Tm 5-9056 SEMITRAILER ACETYLENE CHARGING PLANT

7/28/2019 Tm 5-9056 SEMITRAILER ACETYLENE CHARGING PLANT

1/153

ECHARGING

FSPECIAL

SCOMPANY

W145ENG437)

COMPANY

O.W145ENG437

-98342(Trailer)

-98367(Dolly)

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icDomain,Google-digitized

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NUAL)^H 3

ACTERISTICS

........................._ ........____________ 3

........_ ........_____ 3

....................._______ .........._______ .......3

.........._ ..... 3

............_ ..... 4

......................-------......-------4

_____ ......_ ................_ .......4

...............--------...........4

____ ......_____ ................_________ ..- 5

S

railer..................._ .................9

emi-Trailer............._ .............10

Vehicle .......__________________ 10

wingVehicle-------------------10

_______ ......______________ ......_ .......12

ailer--------------.......................12

mbination...............______ .......13

TION ADJUSTMENT

Operation___________ ......._______ 17

........___ _ _ _________________ .......18

-----........... ......-------------18

..............18

MANUAL

---------21

.....................------------------------22

railer...............................-----------22

mi-Trailer......._ ......_ ...................24

Trailer ......--------------------------24

.....----------------------------...........25

ly...........--------------------------............27

.........................._......---------........27

....._ ................27

er................28

sisandRemedy............................29

_ ................30

................30

------------------30

..............31

.............33

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os.

37

9

ent39

agm40

e41

49

Brake49

haft50

aft50

mbly50

ssembly50

osisandRemedy51

ayin Hook_ 52

ingVehicle54

Spring _ 54

56

TowingVehicleService

lyServiceDiagnosisand

LIGHTS

mbly_--.60

ceLights61

sandRemedy63

ANDBOLTEDTO FRAME"PARTS

eMembers64

ers65

ember65


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ot.

olly.66

Trailer67

gSafetyChains70

ment73

5

emblyofPintleHook77

SleeveRemoval78

SleeveReplacement78

emi-Trailer81

ngSemi-Trailer82

84

olly84

4

angersSemi-Trailer85

pringHangersDolly86

osisandRemedy86

semblyAttachedtoI-Beam87

ngAssemblyAttachedto

gAssembly89

gAssembly90

dAxleAssembly90

dAxleAssembly91

92

m_ 92

heels92

ER

Carrierv 93

ement94

tchetReleaseHandle94

el94

iresandTubes95


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os.

DRUMS

BrokenStuds96

y97

97

98

9

on99

ST

DollyandTrailer 101

dTrailer102

ler103

dTrailer104

olly105

railer106

107,108

108

2

110

11l

12

ntleType)114

ON115,116

Dolly115

Trailer116

118

nism118

GENCY121

RUMS-DollyandTrailer122


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AcetyleneChargingPlant,Model

1

_ _ _ _ 2

Dolly_ 5

ghtSide_-..6

_ 7

_ _ 9

tedonTowingVehicle9

mi-Trailer_ 11

er. _ _...14

16

Dolly22

Semi-Trailer..-_ 22

Trailer23

mblyfromAxle_...24

-Trailer_ _ 25

6

_ 26

27

ber28

t30

rPins31

_ 32

_...33

32

s34

val_ _._ 36

ed38

onalView40

ssembly_...41

RodReplacement_ 41

e43

eRemovingTopCover44

eRemovingDiaphragmGuideRing45

eReplacingIntakeValve_ 44

eRemovingCap,Spring,andDiaphragm..45

eDiaphragmCoverBody46

eSpringandStrainer46

eRemovingLockNutFromValveStem..46

eValveStemandDiaphragm46

d_ 47

48

xploded_ 49

ly_ _ 52

olly53

wingVehicle55

-Trailer_ 57

_ 58

9

ssembly,Step160

ssembly,Step261

ssembly,Step3. _...62

er63


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66

PinAssembly68

nelandFrame74

nelScrews'.75

ss76

78

_ 79

80

-Trailer81

,Step182

,Step283

RodPin87

8

eBracket89

g88

hanism-Exploded89

ly_ 91

upportConnectingRods92

_ 93

mbly96

bly97

DollyandTrailer 101

andTrailer102

tsTrailer103

andTrailer104

Dolly105

Trailer106

lly107

wingVehicle108

eType)114

tionDolly115

tionTrailer116

_ _ 117

chanism1l8

ve_ 121

msDollyandTrailer_ 122


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EMI-TRAILERACETYLENECHARGINGPLANT


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LLYDC4.


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criptionandCharacteristics

ristics

N.Thistrailerisof thevantypeand

bepulledbehindanytypeof heavyduty

uippedwithasuitablepintle hook.Dollycan

trailerthusconvertingthetrailer intoasemi-

nthenbepulled behindatractor-truck

d2).Thistrailermaybe identifiedby

dy;theall-weldedconstructionoftheframe

edondual wheelsatrear.Itis normally

eldolly.

dnameplatesarelocatedonthemain

one onthesemi-trailerandoneon thedolly.

gnedforhighwaytravel.Itsabilityto

ndsonthetractiveabilityofthetowingvehicle

t istotravel.Maximumspeedis35 M.P.H.

semi-traileraxlesareoftheone-piece

ed,heattreated,chromemolybdenumsteel.

40steelwith a4"x4" squaresection.The

toaccuratelimits.Theaxles andwheelsare

ytaperedrollerbearings.Simpleadjustments

roughlarge castellatednutsandahardened

sareidenticalinconstruction.Dowelpin

%e"centers,topand bottomthoseindolly

redouble-anchor,two-shoe,heavyduty

heyhavea16"diameteranda 6"width.

kwithabrakingareaof 420squareinches.

edwitheccentricadjustmentinadditionto

haft.Thisslackadjuster providesfor360

aft.Thecamshaftbearingsare oftheself-

Actuationofthebrakesis byairchambers

brakingsystemincludesanair tankreservoir

.Ahandparkingbrake,takenoffthecam

uster,isalso provided.Trailerhoseconnec-

rontwithdummycouplingsfastenedtothe

emi-automatic.Baseis36"indiameter

Apick-uprampfastenedtothegearframe

osemi-trailer.

all-weldedstructuralsteeldesign

ollymainframe.Adroppedforgedeyeis


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risticsOPERATOR'SMANUAL

Thewiringsystemisthe6-8 volt

edat thedropinthe frameonthecurbside.

acity.Thelightingequipmentincludesstand-

ackoutclearancelight,acommercialstopand

light attached,blackoutstopandtaillight,

ratedblackoutswitch,andreflectors.A

enttothesemi-trailerthrougha socketon

umpercablesuppliescurrentfromsemi-

.a.Springhangersarecastmetal.

onzebushingsandare riveted,tosideofframe

and semi-trailer.Mainandauxiliarysprings

eavesarecuppedto protectthenicklesteel

sareattachedtothe axlewithtwoheavy

ngsareshackledatbothends,thusproviding

outdangerofbreakage.

ameteronsemi-trailerandl1/^"ondolly

eyaregroundto accuratelimitsandare

ation.

nisequippedwithtworadiusrods;oneis

bleonsemi-trailer.Bothradius rodsare

diusrodson semi-trailerarerubbermounted

dollyarerubbermountedataxleend only.

ecarrierislocatedontheleft sideof

otrudesthroughaholein skirtingofthebody

udnutsonthe sparetireandreleasingthe

e canbeloweredtothegroundwith theaid

dle.

Wheelsare20x9-10Buddon boththe

reinterchangeable.Tiresare12.00/2014

-trailer.


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olsareemployedaccordingtotheusual

practice.Thedrivermustbecomethoroughly

nduseof allcontroldevicesbeforeattempt-

and4).Twoblackoutswitchesare

smemberofdolly,andoneon bodypanel

r.Thereisno "off"positionontheseswitches.

ARVIEWDOLLY.

ut"positionorat "standardlight"position.

meansofascrewdriver,coin,key,oranyother

rrentis controlledatthetowingvehicle.


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LLVIEWRIGHTSIDE.


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Alockisprovidedto preventdrawbar

ckedonlywhendollyis beingtowedalone.

olly whencoupledtothetrailerwiththe

AWBARLOCK.

e(Fig.6).Couplerismountedon

khandleison therightsideof thecoupler.

nlockthecouplerhookwhichpermitsdolly

msemi-trailer.Theunlockedhookautomati-

enthedollyisbackedunderthetrailer.


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NUAL

dlemountedontoicingvehicle(Fig.7).

efromthesemi-trailer,pushbacktheoper-

the latchdropinbehindthel ugonthe

ngerin theunlockedpositionuntilthe

n.Duringthisoperationtheentiremech-

pling.

ehandbrakeis locatedattheextreme

ngthebrakelevertowardtherear, the

ndbrakecanbe usedasaparkingbrakeor

ckbrakes,whenslowlydescendingsteep

nd 8).Thisunitisequippedwith

he centerofthetrailerat thefront,oneon

hedollyframe,andone attherearof unit

ercableconnectionbetweenthesesockets

owingvehicleforeitherthe dollyorthe

nyvehiclewhichmaybe towedbehindthe

portsaremanuallyoperatedbyadetach-

dthroughholein theskirtingontheright

ybe loweredorraisedbyturningthe crank.

dpriorto disconnectingtractor-truckordolly.

pportor crankshaft,preventssupportsfrom

onwhenunit isinmotion.

ecarrieris locatedontheleftside of

ngshaftprotrudesthroughskirtingof main

utsfromsparewheelandtire assembly;and

twiththesquare endofwheelwrenchand

anbereleased.Thetire canthenbelowered

etiretothe carrier,fastenthesaddletostud

aft untilropehaspulledtire uptocarrier.

