Kaiser-Jeep Jeep CJ-3B User manual

1953-71
SERVICE
MANUAL
JeeP UNIVERSAL
4-WHEELDRIVE
CJ-3BCJ-5A
CJ-5 CJ-6
CJ-6A
2-WHEELDRIVE
DJ-5 DJ-6
Copyright® 1977
FIJeepCorporation
CorporatePublications
Printed inUSA
Reprinted 6-77
SM-1046
SECTION INDEX
NAME
Section
General Data
A
Lubrication
B
Tune-Up
C
Hurricane F4Engine
D
DauntlessV-6Engine
Dl
Fuel System E
Exhaust System
F
Exhaust EmissionControl
SystemF4Engine
Fl
Exhaust EmissionControl
SystemV6-225Engine
F2
CoolingSystem
G
Electrical H
Clutch
I
3-Speed Transmission J
4-Speed Transmission
Jl
Transfer Case
K
PropellerShafts L
Front Axle
M
Rear Axle
N
Steering 0
Brakes
P
Wheels 0
Frame
R
Springs
ShockAbsorbers
S
Body
T
Miscellaneous U

IMPORTANT DEALER INFORMATION
This manual,SM-1046,coverscurrent'Jeep'UniversalSeriesvehicles,and
pastmodels, except as noted hereinafter:
SM-1037shouldberetainedinyourservice library for
informationrelatedtothe 6-volt electricalsystem,orthe
singlebrakesystem.
SM-1002-R5 (nolongeravailable)shouldberetained
forinformationrelatedtothe CJ-2A,CJ-3A or DJ-3A
models equippedwiththeL4-134 engine.
The above threemanualsprovide full servicecoveragesinceinceptionofthe
'Jeep'Universaland
1
Jeep'Dispatchermodelvehicles.

'Jeep* UNIVERSAL SERIESSERVICE MANUAL
A
GENERAL DHTfl
Contents
SUBJECT PAR.
General A-l
Vehicle Description.A-2
Vehicle IdentificationA-3
Identification NumberLocationA-4
Serial NumberLocationA-5
Engine CodeNumberA-6
Plate-And-Trim OptionPlateA-7
General SpecificationsA-8
A-1. GENERAL
This manualisprovidedfortheguidanceofall
automotiveservicemen,vehicleowners,and
servicesalesmenwho repair, maintain,oradjust
the'Jeep'UniversalSeriesvehicles.Theinforma-
tionhereinwaspreparedfromtheserviceman's
viewpointto give himtheaccurateandconcise
data hemayneedtoservicetheentirevehicle.
The informationisnotelementaryasitisintended
forautomotiveservicemenwhoarefamiliarwith
automotiveconstructionandrepairingeneral.It
isnotintended,norwoulditbepossibleinsuch
limited space,tocovereverypossiblerepairthat
hemayencounter.Allspecificationsareinaccord
with EngineeringSpecificationsandshouldbe
adhered toinallworkonthevehicle.
The manualsectionsfollowlogicaldivisioninto
major componentsofthevehicles.Thefirst page
ofeachsectionhasa detailedindexofthe contents
ofthatsection.Subjectmattercoversallmodels
included inthismanualunlessanexceptionfora
particular modelisspecificallymentioned.
Specificationsandcomponentscoveredwerefor
standard productionmodelsof'Jeep'vehicles
current atthetimethemanualwasapprovedfor
printing. 'Jeep'Corporationreservestherightto
discontinuemodelsatanytimeorchangespecifi-
cationsordesignofanyofitsmodelswithout
noticeandwithout incurring anyobligation.
A-2. VehicleDescription
This manualcoversallstandardproduction'Jeep'
Universal modelscurrentlybeingproducedatthe
timethismanualwasapprovedforpublication.
Significant changesmadeineachmodelsinceit
wasfirst producedareincludedinthemanual.
A descriptionofeachmodelfollows. General
specificationsforeachmodelarelistedinPar.A-8.
Detailedspecificationscoveringmajorvehicleunits
are listedattheendofeachsectionofthemanual.
CJ-3B — This isa 4-wheel-drive'Jeep'Universal
model,equippedwiththefour-cylinder
Hurricane F4-134engine.Wheelbaseis
80".
