64/211


DDAMAGE.Lookforanyinjuryto

accessoriesandspecialequipment,caused

collision,fallingdebris,orshell firesince

KS.Examinetrailerair brakereser-

,andconnectionsforloosenessor damage.

dclosedraincocks.Besure truckto

urelyconnected,andlinesproperlysup-

S)ANDREFLECTORS.Cleanall

eflectors,andexaminethemforlooseness

tionpermits,openandcloseall switches,

ndproperly,includestop andblack-out

LANGENUTS.Inspectalltrailer and

daxleflangenutsto seethattheyarepres-

alltrailerandlimbertires areprop-

maximum)cool,andthatvalvecaps are

emoveobjectslodgedintreads,and car-

mage.

WALKINGBEAM,ANDSUSPENSIONS.In-

andspringsforloosenessor damage.In-

dercarriersandstub axleassemblies.Look

ndbrokenorshifted leaves.Seethatspring

ndsecure.If limberisconnected,support

examinetowingbracketspindlefor exces-

NECTIONS.Inspectalltowingdevices

dcondition,securelyconnectedormounted,

rtowingbracketspindleoperatesproperly,

,seethat yokeblockpinissecured,and

andfastened.

AMMUNITIONRACKS,RIDGEPOLEAND

soperateproperly,and latchsecurelyin

ethatany loadcarriedissecureandprop-

rpaulinis ingoodconditionandproperly

rdamageorlooseattachmentsand,if

onroundsarein correctpositionandprop-

edboxsectionsofammunitionracksfor

tracklockingleversarein goodcondition

ht,and properlylatched.Seethathinge

damaged,andthatretainingpinsarein

check,andateachloading,noteoperation


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65/211

23(8-TON,4-WHEEL)

kinglevers,chainsandlatches.Carefully

rayingand wear,particularlyatspring

e contactstopofreardoorand locking

ensionandsecurity.

QUIPMENT.Besureallitemsof

dstandardandspecialequipmentarepres-

erlystowedormounted.Inspectchainhoist

dition.Examinehookatcross headtosee

nsonswivelfreely.Examineloadand

surethatall linksareserviceableandnot

kforexcessivebearingwearorlooseness

ckhandchainsheaveforexcessivewear.

ng,checkoperationofhoistbeforeuse and

ngactionofratchet.Seethattrolleywheels

cessivelywornorfractured.Inspecttrolley

e suretheyaresecureinframe.Inspect

ortingcrosspin forserviceabilityandse-

BLICATIONS.Checktoseethat Oper-

Order,andFormNo.478arepresentin

erlystowed.

ERVICE.

nmotion,listenforanyunusualnoise

ueals,orhumsthatmayindicatetrouble.

onsoftroublefromanypartof vehicle.

mponents,suchasbrakesorbearings,or

htimebrakesare applied,orvehicles

and noteanyunusualorunsatisfactory

kbrakeinstrumentsconstantly.Notice

rumentindicationsthatmaysignifytrou-

erationServiceconsistsofobserving

ngtotheproceduresfollowingeachitem,and

onsofserioustrouble.Noticeminorde-

orreportedatearliestopportunity,usually

NDBRAKES.Testtrailerbrakeappli-

eration.Foot-and-handappliedairbrakes

velywithnormalpressureorleverage,and

st trailerbrakeseparatelyforeffective

R.Beonalert foranyunusualoper-

sefromwheels,axles,orsuspensionunitson


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66/211


indicatelooseness,ordamagedorunder-

Y.Noteanynoiseorabnormalcon-

mightindicateshiftingofload,loosetar-

oors,hardware,specialtrailerequipment,

ents.Observeanyunusualswaythatmight

erlyconnectedtowingdevices.

vicemayberegardedasminimum

ndshouldbe performedunderalltactical

oreextensivemaintenanceservicesmustbe

her.

viceconsistsofinvestigatinganyde-

eration,inspectingitemslistedbelowaccord-

wingtheitems,and correctinganydeficien-

otcorrectedshouldbereportedpromptly

alinauthority.

ES:HUBS,BRAKEDRUMSANDAXLES.

achlimberandtrailerwheelhub, trailer

eambearinghousingtosee iftheyare

SUSPENSIONS.Examinetrailersprings,

uspensionsforloosenessordamage.

LANGENUT.Seethattrailer and

dflangenutsarepresent andsecure.

all trailerandlimbertiresfor under-

rectpressureis70pounds(maximum)

gedintreads,carcasses,andfrombetween

S.Besurebrakesystemair linefilters

l connectionssecure.

NECTIONS.Inspectalltowingconnec-

age.Besurelockingand safetydevicesare

eckconditionoftowingbracketspindle,

ecuredbynutand cotterpin.Seethat

sentandlocked.

RIDGEPOLEANDTARPAULIN.Exam-

railer forloosenessordamage.Seethat

oomandboompolecompartmentdoorsare

ustbeproperlydistributedandsecure.See

Tarpaulinmustbeproperlylashedwhenin


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67/211

23(8-TON,4-WHEEL)

trailerlights,and warningreflector

enessanddamage.

