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
10

'Jeep* UNIVERSAL SERIES SERVICE MANUAL
13330
FIG. B-4—ENGINE LUBRICATION SYSTEM —
DAUNTLESS V-6 ENGINE
1— Rocker ArmShaft
2— Main Oil Line
3— Oil Inlet
whereitisconnectedbya drilledpassageinthe
cylinder crankcasetoanoilscreenhousingand
pipeassembly.Thescreenissubmergedintheoil
supplyandhasampleareaforalloperatingcondi-
tions.Ifthescreenshould become clogged forany
reason,oilmaybedrawnintothesystemoverthe
top edge ofthescreen,whichisheldclearofthe
sheet metalscreenhousing.
Oil isdrawnintothepumpthroughthescreenand
pipeassemblyanda drilledpassageinthe crank-
case,whichconnectstodrilledpassagesinthe
timingchaincover.Alloilisdischargedfromthe
pumptotheoilpumpcoverassembly.Thecover
assemblyconsistsofanoilpressurereliefvalve,
an oilfilterbypassvalveanda nippleforinstalla-
tionofanoilfilter.Thespringloadedoilpressure
relief valvelimits theoilpressuretoa maximum
of30pounds[13.607kg.]persquareinch.The
oil filterbypassvalve opens whenthefilterhas
become clogged tothe extent that 4V2 to5 pounds
[2.04a 2.27kg.]pressuredifferenceexists between
thefilterinletandexhausttobypasstheoilfilter
and channelunfilteredoildirectlytothemainoil
galleriesoftheengine.
A fullflowoilfilterisexternallymountedtothe
oil filtercovernippleontherightsideoftheen-
gine,justbelowthealternator.Normally,all engine
oil passesthroughthefilterelement;however,if
theelement becomes restricted,a springloaded
bypassvalve opens asmentionedabove.Themain
oil galleriesrunthefulllengthofthecrankcase
and cutintothevalvelifterguide holes tosupply
oil atfullpressuretothelifters.Connectingpas-
sages drilledinthecrankcasepermitdeliveryof
oil atfullpressuretoallcrankshaftandcamshaft
bearings.
Holesdrilledinthecrankshaft carry oilfromthe
crankshaft bearingstotheconnectingrodbearings.
Pistonsandcylinderwallsarelubricated byoil
forcedthrougha smallnotchinthebearingparting
surfaceontheconnectingrod,whichregisterswith
the hole inthecrankpin once ineveryrevolution.
Pistonpinsarelubricatedbysplash.
Drilled holes inthecamshaftconnectthefront
camshaftbearing journal tothekeyslotinthefront
ofthecamshaft.Oilflowsfromthe journal into
thekeyslotoverthewoodruffkeyinthespace
between thekeyandthecamshaftsprocketand
fuelpumpeccentric.
The forwardendofthefuelpumpeccentricin-
corporatesa reliefwhichallowstheoiltoescape
between thefuelpumpeccentricandthecamshaft
distributor gear.Theoilstreamstrikesthedistri-
butorshaftgear once eachcamshaftrevolution,and
providesamplelubricationofthetimingchainand
sprocketsbysplash.
The rockerarmsandvalvesoneachcylinderhead
are suppliedwithoilfromtheoilgalleriesthrough
holes drilledinthefrontofthecylinderblockand
cylinder head.The hole drilledinthecylinder
headendsbeneaththefrontrocker arm shaftbrack-
et.A notchcastinthebaseoftherockerarmshaft
bracket allowstheoiltoflowupinsidethebracket
in thespace between thebracketandbolt,tothe
hollowrockerarmshaftwhichispluggedatboth
ends. Each rockerarmreceivesoilthrougha hole
in theundersideoftheshaft.Groovesintherocker
arm providelubricationofthebearingsurface.Oil
ismeteredtothepushrodseatandvalvestem
through holes drilledintherockerarm.Excess
oil drainsoffandreturnstotheoilpanthrough
passagesinthecylinderheadandblock.Referto
the Lubrication Chart forlubricationfrequencyand
lubrication typeandgrade.
B-7. Chassis Lubrication
Chassis and engine shouldbeservicedatperiodic
intervals. Mostchassis lubricatingpoints,whether
long-lifeorconventional,havestandardlubrication
fittings.Refertothe Lubrication Specificationsand
Service MaintenanceScheduleforspecificpoints
and lubricatingtimeintervals.Itisnotnecessary
todisassembleprepackedjointstolubricatethem.
Merely addnewlubricant,asdescribedinPar.
B-3, toremovealloldlubricant.
At theappropriateinterval,cleaneachlubrication
fittingindicatedontheLubrication Chart and
Service MaintenanceSchedule.Usea pressuregun
tolubricate.Besurethegreasechannelsareopen
toprovidecompletelubricationofbearingsurfaces.
In some casesitmaybenecessarytodisassemble
toclearpluggedchannels.
When vehiclesaredrivenprimarilyinabnormally
dustyorwetareasorwhena vehicleissubjectto
severeoperatingconditions,perform these services
morefrequently.Under these conditions,no
definiteintervalcanberecommendedbecauseof
thegreatvarietyof uses andconditionsofuse.
11

B LUBRICATION
B-3. SERVICE MAINTENANCE SCHEDULE
Perform thefollowingoperationsatthemileage
shown.Twothousandmilesequals 3,200 km.
SERVICE MAINTENANCE SCHEDULE
OPERATION
VEHICLE ^ n> MILEAGE IN THOUSANDS
68 10122430
CheckWheelNutTorque*
Check Fluid Level inBatteryX
Check Fluid Level inBrakeMasterCylinder0.X
Service Cooling SystemX
ServiceTiresX
Lubricate Distributor CamLubricator(F4-134)X
Lubricate SteeringLinkageX
Lubricate PropellerShaftUniversalJointsX
Lubricate PropellerShaft Slip Joints; X
Lubricate TieRodandDrag Link Sockets...................................X
ChangeEngine Oil and Filter, andServiceAirCleaner(F4134Engine)**X
ChangeEngineOiland Filter, andServiceAirCleaner(V6-225Engine)**....