CJ-5
CJ-5A — Theseare4-wheel-drive'Jeep'Universal
models,equippedwitheithertheDaunt-
less V-6engine,orthefour-cylinder
Hurricane F4-134engine.Wheelbaseis
81".
CJ-6
CJ-6A — Theseare4-wheel-drive'Jeep'Universal
models,equippedwitheithertheDaunt-
less V-6engine,orthefour-cylinder
Hurricane F4-134engine.Wheelbaseis
101".
DJ-5
DJ-6 — Theseare2-wheel-drive'Jeep'Universal
models,equippedwiththefour-cylinder
Hurricane F4-134engine.DJ-5wheel-
baseis81".DJ-6wheelbaseis101".
A-3. VehicleIdentification
Each 'Jeep'vehiclemodelserieshasoneormore
serial numberprefixestoidentifyit.Complete
identificationofa specificvehiclerequiresthe
prefix plusthe serial number. Serial numbersare
consecutiveforeachprefixgrouping.Prefixinfor-
mationfollowing will identifythe'Jeep'models
shownby serial numberprefixfrommodelinception
todate.-. •• ' . -
Note: Vehicleswitha serial numberprefixoffive
(5)ormoredigitsthathaveanS,5,or7 asthelast
digitareequippedwith Exhaust Emission Control.
A number1 inthesixth(6th)digitwithina seven
(7)digitvehicle serial numberprefixindicates
Left Hand Drive; a 2 indicatesRight Hand Drive;
a 3 indicates Left Hand Drive California Exhaust
Emission Control Engine; a 4 indicatesRight Hand
Drive California Exhaust Emission Control Engine.
3

A
GENERAL DATA
'Jeep'
Serial No.
'Jeep'
Serial No.
Model Prefix Model Prefix
CJ-3B
453-GB2
CJ-3B
454-GB2
57348
8105
8105014
CJ-5
57548 CJ-6
57648
8305 8405
8305A 8405A
8305S 8405S
8305AS 8405AS
8305014 8405014
8305015 8405015
8305016 8405016
8305017 8405017
CJ-5A 8322
CJ-6A
8422
8322A 8422A
8322S 8422S
83 2 2AS 8422AS .
DJ-5
8505 DJ-6
8605
8505A 8605A
8505S 8605S
8505AS 8605AS
8505014
8505015
8505016
8505017
Any prefixnotgivenhereforoneofthelisted
modelsindicatesa specialvehiclewhosedifferences
from standardarenotcoveredinthismanual.
A-4.IDENTIFICATION NUMBER
LOCATION
All 'Jeep*vehiclesand some oftheirmajorcom-
ponentshaveidentifyingnumbers. Paragraphs fol-
lowing will describethelocationofidentifying
numbers.
A-5. Vehicle Serial Number
The vehicle serial numberisstampedona metal
platelocatedonthedashunderthehood.Itison
theleftsideofthevehicleformodels CJ-5,CJ-5A,
CJ-6, CJ-6A, DJ-5andDJ-6asshowninFig. A-l.
It isontherightsideofthevehicleformodel
CJ-3B, asshownin Fig. A-2.RefertoPar.A-3for
specificinformationoncodes.
FIG. A-l—CJ-5,CJ-5A,CJ-6,CJ-6A, DJ-5,DJ-6
VEHICLE SERIAL NUMBERLOCATION
FIG. A-2 CJ-3B VEHICLE
SERIAL NUMBERLOCATION
A-6. EngineCodeNumber
The engineidentificationnumberconsistsofa
prefix followedbya five-digit orsix-digit code
number. Theprefixidentifiesthe particular engine.
The F4-134engine code numberisstampedonthe
FIG. A-3—ENGINECODENUMBERLOCATION
HURRICANE F4-134
FIG. A-4—ENGINECODENUMBERLOCATION
DAUNTLESS V-6
4

'Jeep' UNIVERSALSERIESSERVICE MANUAL
A
waterpump boss atthefrontofthe engine, as
showninFig.A-3.TheDauntlessV-6 code number
isstampedontherightfrontfaceofthecylinder
block,just below therockerarmcoverasshownin
Fig. A-4.