DWEEKLYSERVICE.

onServiceisparticularlyimportantbe-

erinspectshisvehicletodetectanydefi-

veloped,andcorrectsthoseheispermitted

romptlyto thedesignatedindividualin

inspection.Ifthisscheduleisperformed

lbereadyforuse onamoment'snotice.

vice,withafewexceptions,isthennecessary

ornotthe vehicleisinthesamecondition

ompletionoftheAfter-operationService.

ceshouldneverbeentirelyomittedevenin

s,butmaybereducedtothebare funda-

ortheAt-haltService,ifnecessary.

ormingtheAfter-operationService,

,andconsider,anyirregularitiesnoticed

re-operation,During-operation,andAt-halt

tionServiceconsistsofinspectingand

ms:(ThoseitemsoftheAfter-operationthat

* )requireadditionalweeklyservices,the

ndicatedinstep(b) ofeachapplicable

S)ANDREFLECTORS.Cleanglass

ontrailerforloosenessordamage.If

testalllightswitchesforcorrectoperation,

pondproperly.

WIRING.Examineallaccessiblewiring

rforloosenessordamage,wipeoffgreaseor

gis supportedsoasnotto chafeagainst

nejumpercableforchafingorbrokeninsu-

lsare ingoodcondition.Examinecable

rtaintheyareclean;thatsealsareserviceable,

ctsareingoodcondition.

RS.

fordamageandloosemountingsor

umulatedsedimentandwater.

bowlsandelements,washindry-clean-

ecurelyusingnewgasketsas necessary.

bertires,i ncludingspares,fordamage

oveobjectslodgedintreadsandcarcasses,


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68/211


nspectforproperpositionof valvestems

s.Inflatetocorrectpressure,70pounds

ywornorotherwiseunserviceable

viceabletireswhichshowabnormalwear

wheel positions.Apparentmechanicalde-

ouldbereportedforattentionby higher

USPENSIONS.Examinetrailersprings,

leassemblies,includingbrakechambercar-

ngsforloosenessanddamage.Checkopera-

ndlimber,andcheckconditionoflimber

ANKS.

trailerforloosenessanddamage.See

ht,andthat airlinesareproperlysup-

onothervehicleparts.Drainwaterfrom air

s.

toperateallbrakecontrolvalvesand

tank mountingsandallconnectionswhere

omall trailerairlinerubber hose.

ONNECTIONS.

e andtowingshacklesforlooseness,

ear.Examinelimbertowingyoke,yokepin

or damage.Seethatlockingorsafety

locksecurely.

ingdevicemountingandassembly

onnectingandlockingmechanismfor

AMMUNITIONRACKS,RIDGEPOLEAND

ycarefullyfordamageorlooseparts.See

roperly,and latchsecurely.Anyload

stributedandsecurelystowed.Inspect

ionsupportsfor damageorlooseness.In-

assemblywelds.Inspecthingedboxsec-

fordamage.Ifloaded,seethat racklocking

n,,andthatchain locksaretightandprop-

etubesare straightandnotdamagedand

place.Whenloadpermits,check,andat

onofallboxsections,racklockinglevers,

eris notloaded,removealldirt,gravel

fromammunitionrackfloorplatecups.

eropeforfrayingand wear,particularly


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70/211


ng'ht

andbolt tight,

cesthissight/


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72/211

NTIVEMAINTENANCE

ricantretainerseals,a coatingofthe

overthesealingsurfaceof thelipofthe

aleatherseal,soakitin SAE10engine

ratleast 30minutes.Then,theleather

ullybyhandbeforeinstalling theseal.The

ormarred.

ofeachitemappliesalso toanysup-

ction,andusuallyincludesachecktosee

ngoodcondition,correctlyassembled,se-

Themechanicsmustbethoroughlytrained

nsoftheseterms:

condition"isusuallyan externalvisual

hetherornottheunit isdamagedbeyond

Thetermgoodconditionis explainedfur-

ent ortwisted,notchafedorburned,not

eorfrayed,notdentedor collapsed,not

d.

toseethatit is"correctlyassembled"

linspectionto seewhetherornotit isin

tioninthe vehicle.

todetermineifitis "secure"isusually

ation,awrench,hand-feel,orapry-barcheck

pectionshouldincludeanybrackets,lock

gwires,orcotterpinsusedin assembly.

beunderstoodtomeanwornclose-to,

its,andlikelytoresultin afailureifnot

cheduledinspection.

eareindicatedbyrepeatingtheitem

hichshowtheintervalat whichtheservices

howthat theparts,orassemblies,areto

yservices.Forexample,anitemnumberin

siteaTIGHTENprocedure,meansthatthe

ectmustbe performed.Thespecialserv-

aryadjustmentsinaccordancewiththe

chnicalmanual,specialbulletins,orother

vehiclewithdry-cleaningsolventto

dirt,andotherforeignmaterial.Afterthe

emin cleansolventanddrythemthor-


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73/211

23(8-TON,4-WHEEL)

thepartscleanuntil reassembled,and

ningsolventawayfromrubberorother

mage.Cleantheprotectivegreasecoat-

s materialisnotusuallya goodlubricant.

sapplieseithertolubricationopera-

nthevehiclelubricationorder,andto

uchorders,butshouldbeperformedincon-

nceoperations,ifpartshavetobe dis-

orservice.

sistsof performingspecialoperations,

gunits withoil,andcleaningorchanging

ge.

perationsshouldbeperformedwith

forceonthewrenchhandle)totightenthe

chanicalpractice.Usetorque-indicating

Donotovertighten,asthismaystripthreads

ningwillalwaysbeunderstoodtoinclude

ockwashers,locknutsandcotterpins pro-

ing.

itdifficulttoperformthe complete

proceduresatonetime,theycan sometimes

nningtocompleteall operationswithin

ailabletimeat haltsandinbivouacareas

ry,toassurethat maintenanceoperations

tedbythetacticalsituation,itemswith

umns,shouldbegivenfirst consideration.

eventivemaintenanceproceduresthat

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

veMaintenanceServiceWorkSheetfor

ehicles.Certainitemsontheworksheet

ehiclearenotincludedin theproceduresin

enumericalsequenceofitemson thework

anualprocedures,butinsomeinstances

ervationofthemechanic'stimeandeffort.