CheckBrakeOperationandPedal Free PlayX
Check Clutch Pedal Free Play.....X
Checkall V-Belt TensionsX
CheckExhaustEmissionSystem (If soequipped)***\ X
ServicePositive Crankcase Vent Valve andBreather. .' X
RoadTest Including a CheckofallInstrument Lights andControlsX
Tune-upEngine
CheckOperationof Manifold Heat Control Valve
Clean ExteriorofRadiator
Align Headlights•
CheckBrake Linings ,
CheckExhaustSystemforLeaks
ReplaceCanisterAir Filter (F.E.E.C.System)
Check Axle U-Bolt Torque.
CheckLubricaunt Level ofFront Axle UniversalJoints
CheckShockAbsorberMountingsandBushings
CheckFrontand Rear SpringBushings
Lubricate Distributor (V6-225).
ReplaceSpark,Plugs
CheckChargingandStartingCircuits
Lubricate TailgateLatch,SupportsandHinges.
Lubricate Doorand Hood HingePivots;
Lubricate GloveCompartmentDoorLatch
Lubricate HeaterControls•
Lubricate Windshield WiperandWasherControls
Clean, Repackand Adjust WheelBearings
ChangeTransmissionandTransferLubricant..
Replace Dry-Type AirCleaner•
CheckLubricant Level of Differential
Lubricate Transfer Case Shift LeArer Control C«se. . , . . . . . . . .
Continuing each 2,000miles
Continuing each 6,000miles
Continuing each 24,000miles
X Continuing each 30,000miles
•Checkafterthe first 200miles[320 km. J ofoperation.
If wheelorwheelsarechangedforany reason, have wheelnuttorquerecheckedafteranadditionaltwohundredmilesofoperation
••Servicemileageshownorevery60days,whicheveroccurs first.
•••Maintenancecheckonemissionsystemmustbeperformedper information inthismanual.
"Seetextforbrakes.
"Nj ^Miles
2,000
6,000
12,000
18,000
24,000
30,000
Kilometers
3,200
9,600
19,200
28,800
38,400
48,000
B-9. EngineOil
For maximum engine protectionunderalldriving
conditionsencounteredduringtherecommended
oil changeintervals,itisnecessarytouseonly
"MS" certified sequence-tested oils.Theterm
"MS" mustappearontheoilcontainersingly or
in conjunctionwithotherdesignations."MS"des-
ignatedoilsareheavy-dutydetergentoilsthatare
formulatedtowithstandallserviceconditionsin
modernpowerplants.Engineoilsdesignatedonly
as "ML" and/or "MM" arenotrecommendedand
shouldnotbeusedexceptinanemergencywhen
"MS" oilisnotavailable.Certified sequence-tested
engine oilsaredescribedontheircontainersby
such phrasesas: meets, exceeds, excels,orhas
provensuperiorinthe test requirements, test
sequences,MSService tests, standards,andservice
requirements, ofautomotivemanufacturers,auto-
makers, orcarmanufacturersforMSserviceor
Service MS.
It maybenecessarytochange engine oilmore
frequentlythannormallyrecommended,depending
uponthetypeandqualityofoilused,theseverity
ofoperationconditions,ifthe engine isusedfor
short periodsincoldweather,orifthe engine is
allowedtoidleforexcessiveperiods.
Always drain thecrankcasewhilethe engine is
hotsince dirt andcontaminantsarethenmore
likely tobeheldinsuspensionandtherefore will
drain outmorecompletely. Drain thecrankcase
asfollows:
a. Positionthe drain receptacleunderthe drain
plug.
b. Removethe drain plugusingthecorrectsize
wrench. Becarefulofhotoil.
c. Carefully cleanthe drain plug.Inspectand
replace thegasket,ifdeteriorated.
d. Whentheoilhasdrained,replaceandtighten
thecrankcase drain plug.
12

'Jeep' UNIVERSAL SERIESSERVICE MANUAL
B
e. Check forthepresenceof excess waterinthe
oil thatmightindicateaninternalleakfromthe
coolingsystem.
f. Pouroilintotheoilfillertube.Replacetheoil
filler cap.
B-10. EngineOil Filter Service—
Hurricane F4Engine
The engine oilfilterassemblyshouldbereplaced
ateach 2000 miles [3.200 km.]ofnormal engine
use.Toremovethefilter,useoilfilterwrench
C-4065. Toinstalla newfilter,wipethegasket—
contactsurfacewith engine oil,screwontheunit
until gasketcontactsthesealingsurface,andthen
tightenatleastone half turn more.DONOTUSE
TOOLS. Turn byhandonly.Whenrefillingthe
engine crankcaseafterfilterhasbeenchangedbe
sure toaddoneextraquart[1ltr.]ofoilto fill
filter andoilpassages.Run engine tomakesure
thereisnoleakatoilfilter.
B-l1. EngineOil Filter Service—
DauntlessV-6Engine
To replacetheoilfilter,useoilfilterwrench,Tool
C-4065, toremovethefilter.Afterthefilterhas
beenremovedfromtheoilpumphousinglocated
ontherightfrontsideoftheengine,wipethe
housingsurfacecleanandoilthegasketonthe
baseofthenewfiltertomakea good seal.Screw
thenewfilterinpositionuntilitsgasketcontacts
thepumphousingsurface,then tightenatleast
one-half turn untilfilterfitssnug.
Note: Tightenbyhandonly,donotusea toolto
tighten.
Replace oilfiltereach 6000 miles [9.600 km.]at
engine oilchange.
B-12. Exhaust Manifold Heat Control Valve —
DauntlessV-6Engine
A thermally-actuatedheatcontrolvalveislocated
at rear oftherightexhaustmanifoldoftheDaunt-
less V-6engine. This valvehasa bimetalthermo-
staticspringwhichholdsthevalveclosedwhen
the engine iscold.