4 and8).Thesemi-traileris

brakecouplings,twoat therearofunit,

eincenterof traileratthedrop inthe

r issuppliedtodolly andsemi-trailerand

esemi-trailerthroughthesecouplings.Each

dummycouplingtopreventforeign matter

systemwhenairhoses arenotcoupled.Shut

he tworearcouplingsonthesemi-trailerand

uplesemi-traileranddolly.Thisarrangement

toff theairpriorto disconnectingairhose.


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EMI-TRAILER.a.Beforeattempt-

trailerbe surecoupleriscockedforcoupling.

shingbacktheoperatinghandleuntil latch

hindlugon theplunger.

ke onthesemi-trailer.

lerso thattheupperkingpin,which

5thwheelplateon thetrailer,iscentered,

fthelower5th wheel.Continuebackinguntil

ytothe kingpin.

SITION

OLLY

OLLYCOUPLER.

OUPLERMOUNTEDONTOWINGVEHICLE.


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ver'sInstructions

head.Ifcouplingiscomplete,movement

melydifficult.

ction.Ifthe5th wheelhooklockhandle

hehookleveris practicallyatthecenterline

sproperlycoupled.

trailer.Careshouldbetakentobe

oseconnectioniscoupledupwiththeservice

ergencyairhosewiththeemergencytrailer

er connectionsaretagged.Openairvalves

mpercable.

the supporthandleinaclockwise

eached.Insertsupportshaftlock,andcover

keonthe semi-trailer.

ROMSEMI-TRAILER.a.Setthe

r.

etweentractorandtrailer.

es.Breakingtheemergencyairlinefirst

mi-trailerbrakes.Makesurethatalldummy

donthetrailer andthattractorhosesare

minatingthedangerofdirtor foreignmatter

m.Disconnectlightjumpercable.

handleoncoupleruntil thelatchcanbe

elugonthe plunger.Plungerwillthenbe

onuntil tractor-truckiswithdrawn.

parkingbrakeonthetraileris setand

elydown.

eaduntilthe twounitsareseparated.

OWINGVEHICLE.a.Withthe

sitioncoupledrawbareyetopintlehook

ollybehindthe tractoralonewiththe

position.

ght handsafetychaintotheeyeon left

otcrossthechainsover orunderdrawbar.

ughopeningatfrontof drawbareye(Fig.5).

nwiththeotherchain,couplingit totheeye

antthatsafetychainsbecoupledas

plingsafetychainsinthatmannertheywill

dpintlehookon towingvehicleletgo.

etweenthedollyandtowingvehicle.

oved.

ROMTOWINGVEHICLE.a.When

hecouplinginstructionsoutlinedinthepre-


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TVIEWOF SEMI-TRAILER.


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ATOR'SMANUAL

RAILER.a.Coupledollytothe

ollyuptothe frontoftrailersothat the

rtedunderthetrailer.Besure kingpinon

yso, withthejawsoflowerfifth wheel

ock(Fig.5)andput thedrawbarlock

osition.Installpinin thedrawbar.Thiswill

ked"position.

certainwhetherornot hooklockisin

Pulloutonhooklockhandleto unlockhook

ke onthetrailer.

erhookengagesking pinonupper

f couplingiscompletemovementof

difficult.

betweentowingvehicleandtrailer.Be

CE"onthe tractoriscoupledtorightside of

vesat rearoftowingvehicle.Coupleair

erand openairvalve.Couplethelight

lerandtowingvehicle.

stopisreached.

ngtheparkingbrakegivecouplera

certaintraileranddollyare properlycoupled.

e"up"position.Makecertainsupportlock

aftport isclosed.

ROMTRAILER.a.Applythepark-

erthesupportwheelsuntil thestop

etweendollyandsemi-trailer.Disconnect

ycouplertoairlinecoupler.

e.

esattherear ofthetowingvehicleand

s.

nectingairlinesdonotallowthemto

themto thecabofthetowingvehicleand

theair linecouplers.

ndleandhookwillrelease.In caseit

hookhandleto the"rightsideoftrailer using

ymaybeencounteredwhenuncoup-

unctionalpartsof thecoupler.Thetrouble

erkingpin isbindingonthe hook.Thisis

actorbeing asfarapartas possiblewithout


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ver'sInstructions

Allthatisnecessarytoovercomethedifficulty

ndon thehookhandlepriortouncoupling.

rtrailertothe pointwhererampson

chesundersemi-trailer.Placethedrawbarin

dollyforwarduntilthetrailer anddollyare

ERCOMBINATION.a.Thetruck

therasatruckand semi-trailerorfulltrailer

uchthesamemannerasthestraighttruck.

ver,shouldprovehelpful:

cetotesttheoperationof thetrailer

tofull operatingspeed.Checktheairsupply

uldnotbelessthan 60Ibs.forproperappli-

ghtsshouldbetested.

careshouldbetaken toallowforthe

heelsturn"inside"theturningcircleofthe

ractor-trailerisa "hinged-in-the-middle"unit.

kshouldbesteeredin theopposite

iredthatthetrailerbe turned.

dbe appliedincoordinationwiththe

akesshouldnotbe expectedtocarrythe

busewillresult inrapidliningwearand

e trailerbrakes.Thefollowingbraking

ed:

eapplied easilyandreleasedwhen

ake isnotoperatingwithmaximumefficiency.

ciency,keeptiresjustshortoftheskidding

rfor anextendedperiod,setthehand


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GREASE,GeneralPurpose

pose

0)

SEMI-TRAILER.


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RYMONTH

RY5MONTHS

SEMI-TRAILER(Continued)


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rpose

)

pose

RYMONTH

RY5MONTHS

DOLIY


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ustment

TTATInspectionLubrication

Adjustment

ENINOPERATION.a.Purpose.

alefficiency,itisnecessarythatvehiclesbe

atintervalsinorderthatdefectsmaybediscov-

theyresultinserious damage.

astingsor othermetalpartsmayoften

pletionofarun, throughthemediumofdust

angesindesignpromptedbychronic

nit orgroupofunits;pertinentchangesin

emethods;andchangesinvolvingsafety,

omfortshouldbeforwardedthroughtechnical

evelop.Suchactionis encouragedinorder

ayprofitthereby.

(1)Checkdrawbartomakesureit is

oupledtosemi-trailer).

n andcasinginjuries.

dardandblackout.

ment.

eris properlyhookedandlocked.

ockedinthe"up"positionandthat

noperatingshaft.

dowsto makecertaintheyareclosed

strumentpaneltomakecertainitreads

keapplicationstomakecertainbrake

properly.

operlycoupledtopintlehookandthat

fastened(whendollyiscoupledto semi-

omakesureit isinthe fullrelease

tion. (1)Duringoperation,thedriver

nusualsounds,noisesordrivingcharacter-

rmalfunctioningoftheunit.

lcircumstancesshouldatrailerbeoper-

oublehavebeenobserved.Whenin doubt,

pedandassistanceobtained.Inspectionduring

tirevehicleandshould beemphasized

ructionperiod.


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MANUAL

Ateachhaltthe operatorshouldmake

ehicletodetermineitsgeneralmechanical

etectedduringthemarchtogetherwith

haltshouldbecorrectedduringthe halt,and

ehicleshouldbe madesothatunnecessary

majorfailureprevented.

on.Attheconclusionoftheday'soper-

bemadesimilarto thatmadeathalts,but

ed.Theinspectionshouldbefollowedby

defectscannotbecorrected,theyshouldbe

hiefofsectionor otherdesignatedindividual.

dbecovered:

ghangers.

bruisesandforimbeddedobjects.

htenloosestudnuts.

edwelds.

tire;securereplacementifnecessary.

ereserveair tankbymeansofthepet-

nk.

cation.(Seelubricationcharts.)

ailerandcouplermountedontowingvehicle.

usethetrailerhasveryfewwearing

keptto aminimum.Moreover,thetraileris

yingtoolssuitableforgeneralcare,mainte-

Accessoriesshouldnotbeusedforpurposes

ndwhennot inuseshouldbe storedinthe

vided.

withthevehicleareillustratedin(Fig.

versuppliedwiththisvehicleis notillustrated.


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afetyInstructions

S.a.Beforeworkingonthewheel

esofthisunit, itisstronglyrecommendedthat

efollowedatalltimes.

airsondolly,do notattempttohoist

ollyattached,rather,uncoupledollyfrom

erwithahoist, neverconnecthoistchain

e;usebullringsat thesideofunit orcouple

eof upper5thwheelplate.

partofthe supportsunlesssemi-trailer

ngvehicle,orproperlyblockedupatfront.

kingspring repairs,whenjacksareused,

dorothersuitablematerialwhichwillmake

entingjackfromsinkinginto ground.When

suchaposition thatnoslippagecantake

ndertrailer whentrailerissuspended

placedundertrailer tocatchtheloadshould

eboltsorpins, donothitthem witha

ehardenedandchipvery easily.Flyingclips

Useacopperhammer,orplacea pieceof

useitasa buffer.