ES.Theproceduresforperformingeach

onthly)and6,000mile(six-month)

whichevershalloccurfirst,aredescribedin

ageofthecharthas twocolumnsatits

the6,000mileand the1,000milemainte-

oftenitwillbefoundthata particularpro-

oth scheduledmaintenances.Inorderto

retofollow,lookdownthecolumncorre-

ncedue,andwhereveranitemnumberap-

onsindicatedoppositethenumber.


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74/211

NTIVEMAINTENANCE

tuationdoesnotpermit

oseitemswhichrequire

e vehicle.Whenaroad

eforpreferably4,and not

on.Performthisinspec-

aph20.

ect,Feel,SidePull,

ontrol).Operatetrailer

uringroadtest.

brakessufficientlyto

afedistanceandobserve

ulltooneside,unusual

ouldhaveJ/4-to %6-mch

rollerandplunger.Note

that mightindicateun-

ailerparkingbrake

de.Trailerparkingbrakes

erwhenin fullyapplied

ents,Body,Wheels).Be

stforanynoisefrom

ndicateloose ordam-

assistantlistenparticularly

eelmountings,suspension

s.

esttrailerairbrakesfor

governedmaximum.With

nestopped,thereshould

pressurewithinonemin-

occursduringthischeck,

ap sudsmethod.

ms,Hubs).Atcomple-

s andhubsofbothlim-

allyhightemperatures.

rbrakelineair filtersto

dition,securelymounted

aking.Cleanandservice

Orderinstructions,para-

are inplaceandalljoints

etight.


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75/211

23(8-TON,4-WHEEL)

msandCaps,Condition,

eCarrier).Inspectboth

follows:

Observeifallvalve

nandi ncorrectposition,

esent,andinstalledse-

pliers.

resforcuts,bruises,

oveembeddedglass,nails,

lartreadwear,watching

upping,featheredges,and

tireswornthinatcenter

eabletires)and exchange

Anymechanicaldeficien-

nsshouldbedetermined

Wheelpositionsoftires

bechangedto evenup

perlyinflated,inspect

tchedaccordingtooverall

ftread.

eifsparetirecarrieris in

e.

dtheirlockringsor

onandsecure.

elmountingandflange

ilertiresproperlyin-

checkoverallcircumfer-

pares.They shouldnot

circumferenceexceeding

incurrentdirectivesand

ustbematchedproperly

e oftheroadwheelsat

netydays.Aconvenient

esemaintenanceservices.

ngthetire-matching

eelsuntilwheel-bearing


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76/211

NTIVEMAINTENANCE

ds,CamsandShafts).

erviceasfollows:Re-

,000-milemaintenance,

brakeitemsupto 52are

p.Performinbestorder

derlyreassembly.

DS.Cleandirtandgrease

skeepingdry-cleaning

Examinedrumsand

goodcondition,securely

excessivelywornorscored.

minecamsandshafts,

fthey areexcessively

efreelyincollar,and if

.

ustshieldcapscrews

urely.

hors,Springs).With

pectliningstoseeif they

lysecuredtobrake shoes,

thdrums,freeofdirt or

velyworn.Seeifshoesare

ysecuredtoanchors,

gs,andthatsprings have

shoesproperlytoreleased

gatmostwornpoint

ast1,000milesofservice

yto contactdrums.If

indeepwater,mudor

fullyfordamage.Replace

ndlubricatewheelbear-

aph18.Adjust bearings

7.

reasefromlinings

ompressedair.

trelateditemsto56in-

ustshoes.Ifnewlinings

tbymajormethod.Ad-

hragmpush-rodtravelis

y1inch.


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77/211

23(8-TON,4-WHEEL)

ethatrods aretightand

correcttrackingexplained

s,SupportBrackets,

nspectallitemstoseeif

correctlyassembled,and

mblyormounting

ndNuts).Inspectand

dtrailerwheelstosee if

and secure.

heck.forloosenessof

t.Revolvewheelsand

damagedbearings.In-

brakedustshieldsfor

ricant.

elbearingsandtrailer

ingbeam.Cleanthor-

ventandexaminebearings

yareingoodcondition;if

ontactareingoodcondi-

cessivewear.Remove

ngcapsand examineboth

capsasdescribedin para-

dingtoparagraph97.

henalloftherelated

erewheelbearingsareto

earingsaccordingtoin-

rderandasfollows:Take

nanddry,thehands

ant.Theinsideofthe

hubflange,andoutside

ewettedonlytoa thick-

withlubricanttoretard

eithermachinepacked,

nglubricantintoall

atthecupsor outerraces,


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78/211

NTIVEMAINTENANCE

with lubricants,andin-

rsealsif necessary.

largecavityinwheel

ngswithlubricant.Todo

sttheseals.

railercentercrossaxle

ewalkingbeamandhub-

place,andadjustwheel

ingtoparagraph37.