Each timethevehicleislubricated placea few
dropsofpenetratingoilonthevalveshaftbushings
and thenworkthevalvebyhandmakingsurethat
thelubricantisworkedintothebushings.
Note: Ifthevalveshaft does notoperatefreely
penetratingoilshouldbeusedtofreetheshaft.
B-l3. Positive Crankcase Ventilation System
Service theventilationsystemofthe engine each
multipleof 6000 miles [9.600 km.]ontheodometer
after initial 2000 miles [3.200 km.]service.Re-
placetheventilationvalveeach 12,000 miles
[19.200 km.].
For informationonservicingthepositivecrankcase
ventilationsystemonthe Hurricane F4 engine and
theDauntlessV-6engine,refertotheTune-up
Section.
B-l4. Distributor — HurricaneF4Engine
The distributorshaftislubricatedthroughanoiler
mountedonthesideofthehousing.Placethreeor
fourdropsoflight engine oilintheoilereach 2,000
miles [3.200 km.].Alsoplaceonedropoflight
engine oilonthewicklocatedonthetopofthe
shaft,whichismadeaccessiblebyremovingthe
rotor arm.Sparinglyapplycamlubricanttothe
breaker armcamandplacea dropofoilonthe
breaker armpivot.
B-l 5. Distributor — DauntlessV-6Engine
The distributorhasa lubricantreservoirthat car-
ries sufficient lubricant forthelifeofthedistributor.
When servicingbreakerpoints,placeonedropof
light engine oilonthewicklocatedonthetop
oftheshaftAlso,applycamlubricantsparinglyto
thebreakerarmcam,andplacea dropofoilonthe
breaker armpivot.
B-l6. Generator
On earlyproductionvehiclesoilersareprovided
ateachendofthegenerator,forlubrication pur-
pose. Onlateproductionvehiclesoneoilerispro-
videdatthe rear (bushingend)ofthegenerator
forlubricationpurpose.Placetwotofourdropsof
light engine oilineachoilerevery 2,000 miles
[3.200 km.].
B-l 7.SparkPlugs
Replace spark plugs.RefertoSectionC.
B-18. Starting Circuit
Check thestarting circuit. RefertoSectionH.
B-l 9.Charging Circuit
Check thecharging circuit. RefertoSectionH.
B-20. EngineTune-Up
Refer toSectionC ofthismanual.
B-21. Adjust Fan Belt
Refer toSectionC.
B-22. ExhaustEmission Control Systemor
Controlled CombustionSystem
• Refertotheappropriatesectioninthismanual.
B-23. ExhaustSystem
Check theexhaustsystemforleaks.Referto
SectionF.
B-24. FuelEvaporativeEmission Control
CanisterAir Filter
The onlyservicerequiredforthe F.E.E.C. system
iscleaningtheaircleanerfiltermountedatthe
bottom ofthecanister.Thefilterrequiresreplace-
mentat 12,000 mileintervals.RefertoSection
E, Par.E-9forserviceprocedure.
B-25. OilBathAirCleaner
Some'Jeep'Universalvehiclesareequippedwith
an oilbathtypeaircleaner. This typeaircleaner
thoroughlyremovesalldustfromtheairbeforeit
entersthecarburetor,ifitisproperlyserviced.
When thevehicleisoperatedundernormalcondi-
tionstheaircleanermustbeservicedatregular
intervals ascareoftheaircleanerisextremely
13

LUBRICATION
vital tothelifeofthe engine. Whenthevehicle
isoperatedunderabnormalconditions,(forex-
amplewhendrivenonsecondaryroadsorthrough
fields)then serviceoftheaircleanermustbe
morefrequent
Note: Underextremecontinuallydustyanddirty
conditionswherethevehicleoperatesincloudsof
dustand dirt, servicetheaircleanerdaily.
a. Toservicetheaircleaneronvehiclesequipped
withthe Hurricane F4 engine (Fig.B-5)unscrew
theeye bolt ontheoilcupclampandremovethe
oil cupfromthecleanerbody.Removetheoil
fromthecupandscrapeall dirt fromtheinside,
washcupcleanusinga cleaningsolutionifneces-
sary. Insummer refill theoilcupwithIV2 pints
[0,6ltrs.]of SAE-40 or50grade engine oil.In
winter refill usinggrade SAE-20 engine oil.For
servicingtheaircleaner body (less oilcup), loosen
hose clampandremove hose fromthecleaner.
Detachbreather hose fromthefittingonthe
cleaner.Removethetwowingscrewsandliftthe
cleanerfromthevehicle.Agitatethecleaner body
thoroughlyincleaningsolutiontocleanthefiltering
element. Dry element withlowpressurecom-
pressedair.Reinstallthecleaner body andreplace
theoilcup.Servicetheaircleanerevery 2000 miles
[3.200 km.].
b.Toservicetheoilbathaircleaneronvehicle
equippedwiththeDauntlessV-6 engine (Fig.B-6),
first removetheaircleanerfromthecarburetor
byunscrewingthewingnut.Removetheoilcup
FIG. B-5—OIL BATHAIR CLEANER -
HURRICANEF4ENGINE
1— Horn 7—Clamp
2— Flexible Connector 8—Oil Cup
3— Hon Clamp 9—Clamp
A—Carburetor VentTube10—Hose
5—Body11—Clamp
6— Screw and Lock Washer13—Gasket
FIG.