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N.Dollyandsemi-trailerareidenti-

nterchangeableprovidingdowelpinholes

owelpinlayout(Figs.12, 13).Checkingfor

d,alldisassembly,reassemblyandmaintenance

unlessotherwisestated.

PINLAYOUTDOLLY.

PINLAYOUTSEMI-TRAILER

TRAILER(Fig.14).a.Placetwo

undertherearcrossmember.Jacktheunit

d bodyrestsonjacks.

licjackunder centerofaxleandremove


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ALSEMI-TRAILER.

lefthandsideofaxleand tapU-holtplate

assembliesfromrightandleft sideof

dnutsfromupperand lowershacklebolts

ngs.

wershackleboltassemblies(Fig.14).

outshackleassembly,stayclearof

ngwillfallto ground.

sandremovethe U-boltspacercap

aryspring.

ltheU-boltsforwardat anangleof

out inordertosecureclearanceunderthe

ke chambers;removeparkingbrake,

ackadjuster.

ndpull axleassemblyout.

wowoodhorsesandstrip theaxleofall

emovingtheboltsholding thebrakechambers

xle.


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NUAL

RAKEASSEMBLYFROMAXLE.

andbrakeassemblyandan"R"on the

entificationwhenreassembling.Removethe

gouttheeight boltsholdingbrakeadaptor

geonboth sides(Fig.15).Liftthecomplete

EMI-TRAILER.a.Replacement

ovalinstructionsoutlinedinparagraph2,

emakecertaindowelpin holesare

omofaxle(Fig.13).

areinstalledin thedowelpinholes,and

inandauxiliaryspringchairareplacedover

axlebeinstalledwith topsideup.There

hin theaxleinstalltheaxlewiththis

heelassembliescheckaxlealignment

aphb,thissection).

MI-TRAILER(Fig.16).a.Jackup

n rightsideandtheother onleftside,under

assemblies.

surethedistancefromkingpintocenter

esoftrailer.Distancefromking pinto

axlespindleonrightside oftrailershould

esamedistanceontheleft side.

,use theadjustableradiusrod.Loosen

rodandturnthe hexadjustingnuttoeither

cebetweencenterlineofrear axleandking

distanceisonewhichis%"shorter,king pin

ontherightside thanontheleftside. Center

theoutsideofthespindle.


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ENTSEMI-TRAILER.

Y(Fig.17).a.Fastenchainhoist

blespreadchain.Placeamobilejackunder

assemblies.

echambers.

dtapU-boltplatesoff U-bolta.Hoist

clearU-boltsand pullaxleassemblyout.

oodhorsesandstrip theaxleofallbrake

ngtheboltsholdingthe brakechambersand

andbrakeassemblyandan"R"on the

entificationwhenreassembling.Removethe

gouttheeight boltsholdingbrakeadapter


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LDOLLY.

ENTDOLLY.


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geonboth sides(Fig.15).Liftthecomplete

DOLLY.a.Replacementofaxleis

uctions(paragraph5,thissection).

emakecertaindowelpin holesare

ig.12).

areinstalledin thedowelpinholes,and

ngchairisoverdowelpin inaxle.

enchwithabout36"leverage.It isvery

bedrawnup extremelytight;strippingof

dwheelassembliescheckaxlealignment

.

LEFORBEND.

LY(Fig.18).a.Placedrawbarin

rkin centerofeyeoneinchbackfrom

assemblies.

surethedistancefromcenterpunchmark

d ofaxlespindleonboth sides.Themeas-

al.

ired,usetheadjustableradiusrods

onthe rodandturnthe adjustablespacer

atsideforwardorbackwardasrequired

menthasbeensecured,tightendownthe

leradius rodtofixthe axleinposition.

END(Fig.19).Procedureforcheck-

aileraxleisidentical.

positiononfrontsideof axle.

end ofthegaugeheldfirmlyagainstthe

ustthedoubleprongson theotherendofthe

einnerandouter bearingsurface.


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LEFORCAMBER.

ertothe rearsideofthe axle.Ifeither

makecontact,abentspindleis indicated.Use

ethe amountofthebend.Ifit isinexcess

onespindlerevealsnobendin theaxle,

dandchecktheotherspindlewithoutdis-

prongs.

eitherbearingsurface,checkwithafeeler

contactatbothpoints,theaxle isnotbent.

AMBER(Fig.20).a.Setthepoints

tlythesamepositionontheaxleand inthe

n(paragraph8,sub-paragraph6,this section).

underthe axle.

weentheinnerprongand thebearing

dnotexceed.080orbelessthan.060.I f

oper limits,replacetheaxle.


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osisandRemedy

ECAUSE

ng."

s).

.

ofadjustable

d 7,this

ustbearings.


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gpartswhichareattachedtotheaxles

eendollyandsemi-trailer.Allmaintenance,

andreassemblyinstructionsareidentical.The

chisboltedto semi-trailermainframe,oper-

dollybrakemechanism.Therefore,through-

nstructionswillapplytobothdollyand semi-

EADJUSTMENT.

MENT(Fig.21).a.Jackupwheel

hichis attachedtoslackadjusterina

hewheelcannotbeturned.

wrenchofftwonotchestryturning

ebrakesareproperlyadjusted.Shoulda

kingoffonthe wingwrenchnutuntildragis

MENT.Theinstructionswhichfol-

ningsor drumshavebeeninstalled.

anchorpinssothatthe anchorpins

2).

rumassembly.Ifit failstomoveon

kadjustersthroughcounter-clockwisemove-

wingwrenchandcentralizeanchorpin


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RAKEANCHORPINS.

,turntheslackadjusterwingwrench

retightin thedrum.

orpinto rightandleftasyou tightenup

he brakeshoesarecentralizedinthedrum.

theclearanceat.010attheeccentric

ndofthebrakeshoes.

anchorpinswhileholdinganchorpins

rench.

ION(Fig.23).a.Visualinspec-

ngs canbemadewithoutremoving'wheels

ovethetwodust shields,whichareboltedto

capscrews(Fig.25).This exposesthe

gthicknessandgreaseonthe lining.

sonall brakeshoesbeofthe same

edbraking.


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NSPECTION.

REMOVAL


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ease-soaked,allfourbrakeblockson

ed.

brakeliningsurfaces.Thisprocedure

dforliningsto acquireburnishedsurfaceso

aking.

OFLINING.

NG(Fig.24).a.Removethewheel

unit.

rytoremovethebrakeshoesfromthe

cessary,however,toremovethedustshields

gbrakeliningto theshoes.

romthe surfaceofbrakeshoes.

certainthat theboltsholdinglining

enedandthat lockwashersareused.

loosenthe twoanchorpins(Fig.22).

eelyandeasily.Itis essentialthattheanchor

e majorbrakeadjustmentcanbeproperly


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BLY.

RAKESHOES.

usinga lightgradeofengineoil ora

searoundthe"S"portionof cam.

brakesin accordancewiththeMajor

ure(paragraph5,thissection).


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moval(Fig.26).(1)Removethethree

nbracketto thebrakemountingplate.

cketfreeoftheanchorpinsand pull

chorpins (Fig.27).

ereturnspring byremovingthebolt

procedureoutlinedaboveaftercleaning

;spreadathin coatofgreaseoverboth.

EachshoehastwoOilitebushingsat

acewornbushings:

ng.

Drivenewbushingsin withcareasa

shingwillretardfreemovementofbrake

andrelease.Thesebushingscomereamedto

ver,ifreamingisnecessary,reamto1%"dia.

llers(Fig.26).Thebrakeshoeroller

cebyashaft fastenedbythreeheavyprick

Rollershaftsmaybe drivenoutandrollers

gtheshoesfromtheassembly.

lacingcam.Camscomeinrightsand

m,careshouldbetakentoplacethe proper

msare stampedoninnerendwitha num-

odd numberisleft.

LY.


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OD

TERREMOVAL.

bassembly.

asheratthe slackadjusterendofthe

mslackadjusterarmand tapslack

nddriveout thecam.

eedlebearingswitha mediumlight

reaseintobearingswithfinger.Holdthebrake

in position.Careshouldbetakennotto


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rake.

nthe mountingplatebrakeadapter.Reverse

ove.

earings.-Camneedlebearingswill

roperlylubricated.However,iftheyare

nt,orinremovingandreplacingcam,'proceed

gsineachmountingplate adaptor

tone timebydrivingthemoutwith a

earingsinto positionandtapgentlyto

dagainstboth brakeadaptorandbear-

sintopositionwithaC-clamp.Bearingsshould

gesoftheadaptor.

aringsdo notcoverlubricatinghole.

ingincambracket. (1)Removethe

5,sub-paragraph2,thissection)(Fig.28).

ecambracketandtheball bearing

ealemitefitting,insertasmall screw-

holeandpryoutwardagainstthebearing.

kadjusterbracketwithasmallhammer.

.Slackadjustersareinterchangeable

ailer,andfromrightto left.

a)Disconnecttherodsat slackad-

,lockwasherandflatwasherfromcam.With

slackadjusteroff thecam.