Bolts,Hangers,and

rei ngoodcondition,

ecure.Springclipsand

pringleavesshouldnotbe

position.This maybean

terbolt.Noteif deflection

ndapproximatelythe

racksandboltsforex-

apry bar.

et,pawl,andlinkagefor

atreservoirisin good

noffwaterandclosedrain

rstubaxle assembliesto

dition,correctlyandse-

ngbeam,andinproper

rdamageorsag,and see

rethat clipsandsaddles

mbers).Inspecttrailer

ets,siderails,trailerfloor

toseeiftheyare ingood

rectlyalined.Ifamisaline-

ondition.

mets.Observethese

ilerto seeiftheyarein

upported,connected,and


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79/211

23(8-TON,4-WHEEl)

Hose).Examineall

rakehoseonbothtrailer

nd limbertoseeifthey

relyconnected,andsup-

notchafeagainstother

lerairbrakerelayvalve,

kefluid,andreinstall

cateallpointsof vehicle

tionsinvehicleLubrication

tingonlythoseitemswhich

theforegoingspecificpro-

ordamagedlubricationfit-

ose,Wiring,andCon-

seandwiringconnections

dconditionandsecurely

andbracketssothatthey

ith workingparts.Check

estoseethat theyoperate

oistenrubbersealsor

gcouplings.

tchet,Brakes,Cross

ain).Inspectchain

orrectassemblyandse-

sheadtoseeif itisserv-

elsfreely.Notewhether

nfittingsarepresentand

dandhandchainscarefully

serviceableandnotdam-

xcessivebearingwear

iveling.Checkhandand

essivewear.Seethattrol-

re notexcessivelyworn

ywheelaxlesforwear

reinframe.Inspectlifting

crosspinfor serviceability

cthoistchainsforbroken,

edlinks,andforrusty

ofchainswithcloth satu-


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80/211

NTIVEMAINTENANCE

kerosene.Aftercleaning,

oist andtrolleytoproper

Stop,andBlackout).

sandnoteif lampsre-

ackoutlights.Examine

eyarein goodcondition

diflensesareclean.

eyareallpresent,in good

re.

splatforms,braces,stow-

kets,floorplates,anddoors

condition,correctlyas-

ounted.Inspecthingedbox

cksfordamage.Ifloaded,

sarein goodcondition

ht andproperlylatched.

traightandnotdamaged,

inplace.Whenloadper-

ading,noteoperationof

nglevers,chains,and

ridgepoleropeforfray-

atspringloop,and at

topofreardoor andlock-

ortensionandsecurity.

ehooktoseeif itis

relymountedtoframe.

eiftheyoperateproperly;

;andiflockpinis present

chain.Payparticular

orworndraw bar.

nepaintofentiretrailer

goodcondition,paying

brightspotsin finishthat

tion.Inspectvehicle

onforlegibility.Include

eirmountings,iffur-

arlunetteeye,tosee if

ure,andnotexcessively


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81/211

23(8-TON,4-WHEEL)

mblyandmounting

etowingbracketuniton

oodcondition,andcorrect-

ccessiblefrictionsur-

deyeboltassembliesfor

ear.Ifattached,disconnect

yokethoroughly,inspect

eaccordingtoinstructions

graph18.Inspectlimber

goodconditionandexces-

ychainsare present

railerairlineconnections

suretheyarein good

yworn,andwillcouplese-

orts).Examinelegs,

eiftheyarein goodcon-

essivelyworn.

mblyandmounting

ardandspecialtools,and

securingequipment,to

refertovehiclestowage

goodcondition,clean,

urelymounted.

Seeifitis ingoodcon-

emsarepresentandprop-

eficienciesimmediately.

26.Thetrailerand

icationOrderandStand-

ReportForm),and

ajorUnitAssembly

uldbepresent,legible,

mpleted).Inspect

odificationWorkOrders

denteredonFormNo.478.


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82/211

alroad testrechecking

clusive.Confinethisroad

cenecessarytomakesat-

OTE:Correct,orreport,

ngfinalroadtest.

hsprovideinformationandsuggesttests

causesofthemorecommontroubles

underaverageconditions.Eachsymptom

ndividualunit orsystem,isfollowedbya

e trouble.Wherepertinent,atestto

sshownafter thatcause.Frequently,the

rouble.Whennotestis given,theremedy

YSHUTOFFATTOWINGVEHICLE.

oftowingvehicle.

WEENTRUCKANDTRAILERNOT

ecertainairjumperhosetagged"Service"

ontrailertagged"Service".Serviceline

oftrailer.

SURE.Checkairpressuregageon

mustnotbebelow60pounds.

CKOPEN.Closedraincockonreser-

ningHot.

NT.Adjustbrakes(par.41b).

KENINDRUM.Replacespring(par.

ANCHORPINSORCHAMBERRODEND

isassembletomakeneededrepairsor


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83/211

23(8-TON,4-WHEEL)

ROD.Replacebrakechamber(par.

.Replacedrum(par.36).

orSlowRelease.

SURE.Checkairsupplyattowing

chnicalManualorTM9-1827A.

CHAMBERPUSHROD.Adjustbrakes

Cleanaircleaners(par.46).

G.Lookforkinkedordentedtubing.

N.Lubricateanchorpin,cams,slack

et,andchamberpushrodpin(par.18).

NRELAY-EMERGENCYVALVEEXHAUST

body,replacerelay-emergencyvalve(par.

GCONNECTORS.Tightenconnector

isappearsorreplaceconnectorassembly

ATSERVCELINEOREMERGENCYLINE

gedpackingringinhose coupling.Replace

ATSERVICELINECOUPLINGWHEN

ECTED.Dirtyorworninletvalve,replace

ar.47).

ATEMERGENCYLINECOUPLINGWHEN

ECTED.Defectivecheckvalvediskorde-

cerelay-emergencyvalves(par.47).

usedfromoverlubricatingofanchor

earing.Replacelining(par.42b).

TMENT.Adjustbrakes(par.41b).

.Replacedrum(par.42b).

placeshoes(par.42b).