A-7. Paint-and-TrimOptionPlate
A Paint-and-Trim OptionPlateisinstalledonlate
production'Jeep'vehicles.Thepaint code onthe
plateidentifiesthepaintcolors.Thetrim code on
theplateidentifiesthecolorofalltrimpartsinthe
interior ofthevehicle.
To identifypaintortrimonvehiclesmanufactured
before thePaint-and-TrimOptionPlatewasin-
stalled,seeyour'Jeep'dealer.
'Jeep'Universalshavetheplatelocatedonthe
righthandsideofthedashunderthehood,as
showninFig.A-5.
FIG. A-5—PAINT AND TRIM
OPTION PLATELOCATION
5

GENERAL DATA
A-8.GENERALSPECIFICATIONS
MODEL:
CJ-3B
CJ-5, CJ-5A
DJ-5
CJ-6, CJ-6A
DJ-6
Engine:.
Number of Cylinders
Bore. .
Stroke.
Displacement
Compression Ratio:
Late Production— Standard
— Optional.
— Optional.
Early Production— Standard
— Optional.
— Optional.
Compression Pressure
Horsepower (max. Brake)
Horsepower (SAE)
Torque (Max.at2000 rpm.). . . .
Engine:
Number of Cylinders
Bore
Stroke
Displacement
Compression Ratio
Horsepower (max. Brake).
Horsepower (SAE)
Torque (Max.at2400 rpm.). . . .
Wheelbase
Tread (frontand rear) ,
Height (Over all)
Length (Over all).
Width (Over all)
Ground Clearance
F-4
4
3.125[7,93cm.]
4.375[11,11cm.]
134.2cu.in.[2,20ltr.]
7.4:1
7.8:1
6.9:1
120to130psi.
[8,4a 9,2kg-cm2]
75<§4000rpm.
15.63
114lb-ft.[15,8kg-m.]
80" [2,03m.]
487-'f6
/'[1,23m.|
6634"[1,68m.j
129%" [3,30m.]
68%" [1,75m.]
8"[20,32cm.]
F-4
4
3.125[7,93cm.]
4.375[11,11cm.]
134.2cu.in.[2,20ltr.]
6.7:1
7.1:1
6.3:1
7.4:1
7.8:1
6.9:1
120to130psi.
[8,4a 9,2kg-cm2]
75@ 4000rpm.
15.63
114lb-ft.[15,8kg-m.]
V-6
6
3.750"[9,525cm.]
3.400"[8,636cm.]
225cu. in. [3,69ltr.]
9.0:1
160@ 4200rpm.
33.748
235lb-ft.[32,49kg-m.]
81" [2,06m.]
48K6" [1,23m.]
67" [1,70m.]
138%" [3,51m.]
71%" [1,82m.]
8"[20,32cm.]
F-4
4
3,125[7.93cm.]
4.375[11,11cm.]
134.2cu.in.[2,20ltr.]
6.7:1
7.1:1
6.3:1
7.4:1
7.8:1
6.9:1
120to130psi.
[8,4a 9,2kg-cm2]
75@ 4000rpm.
15.63
114lb-ft.[15,8kg-m.]
V-6
6
3.750"[9,525cm.]
3.400"[8,636cm.]
225cu.in.[3,69ltr.]
9.0:1
160@,4200rpm.
33748
235lb-ft.[32,49kg-m.]
101" [2,57m.]
48^6*]1,23m.]
67" [1,70m.]
1583/4"[4,02m.]
71%" [1,82m.]
8"[20,32cm.]
CAPACITIES:
U.S.
Imperial
Metric
Fuel Tank (Approximate):
Early Models
Late Models
Cooling System
F4 Models
V-6 Models
Note:Ifnotequipped
with heaterdeduct
10.5gal.
16gal.
12qt.
10qt.
1qt.
8.8gal.
13.3gal.
10qt.
8qt.
.8qt.
39,75ltr.
60,57ltr.
11,4ltr.
9,5ltr.
0,9ltr.
CJ-
3B CJ-5
CJ-6 DJ-5
DJ
-6
lb. kg. lb. kg. lb. kg. lb. kg. lb. kg.
WEIGHTS (Approximate):
Gross Vehicle Weight (GVW).