(a)Placeslackadjusteronsplineof

djustingwrenchtowardsthefrontof unit.

washerandnut.Turnthe wingwrenchto

usterwithholeinbrakechamberpushrod

greaseonyokepinandinstall pin.Ifworking

andbrakerodin thetopholeofslackad-

fbrakechamberinthecenterhole.

antthatthebrakebegivena minor

ckadjusterhasbeeninstalled(paragraph2,

STER(Fig.30).a.Ifturningup

wrenchfailsto bringthebrakeshoesup

mor wormgearisusuallywornor stripped.

ceedasfollows:

ormgear. (a)Removetheworm(1)

erbyturning outonthehexnut holdingitin


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TEREXPLODED.

sstripped,replaceitas anassembly.

ondition,prythelockring (2)free

emovetheshield (3),felt(4)and worm

sstripped,replace.

er. (a)Driveoutthe oldbushing.

OVAL.


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rakes

AL.a.Brakedrumsshouldbere-

adlyscored.Heatchecking,unlesssevere,does

acement.Brakedrumsmaybemachined

originaldiameterwithoutnecessitatinguseof

andlining.Ifnecessaryto machinebeyond

beusedbetweenliningand shoetomaintain

bassembly.

edtohub flangebysixbolts.Remove

heelassembly.

utsand lockwashersandliftdrumoff

EMENT.a.Checkdrumpilotto

mrustandallforeignmatter.

ot,makingcertainit isdownonpilot

kwashersandnuts.

positenutstobringdrumdownevenly,to

naxleand makemajorbrakeadjustment

.

g.32).a.Thisunitisequipped

Theyareallinterchangeable.

nofthebrakechamberistoconvertthe

ntothemechanicalforcenecessarytoexpand

ebrakedrum andapplythebrakes.Airpres-

yvalveentersport(1)behind theflexible

evelopedmovestheflexiblediaphragm,

nd attachedpushrod(6),soas torotatethe

rakes.

rokeofthe brakechamberpushrod

akemustbe adjusted(seeBrakeMinor

ushrodstrokewithin thecorrectlimits.The

mittedtoexceed1%"andwhen thebrakes

ouldbeas shortaspossiblewithoutthebrakes

trokeisusuallyabout%".

amber,slackadjustershouldbeso

d(6) tolineupwith brakelever.Donot

hinonrod (6)toalignwith brakearm

ningslackadjusteradjustingnut.

eairhosefromchamber.

keysandnuts fromchamberstuds.

andclevispin frompushrod,andlift

brackets.


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ementofchamberisinreverseofremoval.

ortin chamberisup.

PHRAGM.a.Chamberdiaphragm

verytwoyears.

eaksin thebrakediaphragm. (1)

aphragmwithsoapywater.

soapywater,a 3-inchbubbleinthree

tightentheboltsuniformlyaroundthe

ars.Nevertightenthebolts tothepoint

hragmstarts tobulge,inasmuchasthis

ragm.

ective,airwillescapearoundthe

d whenthebrakesareappliedandthe

edasfollows:

movethebrakechamberfromthetrailer

bernutswhichholdit tothemounting

rhoseassemblyandpulltheclevispin atthe

viseanddrawanail orothersharp

redgetomarkit forreassembly(Fig.33).

acethediaphragmandtightenbolts.

BERSECTIONALVIEW.


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BERPUSHRODREPLACEMENT.

BERDISASSEMBLY.

bersprings,pressureplate,rods,boots.

utlinedaboveforthedisassemblyof

hrodand installthenewspring.Make

roperlyonpushrodplate (Fig.34).

ates shouldbereplaced.

hrods maybestraightened;ifseverely

replaced.

ALVE(Fig.35).a.Function.The

vesasa relaystationtospeedup theapplica-

erbrakesandalsoprovidesa meansofauto-

erbrakesincasethe trailerbreaksaway

onistooperatesoas todeliverandmain-

inthetrailerbrakechambersas thebrake

rsto it.

heoperationoftherelay-emergency

eair pressuredeliveredtoitbythe brake

sdeliveredto therelay-emergencyvalve

dentersthe cavityabovetherubberdia-

ecausethiscavityissmall and,therefore,

nairpressure,the actionofthevalvein

ssureisalsovery rapid.

relay-emergencyvalveassumesthree

eration.Thesethreepositionsarethe:

enthevalveisactuallydeliveringair

mbers.

nthevalveismaintainingorholding a

akechambers.


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NUAL

henthevalveisreducingorreleasing

rakechambers.,

valveisso arrangedthatitcanassume

eEmergencyPosition.Themechanismonly

nsomeabnormalcondition,suchasatrailer

pintheairpressure inthetraileremergency

ns,thevalvepermitsfulltrailer reservoir

railerbrakechamber,applyingthetrailer

me,preventsloss oftrailerreservoirpressure

emergencyline.

achof thesepositionisasfollows:

airpressurefromthebrakevalveonthe

servicelineon thetrailerandentersport (1)

hgm(2),thepressuredevelopeddepressesthe

mthussealstheexhaustport(3) under-

tscenterisdeflected,forcingthediaphragm

top ofsupplyvalve(5).Continuedmove-

veoffits seatandpermitsairpressurefrom

ngport(6),to flowthroughcavityA,past

outport(81)to thetrailerbrakechambers.

oonastheair pressurebeingdelivered

alsthepressurebeing deliveredtotherelay-

rakevalve,thepressureaboveandbelow

andthe centerofthediaphragmliftsand

n.Thispermitsthe supplyvalvespringto

ngtheair pressurebeingdeliveredtothe

hesamepressurebeing deliveredtotherelay-

actorbrakevalve.Inthisposition,actionof

ragm(2)makestheouteredgeof the

stport(3).Thusthe valveisinits Holding

ameairpressurein thetrailerbrakecham-

thetractorisdeliveringtoit. Ariseinbrake

sameactionuntilthehigher pressureinthe

milarlyestablished.

hebrakevalvepressureabovedia-

trailer brakechamberpressurebelowthe

epressureabovethediaphragmandthedia-

is opensexhaustport(3)permittingthe

kechamberstoexhaustuntilalowerbalanced

brakevalve pressureontopofthe diaphragm

ay-emergencyvalvealsoreleasesallpressure

mbersthusfullyreleasingthe brakes.

Thetraileremergencyline,connectedto

gencyvalveisdirectlyconnectedthroughthe

etractorreservoir.Anysuddendrop in


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RGENCYVALVE.

ergencylinewillcausetherelay-emergency

positionandapplythe trailerbrakes.Nor-

reis presentaboveandbelowtheemergency

ndrop inpressureinthe traileremergency

appedabovediaphragm(10)forcesitsouter

ntingthefurtherlossof airthroughport(9)

ine.Thispressurealso depressesthecenter

gthesealat (12)andclosingtheemergency

fromthe trailerreservoirthroughcavi-

8) tothetrailerbrakechambers,applying


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erbrakesare thusappliedautomatically,

emergencylinepressure.

onditions,itsometimeshappensthatthe

reservoirwillfallbelowtheair pressurein

differenceinpressuredevelopstoasuffi-

n howanundesiredemergencyapplication

uardagainstthis,apressureregulatingcap

y.Thevalveinthiscapnormallyremains

ureisabove70to 80pounds.Thispermits

m(10)toequalizewithpressurebelowthe dia-

ssureisabove70to 80pounds.However,

elowthis point,thevalveinthepressure

eventinganyfurtherequalizationofpressure

opin pressurebelowdiaphragm(11)will

trailerbrakeapplication.Thusifleakage

kesystemor thetraileremergencylinebe-

ompressorandsuchleakagecausestheair

kesystemto dropbelowasafelimit,the

aticallyappliedtostop bothvehicles.

-

G

GENCYVALVE-

V.

agms(2)and(10) shouldbereplacedonce

hragm(2),(Fig. 35):

mlyinavise,removetop cover(A).

guidering(Fig.37),removecotter

gtbediaphragmto theguide.Liftoutthe


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GENCY

HRAGM

GENCY

SPRING,

theprocedureoutlinedabove.

kevalve(5).(Fig.35.)

thapair oflongnosepliers.

hragm(13).(Fig.35)

ngcap,springanddiaphragm.

tdiaphragmanddiaphragmfol-

dreplace.

ngtheprocedureoutlinedabove.

aphragm(10)andwashingstrainer

verbody(Fig.40).

ner(Fig.41).

g.35.)Insertscrewdriver intoslot-

vediaphragmlocknut(Fig.42).Pullout

agm(Fig.43).

diaphragmincleaningfluid.Installa

ry.

ngtheprocedureoutlinedabove.

Thecompletevalveshouldberemoved

d,thoroughlycleaned,anddiaphragms(2)

dat leastonceayear.

ovedandcleanedin cleaningfluidabout


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RGENCY

ER

RGENCY

AINER

RGENCY

RGENCY

KNUT

(1)Withbrakesreleased,cover

s.Leakageiscausedby supplyvalve(5)

verexhaustportwithsoap suds.Leak-

m(2)not seatingproperly.

s(Fig.35). (1)Withfullpressurein

nnectemergencylinebetweentractorand

dapplyautomatically.Thisfeatureshould


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osecouplingat frontoftrailerwith

kage.Leakageiscausedbydiaphragm(10)

.

gencyposition,coverexhaustportwith

essofthat evidentintestoneis causedby

rly.

tswithsoapsuds,a3-inch bubbleinthree

akagemaybecausedbydirt onthevalves,

ordiaphragmseatsandmaybecorrectedby

ausedbyworndiaphragms,valves,orseats.

bereplaced.Wornvalvesorvalveseats

ngwithBendix-Westinghouse(Grade1000)

sthewearisexcessive.Ifsuch procedure

e,thevalvesandvalveseatsshouldbereplaced

replacedwitha repairexchangeunit.