TOFADJUSTMENT.Adjustwheelbear-

PERLYCONNECTEDFROMTOWING

operly(par.8b).

HEAPPLIEDPOSITIONATTOWING


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84/211

edtotowingvehicle,placethe control

trailerisdisconnectedfromtowingvehicle,

ir.

LVEINEMERGENCYPOSITION.Build

clebrakesystemor opendraincockatres-

SEDONTOWINGVEHICLE.Opencut-

GORHOSE.Checkalltubingand

old.

RATCHET.Replaceleverassembly

KELININGS.Replaceshoes(par.42b).

ERBOLTS.Replacespringcenterbolt.

RBROKEN.Replaceorrepair.

tenU-bolts.

ES.Replacespringleavesorspring

BUTION.Distributeloadevenly.

RCH.Replacespring(par.71).

BEAMBUSHINGSORCENTERCROSS

withnewparts(pars.62,67and68).

ACKLEORLINK.Replacewornparts.

ORRADIUSRODS.Tighten.

ES.Replacebrokenleavesorspring

PSBROKEN.Replacespringorleaves

BEAM.

kingwithThoseof DollyorTowing

OUTOFALINEMENT.Placeaxlein


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85/211

23(8-TON,4-WHEEL)

NEMENT.Replacewalkingbeam

OPERCAMBER.Checkaxlecamber

laceaxle(par.67).

heckaxleforbend(par.69).Re-

Replacewalkingbeam.

enWearand Cupping.

ENT.Firstcheckaxleforbend(par.

inalinement(par.69).

eforbend(par.69).If bent,replace

hten.

NGSWORN.Replacewalkingbeam.

oTurn.

NORIMPROPERLUBRICANTUSED.

bricationOrder(par.18).

eplaceorstraighten(par.73).

SINGBINDINUPPERLEG.Replace

emovebevelgearcoverfromright

spectgears.Replace(par.73).

elandinggear(par.73).

espondWhenTurningOneCrank.

KSHAFTORINBEVELGEARSHAFT.

REDINBEVELGEARSHAFT.Replace

EDINSCREWS.Replacefeatherkeys

TIRES.

UTS.Tighten(par.36).

ELBEARINGSBURNEDOur.Replace


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86/211

eforbend(par.69).

wheel(par.36).

N.Lubricate(par.18).

RCUP.Replacebearing(par.36a(2) ),

2)).

ARINGADJUSTMENT.Adjustwheel

LATION.Inflatetiresto70-poundpres-

PROPERLOADDISTRIBUTION.Loadto

teloadevenly.

etroubleshooting(par.28).

DrumorOutsideofWheel.

ETAINER.Replaceretainer(par.

cehub(par.36a(2) andd(1)).

UBRICATION.Relubricate(par.18).

CKETSPINDLE.

ayBetweenSpindleandAxle.

cethespindle(par.95).

AXLEEXCESSIVELYWORN.Checkthe

CALLYINITSMOUNTINGS.Tighten

NGINYOKEBLOCK.Tappinout of

ricate(par.13b(3) ).

UGGEDINTOTRAILERFROMTOWING

ble.

INGVEHICLEINTHE"OFF"POSITION.

VEHICLENOTSUFFICIENTLYCHARGED.

ehicle.

WINGVEHICLE.Checkwiringontow-


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87/211

23(8-TON,4-WHEEL)

DWIRES.Checkwiringsystemfor

Replaceorrepair.'

BLE.Checkandreplace(par.83).

EFECTIVE.Replaceswitch(par.87).

CONTACTBLADESINCOUPLINGSOCKET

theblades.

.

VEHICLENOTSUFFICIENTLYCHARGED.

LAMPSOCKETS.Removelamp-unitand

TERMINALSATTOWINGVEHICLEBAT-

NotBurn.

NIT.Replacelamp-unit(par.84).

wiresfordamage.Replaceorrepair.

MBLY.Replacelight-assembly

LAMPSOCKET.Removelamp-unitand

relyin CenterofWell.

placehingetube(pars.5,77, and78).

G.Notifyhigherauthority.

OUTOFPOSITION.Besureallshells

sand thatcupsareclean.

CURED.Installortightenbolt(par.

erationUnsatisfactory.

.Replacelever.

placehingetube(pars.76,77and78).

YCLOSED.Alineshellsandcloseracks.

FALINEMENT.'Notifyhigherauthority.

Sheaves.

EFORMED.Ifhandchain,replace

.Ifload chain,notifyhigherauthority.

GUMMEDORDIRTY.Carefullyclean


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89/211

23(8-TON,4-WHEEL)

mEndSupportedForWheelRemoval

00

O

899

4882

enumber)C67935

4O


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90/211

NDBEARINGS

heelNutsUsingHandImpactWrench

EMBLY,

TIRE.Applyparkingbrakes.NOTE:

oved,applytheparkingbrakeon the

e.Assoonas thewheelbeingremovedis

t,blockfront andrearoffrontwheelto

gno availableparkingbrake.Placejack

masshownin figure51.Elevatejackuntil

nwheelto preventitsturning.Useahand

with3-footextensionhandleandloosenthe

vethe topandbottomnutssnugto

noffeight othernuts(fig.53).Raisejack

eely.Supportwheel,and removethe

per nut.Twomenliftwheelstraightoff

.Removethesixcapscrewsand

bcap,andremovehubcapandgasket.

elbearingadjustingnut,locknut,andlocking

ngnut.NOTE:Beforeremovingbearings,

perwithwhichto wrapthepartstoprevent

nd.Pullhub outaboutaninchandthen


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91/211

23(8-TON,4-WHEEL)

heelNutsTopandBottomNutsSnug

bearingcone.Removeoutercone.Re-

andgreaseseal.