3500 1587 3750 1701 3900 1769 3200 1451 3200 1451
Shipping — V6 Engine
— '— 2240 1016 2302 1044 1900 862 2033 922
F4 Engine
2132 967 2163 981 2225 1009 1796 814 1858 842
Curb — V6 Engine
— — 2351 1066 2413 1094 2011 912 2144 972
F4 Engine
2243 1017 2274 1031 2336 1060 1907 865 1969 893
For Canvas Half-Top Model,add 35 17 38 17 38 17 38 17 38 17
For Canvas Full-Top Model,add 56 25 56 25 60 27 56 25 60 27
For Hard TopModel,add
~~
340 154 340 154
6

'Jeep* UNIVERSALSERIES SERVICE MANUAL
B
LUBRICATION AND PERIODICSERVICES
Contents
PAR.SUBJECT PAR. SUBJECT
GENERAL .B-l
Chassis Lubrication B-7
Engine LubricationSystemB-4,B-6
Special LubricantsB-2
Fresh Lubricant. .B-3
LUBRICATIONCHARTS . Pages8,9
SERVICE MAINTENANCESCHEDULE. .B-8
Air Cleaner B-2 5, B-2 6
Air Filter — F.E.E.C. SystemCanister B-2 4
Axle U-BoltsB-49
Body Lube Points:B-65
HoodHingePivotPointsB-66
Glove CompartmentDoor Latch B-6 7
TailgateHinges.B-68
Brakes, Adjust.B-41
Brake Linings.B-42
Brake MasterCylinderB-40
Charging Circuit B-l9
Clutch . B-43,B-44
CoolingSystem—Radiator.B-28,B-29
Differentials ........ .B-50,B-51,B-52,B-53
Distributor B-14,B-l5
Engine OilB-9
Engine Oil Filter B-10,B-ll
Engine Tune-UpB-20
Exhaust EmissionControlSystem B-2 2
Exhaust ManifoldHeatControlValve.. . .B-l2
Exhaust System B-23
Fan Belt. .B-21
Front AxleU-JointB-54,B-55
Generator .B-16
HeadlightsB-61
HeaterControlsB-62
Lights andControlsB-59
PositiveCrankcaseVentilationValve.. . .B-l3
ShockAbsorbersB-48
Spark Plugs.B-17
SpeedometerCable..B-60
Spring Bushings... .B-46
Spring Shackles.B-47
Steering Gear B-27
B-l.GENERAL
All 'Jeep'Universalvehiclesrequireperiodic lubri-
cationandothermaintenanceservicesfornormal
vehicle usage andapplicationtopromotesatis-
factoryoperationandprevent excessive wear.Un-
dersevereoperatingoratmosphericconditions
these servicesshouldbeperformedmore often than
undernormalconditions.Itshouldalsoberemem-
beredthatcommonshorttripsand stop-and-go
driving aremoresevereonlubrication points than
Starting Circuit B-l8
Tie RodandDrag Link Sockets . B-45
Tires B-64
Transmission andTransferCase—
Lubricant Level CheckB-30
General B-31
Transfer CaseB-32
Transmission .B-33
Transmission andTransfer Case —
Lubricant Change.B-34
General .B-35
Transfer CaseB-36
Transmission B-3 7,B-38
Transfer CaseLinkageB-39
Universal JointsandSlipJoints. ....... .B-58
Wheel Bearings.. ......... . . .B-56,B-57
Windshield WiperandWasherB-63
LUBRICATION OF
OPTIONALEQUIPMENT B-69
Centrifugal Governor..B-71
PintleHook.B-70
Powr-Lok or Trac-Lok DifferentialB-72
PARTSREQUIRING
NOLUBRICATION. . . .B-73
Alternator Bearings.B-76
Clutch ReleaseBearings. ............. .B-74
ShockAbsorbersB-78
Springs B-7 7
Starter MotorBearingsB-75
Water PumpBearingsB-74
LUBRICATIONREQUIREMENTS
FOROFF-HIGHWAYOPERATIONS B-79
Air CleanerB-82
Chassis Lubrication B-83
Engine OilB-80
Engine Oil Filter B-81
Differentials.B-86
Front AxleU-Joints.B-84
Transfer CaseandTransmission.B-85
constant speed drivingonhighways,andevenmore
intensifiedinextremecoldorhotweather;there-
fore,vehiclesdrivenunder these conditionsmust
belubricated andservicedmore often thannor-
mallyoperatedvehicles.Thespecificationsof types
and amountsoflubricantgivenintheLubrication
Chart and text ofthissectionshouldbeclosely
followed.Theoff-highwayoperationlubrication
notes, giveninthelastpartofthesection,should
befollowedwhenapplicable.