Whenairlinetubing becomeskinked

gedsectionandsplicein anewone,using

usesleevetype%"tubeunion.

Replacementofpackingrings.Hose

hrubberpackingrings whichactasgaskets

me,usuallyaboutayear,thesebecomeworn

replaced.Simplypryouttheold packing

s.

rspreventstheentranceof foreignmatter

heyshouldbeused wheneverthehosesare


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on(Fig.44).Airfiltersaremounted

ermainframe,towardrearof unitnearaxle,

doneinemergencyline.Filteris designed

oilfrom air,therebyincreasingthelifeofthe

ergencyrelayvalve.

stmentsarenecessary.However,filter

000miles.Drainingof filterisaccomplished

mof filter.Thefiltershouldbedisassembled

leaningfluidevery 5,000miles.

onnectthelinesleadingintothe filters.

ingfilterto bracket.

rews(1)holdingcup (2)touppersec-

cup,separatingcupfromuppersection.

(3);removecleanerseat(4)and pull

blyisinreverseof disassembly.When

esuretoinsert itinthegrooveprovided,in

SEVALVE.

VE.a.Operation.(I)Quickrelease

ramebetweenthebrake chambers.

eis operatedbyairpressurefromthe

hecavityabovethediaphragm.Asthe air

itforcesthe exhaustseatofthediaphragm

xhaustport,sealingtheexhaustandpermitting

brakevalvetopasstothe brakechambers.As

the airpressureandtheforceof thespring

ngtheexhaustseatfromthe exhaustport

ureaccumulatedinthe brakechambersto


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ybrakes,coverexhaustport(opeaonly

ds todetectleakage.Athree-inchbubble

missible.Leakageiscausedeither bydirton

lveseatorbya wornexhaustvalveseat.Dirt

bycleaningtheexhaustvalveseat.However,

ornexhaustvalveseat,replaceentirevalve

vecanbedisassembledwithoutremoving

cover,removespring andliftvalveassembly

E.a.General.Thehandparking

htsideofsemi-trailer,aheadofthe rearwheel.

llingthelevertowardtherear ofthetrailer.

GBRAKEEXPLODED.

KINGBRAKE(Fig.47)._

rakerequireslittle attention,theminor

areofparkingbrakeadjustments.However,

quired,itconsists,essentially,ofshortening

holeoftheslackadjuster arm.

B)on brakerodandturnclevis (2A)so

ut1/4".

lackadjusterarmandturn wheelswith

off"positionto determinewhetherthey

yindicates thatthebrakerodhas been

ouldbeadjusted accordingly.

lstill turnsfreely,settheparkingbrake

holdfirmlyshortenthebrakerod until


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NUAL

OSSSHAFT(Fig.47).a.Disconnect

)atthelevers(14).

brakerod(3).

oldingcrossshaft journals(9)toframe,

embly(21)out.

olts(15) intwolevers(14)and (18).

collars(7)andtapthe twocollars(7)

nd18)offshaft(21).

SSSHAFT(Fig.47).a.Reassembly

eofdisassembly(paragraph21,thissection).

antthatcrossshaftworksfreely.Be-

C,2and 3)testtheoperationof thecross

andcross shaftassemblyforwardandback-

nda dragisfelt,tap thejournals(9)for-

crossshaftworksfreely.

ods,placealight filmofgreaseonthe

tjournals(9).

stment(paragraph2,this section).

ASSEMBLY(Fig.47).a.Disconnect

).

IX),uncouplespring(23) andliftthe

VERASSEMBLY.^*.Reversere-

dintheprecedingparagraph.


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nosisandRemedy.

ECAUSE

e.

rcylinder.(2)

mberorcyl-(3)

rakeapplica-(3)

ylinder.

kadjuster.(6)

stvalveor(7)

n.

ealso results

on.

ctornot (3)

slackad- (4)

velisexces-

hose.(6)

vesandrelay (7)

gtohold.

valve,dia-(1)

alvestem.

rewheels.

ver oncross(1)

sorrods.(2)

aking..(5)

inghot.

hub. (1)

ever.(2)

n levers.(3)

vispins.(4)

pleteoffposi-(6)

ods. (7)

n.(8)

se,not (9)

actorcoupl-

not be

rapplica-

nmainte-

re.)

ment.

ose.

eplace

gm.

cemanual.

ractor

ly.


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WINGINSTRUCTIONSAPPLYTO

OLLYGEARFRAMEONLY.

emovetheboltsholdingbaseand side

e.Liftthecouplerassemblyoffconvertergear.

lacementofcouplerisinreverseof

placementcouplerinuse,spreada

heembossedportionof couplerandworka

ok.

MOVALDOLLY.

TINGPLAYINHOOK(Fig.49).

ymaybeencounteredwhenuncoupling.

ionalpartsofthe coupler.Thetroublelies

kingpinis binding011thehook.Thisis caused

beingasfarapartas possiblewithoutactually

snecessarytoovercomethedifficultyis to

onthehookhandle priortouncoupling.

omesworn,thecouplerwilldevelopan

motion.Thefollowingrepairsshouldthenbe

aybemadewith couplerattachedto

oupleris easilyremoved,werecommendthat

tergearandturnedupsidedown,whenper-

emoval.1.Removecotterpins(12


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PLODEDDOLLY.

outtotheunlockedposition.

ews(14)andlift hookhandleguideoff

d,removeeyebolt(1).

6)offbolts(10) andliftthehook

7.Placealightfilmofgrease

ers(29),and onthesurfaceofhookplate.

hookpin(17).

kpin (17).

overbolts(10).

erhookpin (17)withtheembossed

etwonuts (11)onthebolts (10).

ohookhandle(7).


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ANUAL

betweentheeyeboltinhookhandleand

rew(23).

onofhook.Itshouldmovefreely

ay.If thehookmovestoofreelyandthere

veashim(25and26). Ifhookbindsadda

10).Afterproperadjustmentcontinuethe

throughpin(17).

, placeguideplate(13)in position,

capscrews(14).

khandle(Fig.49).1.Whenper-

onnectconvertergearfromtrailer.

andle(16)byremovingthe drivepin

hreadedlockstem(6).

7).

overplate(22).

ked"position.

ock(6)andtapthe endofthehooklock

ckspring(28) willcomeout.

eslantedorbeveledpartof thelockmust

le.

NTOWINGVEHICLE(Fig.50).a.

thwheel)is ofasemi-automaticuniversal

eavycoilsprings(25)whichhold 5thwheel

hendisengagedfromtrailer.

e5thwheelcanbeeliminatedbyadjustment

derwalkingbeam(26).

onstruction.Supportbracketshaft(30)

machinedandgroundtoaccuratelimits.

nd 16)semi-automatictypewhichem-

ekingpin whenlocked.

redby 5thwheelexceptfortheusual

UNGERSPRING.a.Removal.

slottednutfromplunger stud(35).

udwasheroffstud.

ring assemblyoutofcouplerbase.

gershaft.

tplungershaft,plunger,andwasher

rereassembling.

eversalofremovalinstructions(para-

1)Removethetwo%"cotterkeys


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PLODEDTOWINGVEfflCLE.

6)andjaw pinwashers(13).

tbottomandtopsides ofjawswith

ft-handjawsareplacedonpropersides.

determinedbypostswhichprotrudefrom

).

reverseofremovalinstructions(para-

.Removal. (1) Removetheeight

ruckframeassembly.

ermountingplate.

seats.

ureisareversalofinstructionsfor removal

.


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ANUAL

AFT..Removal. (1)Remove

tsideofwalkingbeam.

t,usingaflatend barandsledgeham-

e about1V&"indiameter.)

tshaftcareshould betakennotto

.Abent shimwasherwillbedifficultto

allationsmaybefoundbetweenwalking

etheprocedureoutlinedinparagraph9,

ingthereshouldbenoside motion

kingbeam(26)as itwillcauseexcessivewear

playisdetected,placemoreshimwashers

gbeam.

emoval. Removethesupport

dinparagraph9,this section,anddrive

ementoflateralshaftisareversalof

agraph9,thissection).

teralshaftbesure sectionmilledout

ise,supportbracketshaftwillnotpassover

EDONTOWINGVEHICLE.

medy.

ECAUSEPROBABLEREMEDY

(1)Replace.

.(1)Replace.

(2)Straighten.

Lubricate.

play.

haft.(1)Replace.

Replace.

Replaceandadd moreshims.

NDOLLY.ServiceDiagnosisand

ECAUSEPROBABLEREMEDY

couplerandtrailer.

n wornout.(1)Replace.

ace.

lerbase.

dgouged.(1)Checkuppercouplerfor burrsin

ouging.

e.

rnuts.(1) Checknuts(11and31),tighten.

tenmountings.