B-6—OILBATHAIR CLEANER -
DAUNTLESSV-6ENGINE
1—WinB Nut
2— Cover
3— Rubber Gasket
4— Cork Gasket
5— Oil Cup
6— Breather
7— Clamp
8— Vent Tube
9— Air PumpHose
fromcleaner body andremovetheoilfromthecup,
scrapeall dirt fromtheinside. Clean oilcupthor-
oughly,washfilter element ina solventthat will
leaveitcleananddry. Fill oilcuptoindicated
levelwithclean S.A.E. 40or50grade engine oil
(S.A.E. 20gradeinwinter.)Assemblecleanerfilter
element tooilcupmakingsurethatgasketisin
place between thetwopieces.Assembleaircleaner
assemblytocarburetormakingsurethegasket be-
tween aircleanerandcarburetorisinplace.Secure
air cleanertocarburetorwithwingnut.Servicethe
air cleanerevery 6000 miles [9.600 km.],
c. Carefully checkthe hose clampsand fittings on
thebreather hoses atfrequentintervals.Loosecon-
nections will affectproperoperationofthe crank-
caseventilatingsystem.
B-26.Dry-Type AirCleaner
ServicetheaircleaneronDauntlessV-6 engines
ateachoilchangeundernormaldrivingconditions.
If thevehicleisoperatedunderdustyconditions,
checktheconditionoftheaircleaner element more
frequentlyandserviceifdirty.
Servicing theaircleanerconsistsofcleaningor
replacingtheaircleaner element andreplacingthe
crankcase ventilationfilter(breatherassembly).
SeeFig.B-7.
The aircleaner element assemblyconsistsofa
paper element anda polyurethane element The
paper element cannotbecleaned.
To cleanthepolyurethane element, firstcarefullly
removeitfromthepaper element Then washitin
14

'Jeep* UNIVERSALSERIESSERVICE MANUAL
B
solvent. Wrap thepolyurethaneelementina clean
dry clothand squeeze toremoveallpossiblesol-
vent.Donotwringtheelementoritmay become
torn. Aftercleaning,oilthepolyurethaneelement
liberally with engine oil (SAE 10W30)and squeeze
toevenlydistributetheoilthroughtheelementand
toremove excess oil.Theelementshouldbedamp
with oil,notdripping. Install thepolyurethane
elementonthepaperelement,takingcaretohave
edges ofthepolyurethaneelementovertheplastic
endplatesofthepaperelement.
Replace thecompleteaircleanerelementassembly
every 24,000 miles [38.400 km.].Replacemore
frequentlyifthereisanyapparentdamageor
evidenceofplugging.
The crankcaseventilationfiltershouldbereplaced,
notcleaned,every 6,000 miles [9.600 km.].The
filter islocatedinsidetheaircleanerhousing.
12992
FIG. B-7—DRY-TYPE AIR CLEANER
DAUNTLESS V-6 ENGINE
1— Crankcase Ventilation Filter
2— Polyurethane Element
3— Paper Element
B-27. Steering Gear
Check thatthesteeringgearlubricantisatthe
levelofthefill-hole.Ifnot,addlubricanttothe
levelofthefill-holewiththelubricantrecom-
mendedinthe Lubrication Specifications.Ifabnor-
mally low,checkthesteeringgearforpossibility
ofleaks.
B-28. CoolingSystem
Check thecoolantlevelinthe radiator. Itshouldbe
half aninchbelowtheneck.Ifnot, fill theradiator
to half inchbelowtheneckwiththepropercoolant.
Refer toSectionG.
If thelevelofthecoolantisabnormallylow,check
theradiator, hoses andwaterpumpforpossible
leaks. Ifa leakissuspected,refertoSectionG.
B-29. Clean Exterior ofRadiator
For propercoolingefficiencytheradiatorshould
becleanedofforeignobjects.RefertoSectionG.
B-30. Transmission and TransferCase
Lubricant Level Cheek
• RefertoPar.B-31throughB-33asapplicable.
B-31. General
All transfercasesandtransmissionsshouldbe
serviced separatelyeventhoughdrilledpassages
are providedforoilcirculation between some trans-
missionandthetransfercasehousings.Procedure
from theappropriatePar.belowshouldbefol-
lowedtocheckthelubricantlevelofthevarious
types oftransfercasesandtransmissions.
If thetransfercaseortransmissionfluidlevels
are foundtobeabnormallylow,checkbothunits
foranypossibleleaks.
B-32. Transfer Case :
The transfercasefill-holeislocatedontheright
sideofthetransfercasehousing.Tocheckthe
lubricant level,removethe fill plug. Lubricant
shouldbelevelwiththisfill-hole.Ifnot,bring
uptolevelbyaddingmake-uplubricantasspecified
in the Lubrication Specifications.
B-33. Transmission
The transmissionfill-holeislocatedontheright
sideofthetransmissionhousing.Tocheckthe
lubricant level,removethe fill plug. Lubricant
shouldbelevelwiththisfill-hole.Ifnot,bring
uptolevelbyaddingmake-up lubricant asspecified
in the Lubrication Specifications.
B-34. TransmissionandTransfer Case
Lubricant Change
• RefertoPar.B-35throughB-37asapplicable.
B-35. General
Transfer caseandtransmissionlubricantsshould
bechangedatthesametime.
B-36. Transfer Case
To drain thetransfercase,firstremovethetransfer
casefill-holeplugandthen thetransfercase drain-
hole plug.Letallfluid drain fromcase. Then install
thetransfercasedrainholeplug,and refill the
transfer casethroughthefill-holeusingthecorrect
lubricant asspecifiedinthe Lubrication Specifica-
tions.
At 30,000 mile [48,000 km.]intervalslubethe
transfer caseshiftleverswith Lubriplate No.
130AA. Late modelshavea lubefitting.Tolube
oldermodels,(withoutlubefitting)removethe
bottom coverofthecase,cleanthoroughlyand
pack case full oflubricant.
B-37. Transmission(3-Speed)
To changethelubricantonallvehiclesequipped
with a threespeedsynchromeshtransmission, drain
theoldfluidbyfirstremovingthefill-holeplug
and thenremovingthedrainholeplug.Sinceon
some transmissionstherearedrilledpassagesbe-
tweenthetransmissionandtransfercasethatallow
oil tocirculate between thetwounits,thetransfer
caseshouldbedrainedbeforerefillingthetrans-
mission.
When allthefluidiscompletelydrained,replace
thedrainholeplugsonly.Forthecorrectspecifi-
cationsandquantity,refertothe Lubrication
Specifications.