7

B LUBRICATION
D0® ® ® ®
FIG. B-l—-LUBRICATIONCHART — 4-WHEELDRIVE VEHICLES
CHART
NO.
ITEM TOBE
LUBRICATED
10.
11.
13.
14.
Chassis Bearings.. .
Spring Shackleand
PivotBushings...
Universal Joints
PropellerShaft
Front Axle
Steering Gear Housing
Rear WheelBearingstS
Front WheelBearings <S>.
Transmission:
3 Speed
4Speed°
Transfer Case
Differentials
Front.
Rear
SpeedometerCable
Generator — F4
Distributor — F4
Oiler
Wick
Pivot.
Gam
Distributor Cam— V6.
Air Cleaner— F4
— V6
Engine — F4
Engine — V6.
FREQUENCY
1000miles— 1.600km.
Each 2,000 miles
/With Lube Fitting;
(Each 2,000 miles
[Without Lube Fittings:
\NoLubrication
Each 2,000 miles
f Check each 2,000 miles
\ Changeeach 12,000 miles
Check each 2,000 miles
fWith Lube Fittings:
1 Sparinglyeach 2,000 miles
J Without Lube Fitting:
| Disassembletolubricate
\each 12,000 miles
Disassembletolubricate
each 12,000 miles
I Check each 2,000 miles
l Changeeach 12,000 miles
/Check each 2,000 miles
l Changeeach 12,000 miles
!Check each 2,000 miles
\ Changeeach 12,000 miles
f Check each 2,000 miles
\ Changeeach 12,000 miles
. Disassembletolubricate
each 12,000 miles
Each 2,000 miles
Each 2,000 miles
Each 2,000 miles
Each 2,000 miles
Each 2,000 miles
At eachbreakerpointreplacement
/Each 2,000 miles
\Each 6,000 miles
Changeeach 2,000 miles
or60days
Changeeach 6,000 miles
or60days
QUANTITY
U.S. ImperialMetric
As required
As required
As required
As required
As required
As required
As required
2H Pts.2 pts.1,2ltrs.
6H pts.5 M pts.3,2ltrs.
3Mpti« 3 pts.1,5ltrs.
2 M pts.2 pts.1,2ltrs.
2 Yi pts.2 pts.1,2ltrs.
As required
Several Drops
Several Drops
One Drop
One Drop
2c.c.
As required
1H pts.1 pt.0,6ltrs.
4qt.m 314 qt.3,8ltrs.
4qt. 11 3 34qt.3,8ltrs.
LUBRICANT
TYPE
Chassis Lubricant
Chassis Lubricant
Chassis Lubricant
GL3
MIL-L-2105-B
Wheel Bearing Lubricant
Wheel Bearing Lubricant
GL4
GL4
GL4
MIL-L-2105-B
MIL-L-2105-Bttt
Graphite Grease
Engine Oil
Engine Oil
Engine Oil
Engine Oil
Cam Lubricant
Cam Lubricant
Engine Oil
Engine Oil
Engine Oil
GRADE
No.1 No. 1
No.1 No. 1
No.1
SAE-140
No.1
SAE-140
SAE-80
No.2
SAE-
No. 80
2
No.2 No. 2
SAE-90 SAE 80
SAE-90 SAE 80
SAE-90
SAE
80
SAE-80
SAE-80
SAE
SAE
80
80
Light
Sameas engine
Sameas engine
Sameas engine
Sameas engine
SAE-40
or50
SAE-20
Above90 °F.
useSAE30or10W-30
Notlowerthan 32°F. [0°C.|
useSAE20WorSAE10W-30
Between -f-10°F. and90
8F.
useSAE20Wor10W-30 Between
-10°F. and +10°F.
useSAE10Wor10W-20
Between 32eF. [0°C.] and0°F. l-17°Cl
useSAE10WorSAE10W-30
*4-Speedtransmissionandtransfercaserequireseparatelubricationofeachunit.
tttFor Powr-Lok and Trac-Lok differentialuseonly'Jeep*DifferentialOil, Part No.94557.