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s

eralelectricalcircuitdiagramshownin

alloftheelectricalcircuitsusedon this

,thevariouscircuitscanbetracedand

de.Allelectricalunitsareshownintheirrela-

the electricalsystemisofadistinctive

will befoundonthecircuitdiagram.

a.Batteryandwiringsystemof

scussedin thismanual.Sourceofcurrent

HITETRACER

OWN

AMSEMI-TRAILER.

edasbeinga jumpercablesocketatrearof

,inlocatingtroublestartatthissocket.The

roubleshootingistheeliminationofone

afteranotheruntilthe troublehasbeen

lightswitchtothe"on"position.Place

ied"position.Withtheuseofa lowreading

esteachlightbladein socketatrearoftowing

ereisaflowof currentineachlightblade,

he socket.Testtheflowofcurrentat the

ble.Ifcurrent flowsthroughjumpercable

per cableisingoodcondition.


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AMDOLLY.


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eftasfaras possible.Thiswillgive

socket.Removethecapfromthesocketand

ghtterminalsaremarked"SL"for stop-

ortaillight,and "BK"forbrake.)Should

anyof theseterminalsitindicatessomething

hatparticularbladeofsocketwhichleadsto

wsthroughthe socketitindicatessocketisin

tomakesimilarteststhroughouttheunituntil

.Terminalmarked"BK"ishot butnotused,

cleisequippedwithanelectricbrakehandor

gequipmentonthissemi-trailerin-

earancelights,fourclearanceblackoutlights,

tstopandtaillight,onecombinationservice

kouttaillight.

estopandtaillight andblackouttail

thandrearofthe trailer.Thecombination

s mountedattherighthandrear ofthe

ULBUNIT.


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sameasthoseonsemi-trailer,exceptdolly

outandstandardclearancelights.

uttail lampisdesignedtoproducetwo

that whenonetruckisfollowinganother

tance,thesetwobeamswill mergeintoa

fconstructionnecessarytoproducethis

to thelensretainerandthe lensandfilterare

orm acompleteunit.Whenthebulbis

ytoreplacethecompletebulbunit.

(Fig.53).a.Removethetwo

ousing.

SASSEMBLY.a.Turnthetwo

gtolight assemblyinacounter-clockwise

eeof assembly(Fig.54).

s tohousing,towardtheouteredgeof

Fig.55).

LIGHTSDISASSEMBLY,STEP1.


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sfromplate(Fig.55)and pulltheassem-

refrommainline, andseparatethe

Fig.56).

cedureforeitherblackoutorstandard

.

RANCELIGHTS.a.Reassemblyof

eof removalprocedure.

ensinblackoutlightbe surethe

downand thattheword"BOTTOM"isat

shownin(Fig.56).

Thedollyblackoutswitchislocated

3).Semi-trailerblackoutswitchislocatedin

de(Fig.4).

itha coinorscrewdriver.Itiseither at

position.Thereis no"off"position.Flowof

elight switchonthetruck..

val. (a)Removenutonoutsideof

toframe.

gwirefromterminalsmarkwiresfor

ckofassemblyandremovenutshold-

wires offandswitchisfree.


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ELLOWWITHBLACKTRACERS

ITHWHITETRACERS

ACKWITHWHITETRACERS

WITHBLACKTRACERS

DOLLY.


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ollyfusepanelislocatedonthe rear

efusepanelis locatedatleftsideonmain

nt.Thepanelisprotectedbya steelbox

twowingnuts.Fusesareofl1/^ amperes

ratefusepaneldiagrams,witheachwire

pose.

nosisandRemedy.

ECAUSE

ectedat

rtrailer.

ken.

burning.

ketorjumper

ketorjumper

et.

broken.

et.

meterasin-

ssection.

meterasin-

ssection.

ycloth.

ycloth.

8volt.

esocket

BLACKOUTSTOP(BS)

VICESTOP(SS)

RVICETAIL(ST)

LACKOUTTAILANDCLEARANCE(BTC)

RANCE(BQ

RANCE(SC)

SEMI-TRAILER.


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CEMANUAL

oltedtoFrame"Parts

exceptionallyruggeddesignofthe

rylittleattentionisrequiredto maintainits

trailerswhichhavebeeninacollision,upset

remay havebentortwistedcrossmembers

n.

a.Therearethreemethodsofrivet

owedwhenservicingthisunit:Drilling,cold

ethod,oracetylenetorchmethod.

",%",%")madeupinseverallengths

sarenot availableboltsmaybeused

ersize.When determiningthesizeofthe

ll torememberthatitshouldnot bethe

places.Forexample,ay2"rivetwouldbe

ea boltcanbeusedin thesameholethe

%e"and a%e"boltshouldbe used.The

trequiresa tightfit.Donot boltkingpin.

8,Sub.paragraphC.)

laceaheavycenterpunchmarkin

htherivet.(Thishole maythenbe

erusea 1%z"drillandfinishdrilling

tusea 2%2"drill.Fora%"rivet usea

Cutheadofrivet offwithacoldcut

.

apunchandsledge hammer.

method. (1)Cutouterheadsofrivets

ngtorchequippedwithaNo. 2cuttingtip.

thaheavypunchandhammer.

ntheholeandwill notcomeout,do

emetalaround itmaybecomebentanddam-

rheadoff andblowtheremainderofthe

utwitha %"longtaperedpunch.

ngthrougharivetdonot holdtorch

eatwillbackupandcausethe tiptobecome

d.

eredwhenblowingtherivetthrough

ldbeblownfrombothsides.

FRAMEMEMBERS.a.Frame

enedthroughtheuseofheavyI-beam,jacks

t isrecommendedprovidedthemetalisnot


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GERINNERSHACKLEOUTERSHACKLE

SPACER

LLY.

otconcentrateheatin ashortspace,spread

ed.Extremeheatweakensthestructural

emembers.

MBERS.Severelybentandtwisted

tandreplaced.-..

FAMEMBER.a.Cutacrossthe

ctionata 30degreeangle,insertthesplice


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uttingata 30degreeanglethecutand weld

terarea,the resultisastronger weld.

withaplateorchannelreinforcement

hsideof thejointonthe innersideofthe

terholein everyfoursquareinchesofspace

nnel.Theseholesaretobeused forplug

ectionsplicesandreinforcementsshould

disrecommendedforallframe repairs.One

uldbe weldedsolidwithbareweldingrod.

eldinguse acoatedrod.

S-DOLLY(Fig.59): a.NOTE.When

rauxiliaryspringbracketsdisconnectdolly

TERSHACKLE

MI-TRAILER


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ameParts

nger.Removalprocedureforrear

o thatoffrontspringhangerexceptthat

removed.

Fig.59). (1)Removeouterandinner

wheelsremovedthehangeris muchmore

lywhenrivetsarebeingdriven.

titon threehorses;twoatrearlength-

swiseof frame.

tfront endonly.

ameandaxleto holdweightofthe

eeparagraph2,thissection.)Itis recom-

don dollyspringhangers.

,sub-paragraph8,thissectionfor

ns.

ghangerhas beenreplaced,itisnec-

ment(Paragraph6,sectionII).

MI-TRAILER(Fig.60).a.NOTE:

gersorauxiliaryspringbracketsit isnot

ollyfromsemi-trailer.

nger.Removalprocedureforrear

o thatoffrontspringhangerexceptthat

removed.

Fig.60). (1)Removeouterandinner

wheelsremovedthehangeris muchmore

lywhenrivetsarebeingdriven.

tfront endonly(Fig.61).

anddriveupperandlower shacklebolt

).

ameandaxleto holdweightofthe

Usinganacetylenetorch,withaNo. 2

ter headsoffrivets.

o driverivetsoutwitha puneh;but

gportion,thuscleaningthehole.

eholesusinga %"longtaperedpunch

ramewithahammer.

einterchangeablefromrighttoleft.

tand lefthandandarenot interchangeable.

makecertainhangerismountedproperlyby

hillustratesleftbandfronthanger.


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ACKLEANDPINASSEMBLY.

(a)Boltthereplacementhangerinto

olts.Placeoneholt inthecenterofvertical

hesecondholefromthe topateachsideof

ptight,and checktomakecertainspring

frame.

es witha1%s"taperedreamer.

N:Whendrivingrivetsdrivethe

eris notavailablereamholesto%e"

washers.

sshouldbe usedastheycanbe prop-

rand buckingbars.Lengthofrivettobe

noroversizeofthe holetobeusedand thick-

ed.Conditionoftherivetingjackisalso a

ck,projectingpastthesurfaceofthepart


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CEMANUAL

goffordrivingtheserivets,guard

chipsout ofuppercouplerpriortousing

onestandbyholeinfloor toactinthe event

adsfromcounter-sunkusingacetylene

merdriveup onkingpin,andremove

nallslag,greaseand otherforeignmat-

per5thwheelplatenext tothekingpin hole.

hholewithsmallflangeextendingout

r.

in kingpinholeuntilrivet holesin

upper5thwheelplate areinalignment.

ppositeeachother,andtighten.

es to1%a"diameter.

ngthemthroughhole infloor(para-

),thissection).

mholesto1%2//diameter,andcontinue

ofrivetsflush with5thwheelplate.

xBl/2"x8%",andinstall plateover

atheadscrews.

placement(Fig.63).Removedraw-

etwobolts holdingdrawbartodrawbarframe

undersideofdrawbarusingacetylene

vilwithbottomsideup.

rivetsoutwithpunch,ratherdrive down

dgehammer.

positionusingtwo%" boltsandream

offsetbuckingbar.

ontinuedrivingrivets.

