Tm 9-793 M23 AMMUNITION TRAILER
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NICALMANUAL
Publ
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NICALMANUAL
UGUST1944
TONOFRESTRICTEDMATTER
dinrestricteddocumentsandtheessentialchar-
aterialmaybegiventoany personknowntobein
atesand topersonsofundoubtedloyaltyand
atinginGovernmentwork,butwillnotbe com-
to thepressexceptbyauthorizedmilitarypublic
soparagraph23i,AR380-5,15March1944.)
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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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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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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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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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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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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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m-to-boomPoleLockingPin
omToProperLevel
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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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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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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
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_use#pd-g
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PIN
DLINK
NGBEAMFWALKINGBEAMINNERBUSHING
NTER
ricationViews(Trailer)
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_use#pd-g
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23(8-TON,4-WHEEL)
USHINGB OUTERCAMSHAFTSUPPORT
SPARINGLY(4FITTINGS)
ITTINGS)
SPARINGLY
NGS)
ricationViews(Trailer)
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S
ELEG
LGEARS
ricationViews(Trailer)
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23(8-TON,4-WHEEL)
ITTINGS)FWHEELBEARING(!FITTINGS!
icationViews,HeavyCarriageLimberM5
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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
.
VEMAINTENANCESERVICES
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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VEMAINTENANCESERVICES
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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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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VEMAINTENANCESERVICES
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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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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VEMAINTENANCESERVICES
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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VEMAINTENANCESERVICES
ng'ht
andbolt tight,
cesthissight/
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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23(8-TON,4-WHEEL)
mEndSupportedForWheelRemoval
00
O
899
4882
enumber)C67935
4O
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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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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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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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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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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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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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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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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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assembled
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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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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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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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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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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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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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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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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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23(8-TON,4-WHEEL)
ingGasket
heexposedfaceofthegasketwill beflat
t anypoint.Withanewgasketinstalled,
ouplingis completedbyinstallingthefric-
BAXLE
TA.
ewalkingbeamisa weldedframe
ub.oscillatesonthecen