15

B
LUBRICATION
Note: Hard shiftingofthetransmissiongearin
coldweatherisa positiveindicationthatthe lubri-
cant isofthewrongviscosityorofpoorquality
which allowsittocongeal.
B-38. Optional 4-Speed Transmission
and TransferCase
The four-speedtransmission andtransfercasere-
quire separatelubricationforeachunitas they
havenocross-overoilpassage.Ateachtransmission
servicecheck,the fill plugsof both four-speed
transmission andtransfercaseshouldbepulled
and thelubricantrefilledtolevelifnecessary.
B-39. Transfer Case Linkage
The transfercaseshiftlinkageshouldbelubricated
periodically. All bearingsurfacesthatareassembled
with studsandcotterpinsshouldbedisassembled,
cleaned,andcoatedwitha good waterproofgrease.
The bearingsurfacesthatcannotbedisassembled
shouldbelubricatedwitha lubricantthat will
penetratethebearing area. Thesebearingsinclude
thetwoonthecrossshaftassemblyandthe
threadedstud.
The type ofpenetratinglubricantrecommendedis
DuPont "PM7",No.2911,oritsequivalent.
B-40. BrakeMasterCylinder
Clean thetopofthe fill capandalsothehousing
area aroundit.Removethecapandobservethe
fluid level.Itshouldbe half aninch below thetop
ofthefill-hole.Ifnot,addbrakefluidto half
inch [1,3cm.] below thetopofthefill-hole.Use
onlyheavy-dutybrakefluidconformingtospeci-
fication SAE-J-1703. Besuretohandlethebrake
fluid incleandispensersandcontainersthat will
notintroduceeventhe slightest amountofother
liquids orforeignparticles.Replaceandtighten
the fill cap.
B-41. AdjustBrakes
Refer toSectionP.
B-42. BrakeLinings
Refer toSectionP.
B-43. AdjustClutch
Refer toSectionI.
B-44. ClutchCrossShaft(LeverType)
Lubricate theclutchcrossshaftinaccordancewith
specificationsgiveninthe Lubrication chart:see
Item 1.ChassisBearings.
B-45. TieRodandDrag Link Sockets
The tierodanddrag link sockets areequipped
with lubrication fittings andshouldbelubricated
per specificationsgiveninthe Lubrication chart:
seeItem1.ChassisBearings.
B-46. Front and RearSpring Bushings
The conditionofthespringbushingsisindicated
bythealignmentofthespringpivotandspring
shackle bolts. Check thealignmentof these bolts,
and checkthatnutsare tightened securely.
B-47. Spring Shackles
Rubber bushingsareprovidedonthespring
shackles. Theserubberbushingshavenolubrication
fittinganditisveryimportantthat they never
belubricated.
B-48. ShockAbsorbers
Visually checkforbrokenmountsorbolts,worn
or missingbushingsontheshockabsorbers.Refer
toSectionS.
B-49. Frontand Rear Axle U-Bolts
Torque thefrontand rear axleU-bolts.Referto
SectionS.
B-50.Front and Rear Axle Differentials —
LubricantLevels
The lubricant levelofallfrontand rear differentials
shouldbeatthelevelofthefill-hole.
B-51. Frontand Rear Axle Differentials —
Changing Lubricant
B-52. ConventionalDifferentials
To removethelubricantfromthefrontor rear
differential, itisnecessarytoremovethehousing
cover.Letthelubricant drain out,andthenflush
thedifferentialwitha flushingoilorlight engine
oil tocleanoutthehousing (except Powr-Lok
or Trac-Lok Differentials).Donotusewater,steam,
kerosene,or gasoline forflushing.
Reinstall thehousingcover,replacingthegasket
whenevernecessary,torquingthecover bolts to
15to25lb-ft.[2,1a 3,4kg-m.].
Removethefillerplug,and refill thedifferential
housingasspecifiedinthe Lubrication Specifica-
tions.
B-53. Powr-Lok or Trac-LokDifferential
Somevehiclesmaybeequippedwiththe Powr-Lok
or Trac-Lok Differentialasoptionalequipment.
Special lubricantandordinarymultipurposegear
lubricants must not beused.Useonly 'Jeep* Differ-
ential Oil, Part No.94557.
Powr-Lok or Trac-Lok differentialsmaybecleaned
onlybydisassemblingtheunitandwipingwith
clean rags.Donotflushtheunit.RefertoSec-
tionN.
B-54. FrontAxleUniversalJoint — Lube
Check thelevelofthefrontaxleuniversaljoint
lubricant ateachfrontwheelbyremovingthe
fill-holeplug.Thelubricantshouldbelevelwith
thefill-hole.Ifrequired,addlubricantasspecified
in Lubrication Specifications.
B-55. Front Axle Universal Joint — Service
On all4-wheeldrivevehiclesthefrontaxle uni-
versal jointshouldbeservicedbyremovingthe
shaftandthoroughlycleaningtheuniversaljoints
and housing.Forthecorrectprocedures,referto
SectionM.
16

'Jeep' UNIVERSALSERIESSERVICE MANUAL
B
Reinstall theaxleshafts,and refill thehousingsto
pluglevelusingtheuniversaljointlubricant
specifiedin Lubrication Specifications.
B-56. Front AxleWheelBearings
To lubricatethewheelbearings,itisnecessary
toremove,clean,repack,andadjustthem.When
frontwheelhubsandbearingsareremovedfor
lubrication, theyshouldbethoroughlywashedina
suitablecleaningsolvent.Thebearingsshouldbe
carefully driedandthengivena thoroughcleaning
and inspection.Usea cleanbrushtoremoveall
particles ofoldlubricantfrombearingsandhubs.
After thebearingsarecleaned,inspectthemfor
pittedracesandrollers.Also,checkthehuboil
seals.
Note: Wheelbearinglithiumbaselubricantsare
usedatthefactoryfor initial fill of these bearings.