M.Removethe10nutssecuringthe

esenuts areinstalledatassembly,using

en,useasocketwitha 3-or4-footexten-

m andhubassembly,turnthedrumon

weenthewheelstudscontactingtheground

thepull.Prydrum offstuds.Useawood

innerbearingconeanddriveoutcone

PS(fig.54).Sethubonend andclean

s(fig.54). NOTE:Insomehubsthedrift

nthesecases,the hubshavebeencastso

oundtheentirecircumferenceofthecup.

fhardwoodanddrivealternatelyoneach

erethe hubisnotrecessed,tapall the

ercase,guard againstcockingand


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92/211

23(8-TON,4-WHEEL)

okeShoeAnchorPins

aragraph36a(1).

efertoparagraph36a (2)andb

r.Refertoparagraph42a(2).

tlockingwiresecuringcamshaftcollar

screw(fig.67).Removebrakeshoereturn

etohingedownward.Hingeupperbrake

pullcamshaftstraightout.Pickup collar,

mshaft.Besurethatbracketbearing

ndproperlylubricated.Insertsplinedend

rtbracketin dustshield.Withcollarset

arbetweenthetwosupports,andpushthe


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EMBLY

^tfdHfl^^^VIANCHORPINNUT

^^^^__-

GPLATE

uenceFoundationBrakeAssembly

randon throughtheneedlebearinginthe

asfaras itwillgo.Locatethe milledsur-

haft,directlyundertheholeinthe cam-

screw.Securewithsafetywireasin fig-

eferto paragraph42a(3).

Refertoparagraph36d (1).

aragraph36 d(4).

paragraph41.

oparagraph36a(1).

efertoparagraph36a (2)and

efertoparagraph42a(2).

fertoparagraph42b(1).

toparagraph42c(d).

thetwonuts andlockwashers

ts.Pullbracketoffof boltsandoutof

mountingboltsareunserviceable,cut


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94/211

23(8-TON,4-WHEEL)

ng-to-drumClearance

d removethebolts.Ifserviceable,these

eednot beremoved.

Checkfitofcamshaftinbracket

racket.Iftootight,try anotherbracket.

inch,replacethecamshaft.Installbracket

ewithlockingwireasin figure68.Hold

eld,and placeholesinbracketflangeover

racketflangeagainstdustshield,andin-

shersandnuts,and tighten.

toparagraph42c (2).

efertoparagraph42a (3).

toparagraph42b (3).

mbly.Refertoparagraph36

graph36d (4).

ragraph41.

sandassemblieswhichwerere-

1)aboveandin theordershown.Then

ts,andinternal-toothedlockwasherssecur-

ingbeamflange,andremovethedust


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96/211

23(8-TON,4-WHEEL)

stShieldCamshaftInPlace

dustshieldonmountingflangeinthe

.Install theeightmountingbolts,internal-

nutsandtighten.Installbalanceofbrake

ubparagraphd(2)aboveand intheorder

.41).

eparkingbrakeis composedof

untedonanextensionofthe tworearair

handleverispulledrearward,it contacts

heslackadjusterarm andpullstheslack

gthebrake.Apawlandratchetmaintain

sition.

Applyparkingbrake.Useawood

sterarmandairchambertoretain armin

separkingbrakelever.Removethetwo

othedlockwasherssecuringbrakelever

rkingbrakeleverassembly.

.Blockslackadjusterasinsub-

onparkingbrakeleverassemblyasshown

drodtowardtherear.Install thetwo

ewithnutsandinternal-toothedlock


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97/211

TA.

keequipmentontheammunition

ontrolledpowerbrakingandisadaptable

tor,truck,or primemoversimilarly

soronthetowingvehiclesuppliescom-

ehosesto theairlines,reservoirvalves,and

(fig. 69).Theairchambersconvertthe

airintothe mechanicalforcerequiredfor

eofairstoragereservoirsand quickaction

cleandtrailerhelps keeptheairpressure

system.

emblyBendixWestinghouse

18

veBendixWestinghouse

53

ghouse

881

endixWestinghouse

882

endixWestinghouse

05

estinghouse

39647

est thetrailerairbrakesystem

tthetrailerairbrakesystemtothe airbrake

e engine,ifnecessary,tochargebothair

dsasr egisteredbythedashgageon the

and brakesreleased,observetherate

steredbythedashgageon thetractor.

sureshouldnotexceed3 poundsper

dbrakesfully applied,observethe

eregisteredbythedash gage.Therateof

dnotexceed4poundsperminute.


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23(8-TON,4-WHEEL)


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99/211

ers

abovetestsisthecombinedleakage

thetractorandthe airbrakesystemonthe

erair brakesystemmaybedeterminedby

heabovetestswiththe leakagefoundin

utcocksin thehoselinesconnectingthe

.

heabovetestsis excessive,checkall

orleakagebycoatingwithsoapsuds,and

ngdeviceorconnection.

pplythebrakesandchecktheir effec-

brakingresponseduringapplicationand

rakesonallwheelsapply,and release,

1,and72).

mployedin theservicelineand

er.Theirpurposeis totrapdirtor other

ghtgetintothelines, whentheyarenot

he towingvehicle.Bothfiltersarefastened

weldedtothe leftsideofthetrailer body

daheadofthe emergency-relayvalveto

thatvalve.>

1).Closetheserviceandemer-

roftowingvehicle.Removefilterdrain

sontowingvehicle,andallowairtoblow


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100/211

23(8-TON,4-WHEEL)

ctionalized

nstall

econds,

ocleanfilter,removethefourcap

asteningcovertobody,andremovecover,

ndstrainer.Cleanallmetalparts with

ainerisonlydusty,cleanit bybrushing.

sitispresent,replacethestrainer.Discard

erinbody.Placethenew gasketandthe

er.Installcoveron bodyandsecurewith

ashers.

rlineatbothsidesof filter,and

ittings.Removethetwo mountingcap

andremovefilter.