SI Whenfilterischangedatthesametime,addonequart.
® Donotmixlithiumandsodiumbaselubricants.Uselithiumbaselubricantasspecified
Below -10°F.
useSAE5Wor5W-20
Below0°F.[-17°C.J
useSAE5WorSAE5W-20
8

*Jeep? UNIVERSAL SERIES SERVICE MANUAL
FIG. B-2—LUBRICATION CHART — 2-WHEEL DRIVE VEHICLES
CHART
NO
ITEM TOBE
LUBRICATED
FREQUENCY
1000miles= 1.600km.
QUANTITY
U.S. ImperialMetric
LUBRICANT
TYPE
SummerI Winter
Chassis Bearings.....
Universal Joints......
Steering Gear Housing
Rear WheelBearingsfx
Front Wheel Bearings®
Transmission
Differential
Hand BrakeControl
HandleCable
Hand BrakeControl
Cable Rear
Generator— F4
Speedometer Cable....
Distributor— F4
Oiler
Wick
Pivot
Cam
DistributorCam— V6.
Air Cleaner— F4
— V6. ....
Engine — F4
Engine — V6
Each 2,000 miles
Each 2,000 miles
Check each 2,000 miles
With LubeFittings;
Sparinglyeach 2.000 miles
WithoutLubeFittings:
DisassembletoLubricate
each 12,000 miles
Disassembletolubricateeach
12,000 miles
Check each 2,000 miles
Changeeach 20,000 miles
Check each 2,000 miles
Changeeach 12,000 miles
Each 12,000 miles
Each 12,000 miles
Each 2,000 miles
Disassembletolubricateeach
12,000 miles
Each 2,000 miles
Each 2,000 miles
Each 2,000 miles
Each 2,000 miles
At eachbreakerpointreplacement
Each 2,000 miles
Each 6,000 miles
Changeeach 2,000 milesor60days
Changeeach 6.000 milesor60days
As required
As required
As required
As required
As required
1XApts.114pts.0,7ltrs.
2pts.1% pts.0,9ltrs.
As required
As required
2to4 Drops
As required
Several Drops
OneDrop
OneDrop
2c.c.
As required
1 M pts.1 pt.0,6ltrs.
4qt.**3 H qts.3,8ltrs.
4qt.**3 }A qts.3,8ltrs.
Chassis Lubricant
Chassis Lubricant
MIL-L-2105-B
WheelBearingLubricant
WheelBearingLubricant
GL4
MIL-L-2105-B*
Graphite Grease
Graphite Grease
Engine Oil
Graphite Grease
Engine Oil
Engine Oil
Engine Oil
Cam Lubricant
Cam Lubricant
Engine Oil
Engine Oil
Engine Oil
No.1 No.1
No.1 No.1
SAE-80SAE-80
No.2 No.2
No.2 No.2
SAE-90SAE-80
SAE-80SAE-80
MediumMedium
MediumMedium
Sameas engine
Light
Sameas engine
Sameas engine
Sameas engine
SAE-40
or50
® Above 90°F. Between-f 10°F. and 90°F. Between -10°F. and -fl0°F. Below -10°F.
useSAE30or10W-30useSAE20Wor10W-30useSAE10Wor10W-20useSAE5Wor5W-20
BE St Notlowerthan 32°F. [08C]Between 32°F. 10°C]and0°F. l-17°CI Below0°F.[-17°C]
useSAE20WorSAE10W-30useSAE10WorSAE10W-30useSAE5WorSAE5W-20
•For Powr-Lokand Trac-Lok differentialuseonly'Jeep'DifferentialOil,PartNo. 94557.
**Whenoilfilter ischangedatthesametime,addonequart{one ltr.].
(x)Donotmixlithiumandsodium base lubricants.Uselithium base lubricantsasspecified.
9

B
LUBRICATION
B-2. SpecialLubricants
Special lubricantsarerequiredforcertain lubri-
cationpointsonthe'Jeep'Universalvehicles.The
special lubricantsarenecessaryforproperfunction-
ingandmaintenanceofthevehicle.The Lubrica-
tion Chart (Fig.B-landB-2) designates thespe-
cial lubricatingpointsandidentifiesthembytype
or partnumber.