When lithiumbaseandsodiumbaselubricantsare
mixed, theresultisa thinned-outmixturethat
can bleedthroughseals.Itisthereforeimportant
thatlubricantswiththecorrectbasebeusedwhen
lubricating thewheelbearings.
Should leaksoccuratwheelbearingseals,theleaks
may becausedbya mixtureoftwo types of lubri-
cants. Insuchcases,theoldlubricantshouldbe
completelyremovedbeforenewlubricantisadded.
Wheel bearingsshouldbethoroughlycleaned,
lubricated withlithiumbaseandreinstalled.
Repack thebearing cones androllerswithgrease
and reassemblehubinthereverseorderofthe
disassembly.Testthebearingadjustmentasout-
lined inSectionQ.
B-57. Rear AxleWheelBearings
The Rear wheelbearingsanearlymodelsequipped
with lubricationfittingswitha ventopening
throughthehousingsaboveeachfittingshouldbe
lubricated sparingly,each 2,000 miles [3.200 km.].
Use a handcompressorandwheelbearinggrease,
forcing thegreasethrougheachlubricationfitting
until itflowsfromthevent.Ventshouldbekept
clear ofobstructionorgrease will backupintothe
brakes. Donotaddgreaseafteritflowsfromthe
ventforitmaybeforcedthroughthewheelkey-
way onto theoutsideofthewheelandpossibly
onto thebrakelinings. Rear wheelbearingsthatdo
nothavelubricationfittingsshouldberemoved
each 12,000 miles [19.200 km.]andthebearing
cleaned,inspectedandrepacked. Refertoproce-
dure inPar.B-56.
Note: WhenservicingtheFlangedAxleUnit Bear-
ingAssembly,refertoSectionN,Par.N-5for
proper lubricationprocedures.
B-58. PropellerShafts and UniversalJoints
The propellershaftslipjointsanduniversalsshould
belubricatedwitha handcompressorgreasegun
soastonotdamagethebearingseals.Theunits
shouldbelubricatedwitha good qualitygrease.
Refer tothe Lubrication Chart forlubricationfre-
quencyandlubricanttypeandgrade.
B-59. Lights and Controls
a. Check allinteriorandexteriorlightsandlight
switchesforproperoperation,including:parking
lights,headlamps(highbeamandlowbeam),
tail lights,brakelights,directionallights,andin-
strumentpanellights.
b. Check allinstrumentpanelcontrolsand instru-
mentsforproperoperation.
B-60. SpeedometerCable
Removethe speedometer cablefromitshousing
every 12,000 miles [19.300 km.]. Clean itthor-
oughlyandcoatitwitha good qualitylightgraphite
grease.
B-61. Headlights
Refer toSectionH.
B-62. HeaterControls
Apply Lubriplate 130-Atoallfrictionpointsand
pivotpointsontheheatercontrolspanelunit
aswellasthepivotpointsatthedashpot.Apply
a fewdropsofpenetratingoilallalongtheBowden
cable. This oil will penetrateintothecenterwire.
B-63. WindshieldWiperand WasherControls
Lubricate thefrictionpointsandthepivotpoints
onthewindshieldwipertransmissionandlinkage
arms witha slightamountof Lubriplate 130-A.
B-64. RotateTires
Refer toSectionQ forthecorrectmethodofrotat-
ingthetires.
B-65. BodyLubePoints
• RefertoPar.B-66throughB-68.
B-66. HoodHingePivotPoints
Lubricate thefrictionalpointsofthehoodhinge
pivotpointswitha fewdropsoflight-weight engine
oil.
B-67. GloveCompartmentDoorLatch
Sparingly wipe Lubriplate 130-Aonthe glove com-
partmentdoorlatch.
B-68. TailgateHinges
Lubricate thefrictionpointsofthetailgatehinges
with a fewdropsoflight-weight engine oil.
B-69. LUBRICATION OF OPTIONALEQUIPMENT
B-70. PintleHook
When lubricatingthevehicle,placea fewdrops
ofoilonthepintlehookandsafetylatchpivotpins.
B-7!. CentrifugalGovernor
Check theoillevelinthegovernorhousingateach
vehiclelubrication.Usethesameseasonalgrade
oil asisusedinthe engine andchangeoilateach
engine oilchange.Donot fill thehousingabove
thelevelindicatingplugopening.Keepthevent
in thefillerplugopenatalltimes.
17

B
LUBRICATION
B-72. Powr-Lok orTrac-Lok Differential
Refer toPar.B-53.
B-73. PARTS REQUIRING NO LUBRICATION
B-74. WaterPumpBearing, Clutch Release
Bearing
The waterpumpandclutchreleasebearingsare
prelubricated forlifewhenmanufacturedand
cannotberelubricated.
B-7S. Starter Motor Bearings
The startingmotorbearingsarelubricatedat
assemblytolast between normalrebuildperiods.
B-76. AlternatorBearings
The alternatorbearingsarelubricatedatassembly
and requirenofurtherlubrication.
B-77. Springs
The vehiclespringsshouldnotbelubricated.At
assemblytheleavesarecoatedwitha long-lasting
special lubricantwhichisdesignedtolastthelife
ofthesprings.Sprayingwiththeusualmixtureof
oil andkerosenehasa tendencytowashthis lubri-
cant from between theleaves,makingitnecessary
torelubricate often toeliminatesqueaking.
B-78. ShockAbsorbers
Hydraulic direct-actionshockabsorbersareper-
manentlysealedandrequirenoperiodic lubrica-
tionservice.Shockabsorbermountingbushings
are nottobelubricated.
B-79. LUBRICATION REQUIREMENTS
FOR OFF-HIGHWAY OPERATION
Adequatelubrication becomes increasinglyim-
portantwhenvehiclesareusedinoff-highway
operation.Under these conditionsalloperating
parts ofboththe engine andchassisaresubjected
tounusualpressures.Atthesametimesuch
operationisusuallyunderabnormaldustand dirt
conditionsmakingadditionalprecautionsneces-
sary. Theimportanceofcorrectlubricationfor
theconditionsofoperationcannotbeoverestimated.