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101/211

assembled


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102/211

23(8-TON,4-WHEEL)

relayValve

erunderbracketwitharrowon

rearof vehicle.Installmountingcap

nstallnewsleevesonthetubing ends.

sleevesintobodyand tightenconnector

esapplied,coattheoutsideoffilter

sudsandlookfor bubbles.Noleakageis

rleak,replacethe filter.Ifthereis

ththecapscrewstight, replacethegasket.

ALVE(figs.18and73).

emergencyvalveconsistsofarelay

dedan emergencyvalve.Thefunctionof


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103/211

veistoactasa relaystationtocontrolthe

andto alsoautomaticallyapplythebrakes

clebreaksawayfromthe towingvehicle.

afetyfeature,therelay-emergencyvalve

the brakesbothduringapplicationand

emcharged,applythebrakesand

sapplyproperly.

ecktobesure airpressureispromptly

ortofthe relay-emergencyvalvethrough

emfullycharged,closethecut-out

eonthetractor,and disconnecttheemer-

Seethat trailerbrakesapplyautomatically.

cut-outcocksontowingvehicle

er airreservoirtoreleaseall airfrom

inesatthe valve.Pulltubingoutof

wthe removalofthevalve.Holdheads

ovenutsandinternal-toothedlockwashers.

ebolts.Removevalvemounting.

veonfrontsideof bulkheadand

ughmountingflangeandholesin bulkhead.

kwashersandnutsloosely.Usingnew

ndsinto theirrespectiveconnectors,and

onnectorbody.Whenallnutsarestarted

ghtenmountingboltnuts.Tightenconnector

cock.

ystemwithairandlisten forleaks.

oapsudsandlookfor bubbles.

VE(fig.74).

eckvalveismountedinthe exhaust

cyvalvetoprotecttherelay-emergencyvalve

tor water.

n.Useawrenchonthe hexagonal

moveor tightenthevalve.

theexhaustcheckvalve,and

hragmend,inwater.Checkforleakage

m.Noleakageis permissible.Ifvalve

nediaphragmanddiaphragmseat.Ifleakage

ofdirt, cleanthediaphragmanddiaphragm


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23(8-TON,4-WHEEL)

Valve

ya defectivediaphragm,replacethe

eatisdamaged,replacethecompleteex-

8).

rsupplylineatelbowconnectoron

ectornutatrelayvalve.Donot pullthe

Removenutsandwashersfromstrap bracket

vebolts.Rotatetankinloosenedbrackets

ntanktravelsdownwardawayfromthe

ndingtheline andfacilitatesreassembly.

ubingareseparated,movethetankrearward

straightout,awayfrombrackets.NOTE:

permittheremovalofreservoir,removethe

rackettothe sideofthebody,andremove

s,hold thenutsbehindthereservoir,and

etheboltsfrom insidethebody.

supplyline (fig.18)islooseat

w sleeveonthetubingat thereservoir.

rap bracketsandpushforwardasfaras

nfrontendof tankentersholeinbulk-

nuts,andwashersloosely.Rotatetank

nd sleeveintheelbowconnector.Continue

roximatelythepositionshowninfigure18.

servoirelbowconnectorloosely.Tighten

s.Tightenconnectornutsatreservoirand

75and76).

ndwrench,andscrewdraincock


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105/211

nCock

sassembled

xofdraincockina vise.Remove

andspringseatwasher.Removekey.

gtension.Inspectbearingsurfaces

essor scoring.Ifeitheroftheseparts

e,replacetbedraincock.

on.Installkeyinbody.Install

,andsecondorretainingwasher,and secure

tthe threadswithwhiteleadorshellac,

eservoirandtighten.

hair,andcoatthreads andbody

withsoapsuds.Noleakageispermissible.

67and77).

wer,chamber(fig.77)mounted

hend ofbothwalkingbeams(fig.67)

mpressedairintotheforceand motionneces-


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107/211

SectionalView

ectionalView

SectionalView

used.Ifconnectingtothefrontslack

dto thetopholein theadjusterarm.Install

new cotterpin.Closereservoirdraincock.

ystemwithairandcoattubing con-

atchforbubbles.Noleakageis permis-


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23(8-TON,4-WHEEL)

Disassembled

gUsingTool(41-C-2825)

.

ectedcoppertubing,withtheneces-

tocarrythebrakesystemair supplytoall

ptthewalkingbeams.Here,becauseofthe

blehosesareused.Alltubinghasanoutside

tthesupplyline fromtheemergency-relay


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109/211

onofTubingWith Tool(41-C-2825)

his lineisVi-inchoutsidediameter.All

ypeandareillustratedinfigures78, 79,80,

e repairunit,atubingunion,disassembled.

.Examinealltubingfordents and

swithdry-cleaningsolvent,andblowout

yswithcompressedair.Alwaysreplace

aceorrepairdamagedor kinkedtubing.

mentTubing.Alwaysmeasureold

ndcutthenew piecetoexactlytherequired

tubingcutter(fig.83)andsee thatthe

thandsquarelycut.Endsoftubing must

closed.Reamor filetubingendsifneces-

sectionof tubinginbothdirectionswith

allcuttingsorfilings.

dsleeveontubingand puttheend

inthetubing fittingbody(fig.85).Hold

andtighten nuttosealthe jointagainst

rytotighten thenutuntilsufficientpres-

vetopreventleakage.Alwaysuseanew

binglines.Tubing,fittingnuts,andbodies

edtheyarein serviceablecondition.


