Dongfeng Chaoyang Diesel engine Co CYQD 32 Series CYQD32 User manual
2
Foreword
CYQD32 seriesdieselengineisaproductwithinternational
advancedlevel.Thetechnology wasintroducedfromNissanDiesel
EngineAutomobileIndividualPlant byourCompany.Itcanequip
with1-2tonslight-dutytruck,light-dutybus, pick-up,jeep,army
vehicle, cross-countryvehicleand business vehicleandect.
Accordingtotheperformance,atpresent CYQD32 seriesdiesel
enginemainlyincludesCYQD32,CYQD32EGR,CYQD32T,
CYQD32Tifourmodels. Andonthebaseofit,italsohasmore than
tenmatchdeformation,suchasQD32-1B QD32EGR-1A
QD32T-2A QD32Ti-1A.
Theseries dieselengineserialnumber,whichatthefront of __”,
expressesessentialconfigurationand performance,whichattheback
of __”expresses equippingdeformation.
Inorder tomakedieselengineoftenkeepgoodtechnology state,
andconvenient forcustomer’smaintenance and repairing.Sowe
wrotethemanualespecially.
Becausetheseries dieselengineiswithadvanced general-purpose,
series, andstandard”level,themanualcanbeappliedfortheserial
all themodels.
Thedataand explanationwhichthemanualsupplieddependingon
theexistingtheproducts. Withthetechnology developingand
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Catalogue
I. Summary
1. Themaindataand briefspecificationofdieselengine
2. Themainperformance and outlinedimensionofdiesel
Engine
3. Indicationsymboland meaning
II. Outer partdisassemblyandassemble
III.Inner partdisassemblyandassemble
IV. Dieselenginemaintenance, checkingandadjusting
V. Basicparts disassembleandreassemble
1. Rocker-armshaftconjunction
2. Cylinder headand valves
3. Pistonconnectionconjunctionassembly
VI. Basicparts checkingand maintenance
VII. Accessoryparts disassemblyand checking, repairingand
adjusting
1. Lubricationsystem
1)Pressure lubricationsystemabridgeddrawing
2)Pistoncoolinginjectionnozzle
3)Oil filter
4)Oil cooler
2. Injectionpump
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1.Inprinciple,assemblyorder
counteredwithdisassembly
order,inother words, first
disassemblylastassembly,last
disassemblyfirstassembly.
2. Note:
1)Sealgasketand plug
Wheninstalling,gearchamber
cover,oilsump,highpressure
fuelinjectionpumpgearcover
mustbepaintedsealingglue,the
other partsdon’tneedtobe
paintedsealingglue.
2)Inletpipe
Whenassemblyinletpipe,to
tightenscrewboltandnut
accordingtothestipulated
digitalorder andrequired
torque.
3)Exhaustpipe
Whenassemblyexhaustpipe,to
tightennut accordingtothe
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stipulateddigitalorder and
requiredtorque.
4)Oil cooler
Totightenscrewboltaccording
tothestipulateddigitalorder
andrequiredtorque.
Note:Differentlengthscrew
bolts don’tmakewrong.
5)Oil sump
Totightenscrewboltaccording
tothestipulateddirectionand
requiredtorque.
6)Cylinder headcover
Totightenscrewboltaccording
tostipulateddigitalorder and
requiredtorque.
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1.Inprinciple,assemblyorder counteredwithdisassembly
order,inotherwords,firstdisassemblylastassembly, lastdisassembly
firstassembly.
2.Whenassembly,everymovingplaneofunionmustadd justtheright
amountgrease (oil).
1)Themainbearingbush
Tomakethemainbearing bush
locatinglipinsertinthemain
bearing coverlocatinggroove.
2)Themainbearingcover
Thearrowofthemainbearing
cover facedtothefrontofthe
engine.Thenumber onthetopof
arrowispositionNo.,thenumber
onthebottomofarrowheadis
batchNo.andmodel.
3)Crankshaft thrustplate
Oilgroovesofupperandlower
thrustplatefacedtothesliding
face ofcrankshaft.Thelocating
convexend oflowerthrustplane
insertedinthelocationgrooveof
mainbearingcover.