B-80. Engine Oil
It isimportant,thattheoilina neworrebuilt
engine bechangedafterthefirst eight ortenhours
ofoperation,andforheavy,dustywork,every50
hours thereafter.Watchtheconditionoftheoil
closelyandchangeitimmediatelyifitappearsto
becontaminated.
i-Il. Engine Oil Filter
Replace theoilfilterattheendofthefirst100
hours ofservice.Underextremeoperatingcon-
ditions,morefrequentreplacementmaybere-
quired. Theconditionoftheoilisa reliable
indicator oftheconditionofthefilterelement.
If theoil becomes discoloredandshowsevidence
ofcontamination,changethefilterwithoutdelay.
(Refer to Par. B-10,B-llforthecorrectprocedure
forreplacingtheoilfilter.)
B-82. AirCleaner
Care oftheaircleanerisextremelyvitaltothe
lifeoftheengine.Payparticularattentiontothe
amountofdustand dirt intheairtakenintothe
engine throughtheaircleaner.Whendustisnot
noticeableintheair,servicetheaircleanereach
scheduledmaintenanceperiod.Whenevertheairis
noticeably dusty(forexamplewhenthevehicleis
driven onsecondaryroadsorthroughfields)then
servicetheaircleanermorefrequently.Under
extremecontinuallydustyanddirtyconditions
wherethevehicleoperatesincloudsofdustand
dirt, servicetheaircleanerdaily.(RefertoPar.
B-24 thru B-26forserviceprocedures.)
B-83. Chassis Lubrication
The periodoflubricationdependsentirelyupon
thetypeofworkbeingdone.Usingthespecified
interval givenintheServiceMaintenanceSchedule
asa guide,lubricateatsafeintervalsrequiredfor
theparticulartypeofoperation.Underextremely
dustyconditionslubricate these pointsdaily.Be
sure toforceenoughlubricantintoeachfitting
toforceouttheoldlubricantwhichmightbecon-
taminatedwithgritandwhichwouldcause rapid
wear ifallowedtoremain.
Donotplacelubricantonthevarious ball and
socketjointsorpivotpointsoftheliftlinkage
as dirt will accumulatetoformanabrasivemix-
ture. Itis best tosimplywipe these partsclean
with a cloth.
B-84. Front Axle ShaftUniversalJoints
For off-highwayuseremovetheuniversaljoints
twiceyearly,thoroughlycleanboththehousings
and jointswitha suitablesolvent,and refill the
housingstothe fill plugopeninglevelswiththe
correct lubricantasgiveninthe Lubrication
Specifications.
B-85. TransmissionandTransfer Case
The combinedcapacityofthetwohousingsis
small foreconomy,makingitimportantthatthe
lubricant bechangedatregularintervals.For
off-highwayuse drain bothhousingsevery300
hours ofoperationand refill tothe fill plugopening
levels.RefertoB-35throughB-37whenchanging
lubricant.
B-86. Frontand Rear Axle Differentials
Becauseofthehigherpressuredevelopedinthe
axleassemblieswithheavydutyoperation, drain,
flush, and refill thedifferentialassemblieseach
300hoursofoperation.Useonlyflushingoilor
light engine oiltocleanoutthehousings(except
Powr-Lok and Trac-Lok differentials).Referto
Par. B-52andB-53fordrainingandflushing
differential.
18

Jeep* UNIVERSALSERIESSERVICE MANUAL
c
TUNE-UP
Contents
SUBJECT PAR.
GENERAL C-l
TUNE-UP .C-2
Air Cleaner C-21
Battery . C-3
Carburetor Adjustments C-25
Coil C-20
Crankcase VentilationC-6
Cylinder CompressionC-9
Cylinder Head(s).C-5
Dash PotAdjustments.C-26
Distributor ServiceC-10 thru C-13
Distributor ResistanceTestC-l6
Fan Belt C-27
Fuel Lines andScreens C-2 2
C-l. GENERAL
An enginetune-upshouldbeperformedforall
JeepVehicleseach6000miles[9.600km.]or
attheendofeach250hoursoff-the-roadoperation,
toensurebestpossibleperformanceatalltimes.
The tune-upshouldfollowthesequencegivenin
thissection.
Becauseoffederallawslimitingexhaustemissions,
it isevenmoreimportantthattheenginetune-up
is done accurately,usingthespecificationslisted
onthetune-upstickerfoundineachenginecom-
partment.
Note; Toensureproperoperationandeffectiveness
oftheexhaustemissioncontrolsystem,andto
complywith Federal andStaterequirements,a
recheck ofignitiontiming,idlespeedandidlemix-
ture andnecessaryadjustmentsmustbeperformed
afterthefirst 2,000 miles[3.200km.]ofvehicle
operation.
A minorenginetune-upshouldbeperformedevery
6,000 miles[9.600km.]orattheendof250hours
ofoff-the-roaduse. Major enginetune-upshould
beperformedevery12,000miles[19.300km.].
The partsofunitswhichaffectpowerandperform-
ancemaybedividedintothreegroups:
(1)Unitsaffectingcompression
(2)Unitsaffectingignition
(3)Unitsaffectingcarburetion
The tune-upprocedureshouldcover these groups
in theordergiven.Whiletheitemsaffectingcom-
pressionandignitionmaybehandledaccording
topersonalpreference,correctionofitemsinthe
carburetion groupshouldnotbeattempteduntil
all itemsaffectingcompressionandignitionhave
beensatisfactorilycorrected.
Note: Tomakesurehydro-carbonandcarbon
monoxideemissions will bewithinlimits,itisvery
impotrant thattheadjustmentsbefollowedexactly
aslistedonthestickerfoundineachengine
compartment.
SUBJECT PAR.