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110/211

23(8-TON,4-WHEEL)

ubing

cks(fig.86)areusedin theservice

thetrailer toprovideamethodofclosing

renot beingusedinatandemtow.The

thehandleis ata90 degreeanglewiththe

outcockisclosedwhenthe handleispar-

ock.Stopsareprovidedsothatthe handle

tsnormallyopenand closedpositions.

-outcocksbyhand.Neverstrikethehan-

suchheavyinstrument,asitwoulddamage

htdevelop.

oirdraincocktoreleaseairfrom

eatrearof cut-outcock,andpulltubing

Turnhandleto "OFF"position.Usean

frontofcut-outcock,andscrewcockoff

riveoutrivetpin attachingthe

offhandle.Removecapnutcoveringthe

iftoutspring.Removekey.

ofParts.Cleanall partsindry-

heoutsideofthekey,andinside boreof

oring.Leakagedueto slightridgesand

dingthekeyto thebodyusing(BWE

oundoritsequivalent.If leakagehasbeen

ng,replacethecompletecut-outcock.Do

anewkeyto anoldbodyorvice versa.


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111/211

rtsare thoroughlycleaned,apply

h thefingersontheoutside ofthekeyand

ody.Placethekeyinpositionin thebody.

puttingathinlayerof greaseunderthe

t contactsthebody.Tightencapnut

ositiononkeybeingsure thekeyis

handle installed,theprojectionatthe

operlyengagethe stopsonthetop ofbody

ons.Taphandledownon keysothatrivet

e rivetholeinthe handle.Driverivet

d ofitto makeitsecure.

tcockhandleto"OFF"position

lkheadconnectorwithwhiteleador

tcockontotheconnector.Useanopenend

ten,leavingthe cockpositionedsothat

tanew sleeveonthetubingendand

torinrearwardendofcut-outcock.

CTOR.

seandhosefittings provideameans

ectionsbetweenthepointsonthe trailer,


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112/211

23(8-TON,4-WHEEL)

AssemblySequence

yDisassembled

eirpositioninrelationtoeachother, and

wingortowedvehicle.Hoseassemblies

kesystemof thetrailertothe airbrake

ed,vehiclearefitted withhosecouplings

esincludedetachable-typehosefittings


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onnectorNutandSleeveOnHose

sketCovering


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23(8-TON,4-WHEEL)

GASKET

etInConnectorBody

edhasan outside

-M.

ninside diameterof

econnectornutfromhoseconnector

oseup andoffofconnectorbody.Screw

outofconnectorbracketedtotrailerbody

nentlyconnectedfitting.Unlessitis

ectorbodyinthewalkingbeamfitting,and

tdamage.

oseend,havingthe permanentcon-

ketedtothebody post.Pushtheother

oseguideinconnectorbodyonthe walking

y.

Hoses(fig.88).Removehose

ovenutfrombodyoffittingandpull hose

vesleevefromhose.Ifanewpieceof

eanewsleeve.Donot removehoseguide,


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BODY

eInConnectorBody

ofParts.Cleanallmetal partsin

ecthoseforabrasions,swelling,orother

ed,replacewithanew piece,anddiscard

s,nuts,andbodiesmaybe usedagainunless

esiredlengthbeing surethecutis

eoutsidewallofthe hoseandthattheend

woutthehosewithanair linetoremove

dsleeveon hose(fig.89)beingsure the

sleevepointtowardtheendof thehose.

eend oftheguidein thefittingbodyso

eprotectorcovering(fig.90)will benext

otectorcoveringfromthegasket.Usea

hgasketonintoconnectorbodymakingcer-

eat(fig.91).Put theendofthehose in

akingsure theendofthe hoseandthe

omofthe recessinthefittingbody.Move

ntilitis againsttheedgeofthe fittingbody.

.It isonlynecessarytotightenthe nut

dairtightjoint.


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23(8-TON,4-WHEEL)

wofHoseCoupling

Disassembled

.

ings(fig.93)provideaneasyand

necting,anddisconnecting,airlinesbetween

hosecouplingis suchthatwhentwoof

r,pressureisputon tworubbergaskets


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plingGasketIntoGroove

at thesametimeprovidingajoint which

ordisconnected,byhand.Allcouplingsare

maintainthemin theirlockedposition.

geable.

bly(fig.94).Screwthecouplingoff

oroffthebulkheadconnectorifattachedto

helockspringplug,lockspring andlock

.Discardoldgasketandcleanall

solvent.Examinefrictionlockspringand

ror damage,andreplaceifnecessary.

ouplingbody,giveparticularattentiontothe

geofthe hosecouplinggasketfits.This

oroughlyclean,otherwisethenewgasket

erly.

wgasket,partiallycollapsethe

ndenterone sideofthegasketflangein

sea bluntnosescrewdriverorsomesim-

epushingthegasketin place(fig.96).


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use#pd-google


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23(8-TON,4-WHEEL)

ingGasket

heexposedfaceofthegasketwill beflat

t anypoint.Withanewgasketinstalled,

ouplingis completedbyinstallingthefric-

BAXLE

TA.

ewalkingbeamisa weldedframe

ub.oscillatesonthecen

tm 9-793 m23 ammunition trailer

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