AIRINGSAFETYCHAINS(Fig.63).

tothe frontcrossmemberwitheyebolts.

ersideof eyeboltwithanacetylenecutting;

haincanbereplaced.

edand bentbacktotheirnaturalshape.

cuttingthelink nexttothehookandby

Anypartofthe chaincanbespliced,or

useofcold shutlinks.Whenevercoldshut

ds shouldbeclampedtogetherandwelded.


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81/153

ody

nnelsteelunderjointfromend toend,

eandseal upseam.Usearubbermallet work-

orsimilarhardwood.

ACEMENT.Thisisamajoropera-

temptedincompletelyequippedrepairsta-

mblyisthekey toefficientrepair.Itis with

mationwhichfollowsis included.Itshould

ementofmajorbodyunite.

ure. (1)Weldtubularsideframeas-

eframe.

assemblytobaseframeandsideframe

odyside frameusinga1"woodfiller

sideof roof.

s.

roovedflooring.

g frameassemblywithhardware.

on outsideoftubing.

,after paintingtheirinnersurfaces,in

eenroofbows.

l down.

makeweathertightall joints.

apjoint betweenroofandrearroofcap.

.

apjoint betweenroofandfront

.

utoutwindowholes.

ngretainers.

andwindows.

g.

ationbetweenbodyframetubingand

rinsulationpaper.


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ACKOUTPANELANDFRAME.

y....No.

s.....No.

No.

g,-No.

No.

mes...

ng..JVo.

o.

er...-No.

ersunkflathead...!Kn"

ntersunkflathead....%2"

apping_ %a"

apping.No.21

tapping_...No.19

apping1%4"

%z"

%2"

ng%2"

ng%2"

pingNo.21

ngNo.21

pingNo.21

ngNo.21

tapping.No.21


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L

UIDECHANNELSCREWS.

Becauseproperscrewholesizeis

ndassembly,wehavepreparedthechart

edin connectionwithmajorandminor

holesarecalledfor.

VAL(Fig.64.)a.Removescrews

assembly;liftblackoutguideandpanel


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NDOWGLASS.

twoodpanel,pullout onpanelandplace

and windowframe(Fig.65).

mbothsidesofwindowguidechannel.

ig.65).Raisewindowandcontinueremov-

ionofwindowguidechannel.

echannelandlowerwindowframe

ment.a.NOTE:Windowglassisnot

rameglassandframeassemblyarebuilt

wunitisinreverseof removalinstructions

b-paragrapha,thissection.Whenreplac-

nwindowguidechannelsaredrivenhome.


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.Thepintlehookisboltedtoa mount-

Byremovingthenutand washerfromhook

anbepulledout ofsleevesandspringwhich

ction.

a.Placeshaftendofhook(1)

fromlatchanddriveout latchpin(7).

andnut(12) fromthelockbolt(9) and

ASSEMBLYOFPINTLEHOOK.

yprocedure.


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REW

EXPLODED.

cealightfilmof greaseonlatchpin,and

hiswillpreventrustfrom formingandinsure

ock.

NDSLEEVE,REMOVAL(Fig.67).

ngchanneltoboxsection.

sherfromshaft ofhook.

fspring andsleeves.

NDSLEEVE,REPLACEMENT.

edure.


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aileranddollyunder constructionare

odseach,thoseon dollyareadjustable.One

eon thesemi-trailer.Service,removaland

eachisidenticalexceptthatthefrontend of

yarenotmountedin rubberbushing.

espindlelockscrewsfromeachendof

t,spindleboot,andthetwo concave

wisttherubberbushings offthespindle.

diusrodswithapunchand aheavy

(a)NOTE:Oneendofradiusrod

einthe end.Theotherendhaslockscrew

adiusrod inpositionwiththeend holeto

.Theotherend,whichfitsintobracketat

eendofradius rodismoredifficultto connect,

ledfirst.

REMOVAL.


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EXPLODED.

positioninradius rod(10).

esure thetwoinnerflatretainer

weeneachsideof radiusrod(2).

rnspindle untillockscrewholein

holeinradiusrod.

d tighten.

bber bushings(5)overspindle.

veretainerwashers(5)andspindle

pindleboltuntilafterboth endsofradius

sareinterchangeableasallfourare

encounteredwheninstallingrubber

ubricanttoworkbushingsintoposition.With

ebushingsintoplace.


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LSEMI-TRAILER(Fig.71)._

memberatside fromwhichyouintendto

notherjackunderaxle toholdtheaxlein

mU-bolts.

rshackleboltnuts,and driveupperand

oneunit.

outshackleboltassemblykeepclear

llto ground.

blyfromoppositeendandpullspringout.

(a)

ngis

springmakecertainspring chairis

ndthat dowelpinisplacedin springchair.

clipboltstowardcenterof trailer.When

awrench withatleast3ft. ofleverage.Itis

beverytight. Itisimpossibleto stripthese

VALSEMI-TRAILER.


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VALDOLLY,STEP1.

PRINGSEMI-TRAILER(Fig.

ossmember.Donotjackunderaxle.

sandremoveU-boltspacerplatelo-

ring.


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VALDOLLY,STEP2.

boltsforwardatanangleof about60 aa

osecureclearanceunderframemember.

pring chair.


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ANUAL

verseremovalinstructions,outlinedin

OLLY.-^a.Springreplacementcanbe

edtothe semi-trailerandwiththehuband

rameandjackunit upuntiltensionhas

ng.Placesecondjackunderaxle.

drivedownonU-bolt plate(Fig.72).

wnonU-boltplatehit frontandrear

ydrivingplateoff inthismannerpossibility

sisminimized.

hackleboltsfromupper endofshackle.

rdsrearoftrailer(Fig.73).

r ofunit,andpullspring assemblyout

rakechamber,restingspringonaxle.

ightofthe springitwillrequire three

twoatfrontendandone atrear.Move

olly, usingcarenottodamagebrake

T DOLLY. a.Replacementof

ovalinstructions(paragraph1,thissection).

the headsofclipboltsin toward

ngshackleboltsdonothitthemwith

are hardenedandwillchipveryeasily.

helossof aneyeorotherinjury. Insteadof

peroneorplaceapieceof woodoverthehead

buffer.

ningU-boltnutsmakesuretheyare

enchwithabout36"ofleverage.)Itis im-

byhand.

ththespringontwowoodhorses

nearspring centerbolt.

centerboltand driveouttheboltusing

eavyhammer.

tsand clipspacers.

cksandbreaks.Replace.

oose,heatrivetswithaheatingtorch

enhammer.

NGS.a.Whenreplacingboth

hespringsprior toinstallationitcanvary

thespring withthegreatestamountofarch


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prings

eepthe springclipboltstothe insideandnuts

sare mounted.Thiseliminatespossibletire

tboardasalevel,placeit acrossthemain

urethe distanceatthecenterboltfromboard

erminethearch.

ngsshouldbegivenfrequentvisual

vice.Springsshouldbecheckedimmediately

l.

bedrawnup tightenoughtotakeupall

otso tightastopreventfree actionofshackles

ghtcheckedfrequently.LooseU-bolts

ng breakage.

ould alsobekepttightat alltimes.

eavesin alignmentshouldbetight,but

eemovementofleaves.Frequentinspection

d theyshouldbetightenedupwhennecessary.

oshift,whichmaycauseshearingof spring

elostsomeof theirresilienceorelastic

acethemwithnewones.Anyattemptat

archbyheating,bending,and temperingis

reinthehands ofacompetentblacksmith.

NDHANGERSSEMI-TRAILER.

pringtensionisrelievedonsprings.

sandlift innershackleoffshacklebolts

acklepinsout inoneunitusinga copper

wear.Ifworn,reverse themwhenreas-

placethesmoothsideof eachshackletoward

otchangethepositionof theshacklefromthe

hespring.

yremoved.Removethetwopinchbolts

ns.

ingdriverinbushinghole anddrive

heavyhammer.

verthe smallendofthebushing driver

betweentheshoulderofthebushingdriver

t asastopwhendriving,preventthe bushing

preventtheendofthe bushingfrombecoming

s beeninstalled,reamto1"diameter.


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DSPRINGHANGERSDOLLY._

trailer.

me usingadoublespreadchainand

relievedfromsprings.

tsandshackles.

singa1%"x1V" bushingdriver.

ream tol1/^"diameter.

bolts andshackles,inspectforwear.

rshacklescanbe reversedbyplacingsmooth

nger.

tendof springassembly.

agnosisandRemedy.

ECAUSE

n.

n.

eaves.

eaves.

n.

es.

tedcapacity.

quirelubrica-


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operlylubricatedsupportswillrarely

sourceofdamagecomeswhentraileris

supportsdown,andalsowhenthevehicleis

the "down"position.

pttoworkonsupport unlesstraileris

ctor,orelseproperly blockedupatits

GASSEMBLYATTACHEDTO

sdownuntilstopisreached.Placescrew-

;openlockringandpry itoffconnecting

epinout.

emovingtwocapscrews(Fig.75).

tsandonecap screwholdingconnecting

uthousing(Fig.76).

uter endofoperatingshaftwhichholds

kets.Removefourboltsfromgearhousing

pleteassemblyoffI-beam.