Fuel Pump. . C-23
Heat Control ValveC-7
Ignition CablesC-19
Ignition Timing . C-14
Ignition WiresC-l8
Manifold C-5
Manifold VacuumC-24
Point DwellC-17
Primary Circuit Tests ................. C-15
Spark PlugsC-4
Tappets C-8
ROADTESTC-2 8
SERVICE DIAGNOSIS . : C-29
TUNE-UPSPECIFICATIONS.. C-30
Minor enginetune-upconsistsofthefollowing.
Inspect andcorrectasrequired:
Battery cablesandconnections.
Alternator andregulatorwiring.
Primary — Secondarywiring,distributorcap.
Cylinder headtorque.
Contact pointdwell.
Vacuum andcentrifugaladvance.
Ignition timing.
Spark plugsforcorrectairgap.
Adjust idlespeedandidleairmixture.
Adjust alldrivebelttensions.
Clean carburetoraircleaner.
Lubricate exhaustmanifolddamper.
Major enginetune-upincludesthefollowing.
Inspect andcorrectasrequired:
Battery conditionandcharging circuit. Clean,
lubricate andtightenbatterycableconnec-
tions.
Ingition system.
Spark plugs;replaceifnecessaryorcleanand
gap.
Compression check.
Primary—Secondary wiring,distributorcap.
Replace contactpointsandcondenser.
Lubricate distributorcamwithcamgrease.
Adjust contactpoints.
Check vacuumandcentrifugaladvance.
Setignitiontiming.
Torque cylinderhead.
Adjust idlespeedandidleairmixture.
Replace fuelfilterelement
(every12,000miles[19.300 km.]).
Adjust alldrivebelttensions.
IMPORTANT:SPECIFICATIONS FOREN-
GINE RPM. DISTRIBUTORPOINTDWELL,
ANDIGNITIONTIMINGGIVEN IN TUNE-
UPSECTION C REFER TO VEHICLES WITH
ANDWITHOUTEXHAUSTEMISSIONCON-
TROL SYSTEMS.
FOR VEHICLES EQUIPPEDWITHEXHAUST
EMISSIONCONTROLSYSTEMSALSO
REFER TO SECTION Fl(F4-134 ENGINE)
AND F2(V6-225 ENGINE).
19

c
TUNE-UP
C-2. TUNE-UPSEQUENCE
The following Pars. C-3through C-2 7 givethe
sequenceanddescribetheservicestobeperformed
whentuningtheengine.
C-3. Clean and Check Battery
Inspect batteryandcables.Ifthebatteryisnot
satisfactory,installa fully-chargedbatterytoallow
completionofthetune-up.
Note:Ifthebatteryfailsanyofthefollowingtests,
rememberthatthecausemaybeotherelectrical
trouble,andnotnecessarilyonlya defectivebattery.
Refer toSectionH forelectricaltroubleshooting
and tests.
a. Check thespecificgravityoftheeletrolytein
eachcellofthebattery.A hydrometerreadingof
1.260indicatesthatthebatteryisfullycharged.
If thereadingis1.225orbelow,thebattery needs
recharging. Ifoneormorecellsis25"points"(.025)
or morelowerthantheothercells,thisindicates
thatthecellisshorted,thecellisaboutto fail, or
thereisa crack inthebatterypartitioninthecase.
Unlessthebatteryisrepairedorreplaced,battery
trouble will soonbeexperienced.
b. Check theelectrolytelevelineachcell,add
distilled watertomaintainthesolution%"[9.5
mm.]abovetheplates.Avoidoverfilling.Replace
thefillercapsandtightensecurely.Itisimportant
tokeeptheelectrolytelevelabovetheplatesat
all timesbecauseplatesthatareexposedforany
lengthoftime will beseriouslydamaged.
c. Check thewingnutsonthehold-downframe
fortightness.Tightenthemonlywithfingerpres-
sure, neverwithpliersora wrench.Excessivepres-
sure coulddamagethebatterycase.
d. Clean thebatteryterminalsandcableconnec-
FIG. C-l—FRAME GROUND STRAP —
HURRICANE F4
1— Right Front EngineMount
2— Frame Ground Strap
DAUNTLESS V-6
tors. Preparea strongsolutionofbakingsodaand
water andbrushitaroundtheterminalstoremove
any corrosionthatispresent.Thecellcapsmust
betightandtheirventssealedtopreventcleaning
solutionenteringthecells.Aftercleaninginstall
cableconnectorsonterminalsandcoattheter-
minals andconnectorswithheavygrease.
e.Inspectthebatterycablesandreplaceifbadly
corroded orfrayed. Check tightnessofterminal
screwstoensure good electricalconnections. Check
thetightnessofthenegativegroundcableconnec-
tionattheenginetoensurea good groundcon-
nection.
f. Load test thebattery.Connecta voltmeteracross
thebattery.Runthestartingmotorfor15seconds.
If thevoltage does notdropbelow10voltsona
12voltbatterythebatteryissatisfactory.Ifthe
voltagefallsbelow these values,yetthespecific
gravity isabove 1.225, theconditionofthebattery
isquestionable.
g. Makesuretheenginetoframegroundstrapor
cableconnectionsaretight.If these connections
are loose, corrodedordirty, hard startingorfailure
ofthevehicleelectricalsystemmayresult.Refer
to Fig. C-l forlocationofthe Hurricane F4engine
toframegroundstrapanditsconnections.Refer
toFig.C-2forlocationoftheDauntlessV-6en-
ginetoframegroundcable.
C-4. Cleanand Adjust SparkPlugs
Clean, inspect,andgap spark plugs.Donotinstall
spark plugsuntilcompletionofcompressiontests.
a. Usea Spark Cable andInstalling Plier Tool,
W-2 74, toremovetheleadsfromthe spark plugs.
Caution: Pullingonthecablestoremovethem
from the spark plugscancauseinternalbreaksin
theleadsthat will causeignitionfailure.
b. Usinga spark plugwrench,looseneach spark
plugoneortwoturnstobreak loose anycarbon
depositsontheplugbase.
20