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4)Themainbearingbolt
Totightentorequiredtorque
bytwiceaccordingtostipulated
digitalorder.
Torque(N.m) 167-177
5)Pistonconnecting –rodgroup
Pistonringopeningliestothe
positionrecommended.
Themarkonthepistontop
facedtothefront(ortheinlet
valvenotchdeviationthefront
end.)
Wheninstallpiston,tomake
theringcompresswiththespecial
tools.
Thebigendboltpositionsideof
connecting-rodismatchingNo.,
theothersideisqualitygroup
No..
Afterconnecting-rodbolt
waspaintedoil,thenassembly.
Torque(N.m)78—83
6)Idlershaft
Oilholefacedtothetop.After
insertedingearandpress plate,
thenmakebolt tighten.
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7)Camshaft thrustplateand gear
Totightenthrustplateboltby
theholeofcamshaft gear.
Afterpaintedoil,toassembly
camshaft gearcompressbolt.
Torque(N.m) 57—66
8）Timing mark
To installtiminggear
accordingtothetimingmark
symbol.
Idlerpressplatechamferfaced
to outside.
9)Oilpump
Afterfillingsomeoil,then
assembly. Whenassembly,to
tightenanybolt, wemustrotate
gear,and don’thaveinhibition.
10)Flywheelcase
Afterbolt waspaintedoil, then
assemble.
Torque(N.m) 60—70
11)Flywheel
Tomakeoilpainonthreadof
thebolt andtheheadend,thento
tightenaccordingtothestipulated
digitalorderandrequiredtorque.
Torque(N.m) 167—186
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12)Startpaw
Touseoilpaintonthethread,
thentightenstartpawtothe
stipulatedtorquewith6102.29.01
startpawwrenchand6102.29.02
wrenchlever.
Torque(N.m) 373—402
13)Cylinderblockgasket
Tomakecylinder blockgasket
cylinder holeturnededgeside
facedtothecylinderblocklink
surface.
14)Cylinder-head
Tomakeoilpaintonthethread
oftheboltandthehead,then
tightenbythreestepsaccording
tothedrawingdigitalorder and
torque.
15)Rocker-armshaft conjunction
Totightenbolt and nut
accordingtothestipulateddigital
order.
16)Valveclearance
Toadjustthevalveclearance
withQD290.CN101valve
clearancegauge.
Coolingvalveclearance
Inlet,exhaustvalve
(mm) 0.35
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IV.Dieselenginemaintenance,checkingand adjusting
1.Valveclearance
Toadjustvalveclearancewith
QD290.CN 101 valveclearance
gaugeaccordingtothefollowing
methods:
Torotatethecrankshaft
accordingto dieselenginerotation
direction, makethe T.D.C.
calibrationmarkofthe
crankshaft bejustificationwith
timingcalibrationmarkof
sound-proofcover (CYQD32,
CYQD32EGRisjustification
withthebottomcalibrationmark,
andCYQD32T,CYQD32Tiis
justificationwiththetop
calibrationmark),and make1,4
cylinder pistonlietoT.D.C..To
shakethefirstcylinderinletand
exhaustvalverocker-armwith
hands,if thebothexistclearance,
itshowedthefirstcylinder piston
liestoT.D.Cofthecompress
stroke.
Iftherocker-armhaveno
clearance,soitexistedclearance
betweenthefourthinletvalveand
exhaustvalverocker-arm,and it
showedthefourthcylinderpiston
liestoT.D.Cofthecompress
stroke.
Tofinishadjusting allvalve
clearancebytwice.
Coolingvalveclearance:
Inlet,exhaustvalve(mm) 0.35
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2.Fuelfilter
Exhaustponding
Regularlyreleaseleverlower
plugoffuelfilterandexhaust
pondinginfilter.
Cleanorreplacefilterelement
Todisconnectingthefiltercase,
andtakeoutfilter element,clean
orreplace fuelfilterelement
(dismountingseefuelfilter
resolutionand reassembly),if
necessary,replaceeveryseal
parts.
3.Injector
Checking
Tocheckinjectionoil pressure
withinjectortestdevice.
Standardstarting
injectionpressure(kPa) 9800
Adjusting
Toobserveand adjustinjection
fuelwithinjectortestdevice.
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5
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