RATINGASSEMBLYATTACHED

llgearhousingwitha lightgradeof

bearingsleeve(10)intorearbearing

mall daubofchassislubricantintobearing.

ctionsasoutlinedinparagraph2,this

BRACKET

ONNECTINGRODPIN.


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BRACKET

SINGRISERSCREWNUTDOWEL

PPORTSLIDEBRACKET.

RATINGMECHANISMEXPLODED.

ATINGASSEMBLY(Fig.78).a.

nedinparagraph2,thissection.

ws(30),lift cap(32)offofgear hous-

ffscrew(14).


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MANUAL

(24A)attached,outofgearhous-

woodblockanddrivepin (25A)outof

pered%e"punch.

th gear(24)attached,outofhousing

rosswoodblockandwiththe aidofa

rivepin(25) outofgear(24)and tapgear

ATINGASSEMBLY(Fig.78).-

2) withgearteethtooutside(Fig. 78).

h holeingearandshaft.

0)overendof operatingshaft(2)with

bearing(11)overoperatingshaft(2) with

vexsurfaceofbearingsleeve.Placeshaft

using(26).

4A)are interchangeable;bearings

hangeable;drivepins(25)and(25A)are

sleeve(10)and(10A)areinterchangeable.

er screw(14)withteethfacingthread

to riserscrew,usingdrivepin(25A).

hholein gearhousing(26)sothat teeth

bearingcap(32)withconcavesurface

into bearingwithflatsurfaceout.

ndof riserscrewandfastencap,using

ightgradeofchassislubricantassem-

edonI-beam.

ELANDAXLEASSEMBLY(Fig.

ectingrods(19)and slidebracket(20).(See

omouterside ofpin(5)and driveout

rut(9) andwithaheavyhammerdrive

mpin (6);removebolt(7)andtap

faxle.

atedin Fig.79areinterchangeable

versa.

pection,priortoplacingthisunitin

avebeenworkedupon,tomakecertainall

ace,andtightendown.Checktomakecertain

donall hingepins,seeFig.79 forpositionof

gs.


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EELASSEMBLY.

LANDAXLEASSEMBLY.a.Reas-

ssemblyisin reverseofdisassemblyinstruc-

6,this section.Besurethatalllock rings


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allbolts aretight.Placealight filmofgrease

wheels.

PAIRS.Bentsupportconnectionrods

tened.Measurementofthestraightenedrod

ensionsoutlinedinFig.80.

BEAM.Minordeflectionsinthe

aightenedwithasledgehammerand acety-

ereplaced.

eldsholdingitto crossmembers.

n;I-beamshouldbecentralizedat both

his,measurethedistancefromtheframe

DWHEELS.a.Removethebolts

addlemountedstruts.

thetopofthe straddlemountedstrut

y.

axleandthewheelscanbeslid off.

AYOUTFORSUPPORTCONNECTINGRODS.


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TIRECARRIER(Fig.81).a.

7) fromstudbolts(14),usingl argeendof

EXPLODED.


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TENANCEMANUAL

wrenchoverend ofratchet(24).Shove

)downtothe releasedposition.Lowertireto

heelwrenchhandle.

o falltoground;instead,unwind

IER(Fig.81).a.Removethetire

vethefourbolts (19)holdingtirecarrier

EPLACEMENT.a.Removebolt

um (11).Removethecableclamp(8)

addle(9).

able,placecenterofcableonbolts

sare thesamelength.Shouldonesideof

her,the tirewillnotwindup level;extra

willbe placedonshortendofcable.

IERRATCHETRELEASEHAN-

andwasher(23).Pullbolt(21) outof

).Pullspring(26) offhandle.

nremovingwheelsfortirerepairs,

sand nutsaremarkedwithletters"L"or

right.Whilenuts arenotinterchangeable,

heymaybeusedasinner orouter,rightor left.

etermineswhetherthe hubisright

rchangeable.Studsarenot,duetothefact

eft"hand threads,dependingupontheside

yare tobemounted.

carriedouttowheelsthroughthestuds,

wup wheelnutstightandwithequal pres-

atight wheelfit,followthissimple

nkholesin wheelsareclean,freefrom

ednuts whichholdinnerwheelinplace.

llnutsby progressivelytighteningopposite

ytight.

drawupouterstudnuts inthesame

.

ewhenmountingwheelstoplacevalve

rtofacilitatetireinflation.

WHEEL.a.Removewheelfrom

oescapefromtire byremovingcorefrom

re toolinslotprovidedfor thepurposeon

ping oppositesideofrimwitha hammer.


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resandTireCarrier

flatebeforeinstallingtire andwheel

akesurethatlockring isproperlyseatedin

asafetychainlooselyaroundtire

uardsagainstpossibleserious injuryshould

ginflation.Lackingthis,inflatetireswith

you.

OFTIRESANDTUBES.^a.All

ttosustainweightof theloadedtrailer.

mendedpressureismaintained,tireswill

andconsequentlysafe,economicaloperation

stbefollowedif excessivetirewearisto

ectair pressure(75Ibs.).

ortruerunning.

ps.

design.

slidetires.

ts,etc.

tires.

tedcorrectly.

noradjustments.


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donthis unitrequirenoservicebar-

nt.Shouldanywheelbecomedamageddue

atherthananyattemptatrepairis

RNORBROKENSTUDS.a.Remove

ndplaceon thefloorwiththeinside of

orstuds) whichyouwishtoreplace.

out brokenorwornstud.

randplacenewstudin position.Make

isplacedsothatit willfitintogroovein hub.

sing acopperhammer.

mup, andtightennut.

HEELASSEMBLY.


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BLY.Toremoveaxlehubassembly

ocedureisrecommended.

teor woodplankunderbothdualtires

ovalofhuband wheelassembly.

crewsonhubcap,pullcotterkeyfrom

utby turningitina counter-clockwise

erunderouterbearing,prygentlyand

er(Fig.82).D-washerandbearingmay also

ed off.

sedskid platetofacilitateitsremoval.

eelyonceouterbearingisremoved,it is

oesaredragging.Thisdragis easilyremoved

djustmentthroughcounter-clockwisemove-

gwrench.

MBLY.Beforeinstallingwheelson

ewashedin cleaningfluid,astiffbrushem-

nmatter,andbearingsthoroughlyinspected

wear.Alldirtapt togetintohubs should

ollows(Fig.83):

betweenthetwo cupswithnewgrease

bouta %"layerofgreaseoninner andouter

othinnerandouter bearings.

g(5)in hub.

WHEELASSEMBLY.


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UP.

(6)withits flangedsidetowardthe

aseretainer (7)nexttocompressionring.

axlespindleandlockintoplaceby

9)whichfits intoasloton spindleanda

nowreadytoslipon.

e, slidewheelonspindle.Placeouter

allD-washer(3).

t,thenslackoffabout1/3 turn.Test

eabar.Rest oneendonfloorand liftup

barup anddownwhileholdingonefinger

xcessiveplayisquicklydetected.

djusted,fitcotterkey(1) intowheel

reaseandreinstall withcapscrews.Turn

freelycheckforbrakedragbymeansof

o correctthetrouble,feltgreaseretainer

ceduringassembly.Tocorrectthis diffir

blyandreinstall.

UPS(Fig.84).Placeasoftsteel bar

ofcuptoberemoved.Usinga heavyhammer,

dthenthe other.Byalternatinginthis

straightwithcupbore. Dangerofwedging

d.


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heels,HubsandDrum.

UPS.a.Withwheelonits side,

bore sothatitssmallestinside diameterwill

ace.

odorsoftsteel overcup,driveitin

dgeof hub.

verthe newoneinthesamemanneras

cupinuntil itisabsolutelytightwith cup

upis properlyseatedbecauseifitis notit

nbearingcentersandmakeimpossibleproper

earingcupbecomeslooseinhub, re-

pairofloosecupscanbeaccomplishedby

ucediameterof bore.Simplyuseaheavy

t12punchmarksper squareinchaboutthe

cupborewherecupnormallyfits.

ECTION.Bearingsandcupsshould

whereverwheelsareremoved.Pittedor

houldbereplaced.


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ntbytelephone

waysbeconfirmed

onmarked:"Con-

ata)"

SPAREPARTS"

r righthandcor-

equisitionform.

Mtur,JUek.QrjJi*t.on,Dti'lnt1oD.Ifdif-

tddrt**):

undlag

HECjUKC

E

OLLT


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110/153

TIONS

correctformfor submissionbythe

sshownontheoppositepage.

DINMAKING

ationofwork,PropertyOfficersmay

preparerequisitionsinfinalform,leaving

blankforcompletionbyPropertyOfficer.

WILLBEOBSERVED

REQUISITIONS

sitionforeachdifferentmachine.

upperrighthandcornerof requisition

onbyuseofoneof thefollowingterms:

tionofauthorizedallowances.

bsequentrequisitionstomaintain

nsfornecessaryrepairsnotcoveredby

nstructions.

ureofmachine,andmake,model,serial

umber.

nddate deliveryisrequired,immediately

ine.

dergroup headingsasshowninmanufac-

artsnumbersandnomenclaturedescriptions

y.Donotuseabbreviations.

ems.

sentbytelephone,telegraph,orradiomust

ediatelywithrequisitionmarked:"Con-

ata)."

mustbeaccountedfor.


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LY


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athitru

Documents

Tm 5-9056 SEMITRAILER ACETYLENE CHARGING PLANT