B-3. Applying Fresh Lubricant
When servicingorlubricatingthevehicle,itis
importantthatalloldlubricantand dirt bere-
movedfromthefittingand/orplugsbeforeservic-
ingandthattherecommendedtypeoflubricant
beusedfortheparticularitembeingserviced.
Force lubricantthroughthelubefittingsuntil
thelubricantbeingforcedoutofthejointisfresh
lubricant, indicatingthatalloldlubricanthas
beenremoved.
B-4. Engine Lubrication System—
Hurricane F4Engine
• RefertoFig.B-3.
The engine oilpressuresystemisdesignedtopro-
videadequatelubricationtoallworkingpartsof
theengine.Thegear-typeoilpumpisdrivenfrom
the engine camshaft.Thepumpisprovidedwitha
FIG. B-3—ENGINE LUBRICATION SYSTEM —
HURRICANE F4 ENGINE
floating,screenedintakethatpreventsthe circula-
tionofanysedimentthatmightaccumulateinthe
oil pan.Bymeansofthispump,themainbearing
journals andcrankpinsareefficientlylubricated
throughanoilgalleryandpassagesinthecylinder
block. Oil isforcedunderpressuretothemainbear-
ingsandthroughthecheeksofthecrankshaftto
theconnectingrodbearings.Oilisalsoforce-fed
tothecamshaftbearings,timinggears,andintake
valverockerarms.Theoilpressureiscontrolledby
relief valvelocatedintheoilpump.Thevalveis
designedtoopenwhenexcessivepressure develops
in thesystem,relievingthepressureandreturning
the excess oiltotheoilpan.Thecylinderwalls,
pistonpins,andtappetsaresuppliedwithoilfrom
spurt holes intheconnectingrods.A portionof
theoiliscontinuallypassedthroughanoilfilter
which effectivelyremovesanyforeignmattersus-
pendedintheoil.A flangedsectiononthe rear of
thecrankshaftactsasanoilslingerand,incom-
binationwiththe rear mainbearingupperand
loweroilseal,preventstheleakageofoilfromthe
rear endofthecylinderblock.Leakageofoilfrom
thefrontendofthecylinderblockiscontrolled
bythecrankshaftoilslingerandthefrontoilseal
installedinthetiminggearcover.Theoilpressure
indicator lightintheinstrumentpanelandtheoil
level gauge ordipstickinthesideofthe engine
providea meansforcheckingtheoilpressureand
oil level.
B-5. OilPressureGaugeorIndicator
On early CJ-3B vehiclesanoilpressure gauge is
mountedontheinstrumentpanel. This gauge in-
dicatestheoilpressurewithinthe engine lubri-
catingsystem.
On Models CJ-5, CJ-5A, CJ-6, CJ-6A, DJ-5,DJ-6
and laterproductionvehiclesofModel CJ-3B a
red telltalelamp,whichoperateswhentheignition
switchisturnedon,islitwhenthereisinsufficient
oil pressuretoproperlylubricatetheengine.When
it goes out,operatingpressureisachieved.In
normal operation,thelightislitwhentheignition
isfirstturnedon.It goes outafterthevehicleis
in motion.
Failure ofthe gauge orindicatortoregisternormal
oil pressuremayindicateinsufficientsupplyofoil
in the engine crankcase,lowornooilpumppres-
sure, ora faultinthe gauge orindicatorelectrical
circuit. The engine mustbestoppedimmediately
topreventpossibledamageto engine bearingsand
thefaultcorrectedbeforerestartingtheengine.
B-6. Engine Lubrication System—
DauntlessV-6Engine
The engine lubricationsystem(Fig.B-4)isthe
force feed typeinwhichoilissuppliedunderpres-
sure tothecrankshaft,connectingrods,camshaft
bearingsandvalvelifters.Oilissuppliedundercon-
trolledvolumetotherockerarmbearingsandpush
rods. Allothermovingpartsarelubricatedby
gravityfloworsplash.
The supplyofoilis carried intheoilpanwhich
isfilledthrougha filteropeningintheright rocker
arm cover.A removableoil gauge rodontheleft
sideofthecrankcaseisprovidedtocheckoillevel.
The oilpumpislocatedinthetimingchaincover
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