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LUBRICATION AND MAINTENANCE
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LUBRICATION AND MAINTENANCE
CONTENTS
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CHASSIS AND BODY COMPONENTS . . . . . . . 30
DRIVETRAIN . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
ENGINE MAINTENANCE . . . . . . . . . . . . . . . . . . 13
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 1
JUMP STARTING, HOISTING AND TOWING . . 7
MAINTENANCE SCHEDULES . . . . . . . . . . . . . . . 5
GENERAL INFORMATION
INDEX
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Classification of Lubricants . . . . . . .
Components Requiring No Lubrication
Fluid Capacities
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Fuel Requirements . . . . . . . . . . . . .
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Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Recommended Lubricant and Replacement Parts . 3
Routine Service . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
cold-climate operation;
off-road driving; or
commercial service.
To service a Jeep vehicle for a severe driving con-
dition, change all the lubricating fluids and lubricate:
the body components,
all the driveline coupling joints, and
the steering linkage
more often than for a normal driving condition to
prevent excessive wear of the components.
DUSTY AREAS
Driving in an area with dust-filled air increases the
risk of particles entering the engine and crankcase.
With this type of severe driving condition, attention
should be given to the engine and crankcase compo-
nents.
OFF-ROAD (4WD) OPERATION
After completion of off-road (4WD) operation, the
underside of the vehicle should be thoroughly in-
spected. Examine threaded fasteners for looseness.
HARSH SURFACE ENVIRONMENTS
After vehicle operation in a harsh surface environ-
ment, the following components should be inspected
and cleaned as soon as possible:
brake drums,
brake linings,
front wheel bearings (2WD vehicles only), and
axle coupling joints.
This will prevent wear and/or unpredictable brake
action.
INTRODUCTION
Jeep lubrication and maintenance is divided into
required and recommended service tasks.
The recommendations and procedures listed in this
group are intended for Jeep Dealer Service Personnel.
Because conditions vary, it is necessary to schedule
service tasks according to a time interval as well as a
distance interval.
It is the owner’s responsibility to have vehicle ser-
viced. Owner is to pay for labor and necessary parts
that are not covered by the warranty.
Additional lubrication and maintenance informa-
tion is listed in the Owner’s Manual, which is in-
cluded with the vehicle.
SEVERE DRIVING CONDITIONS
When a vehicle is subjected to a severe driving con-
dition, time between recommended maintenance
should be decreased.
Refer to Engine Maintenance for the engine oil and
filter maintenance interval when involved with a se-
vere driving condition.
A severe driving condition is defined as either:
frequent short trip driving less than 24 km (15
miles);
frequent driving in a dusty environment;
trailer towing;
extensive engine idling;
sustained high-speed operation;
desert operation;
frequent starting and stopping;
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LUBRICATION AND MAINTENANCE
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ROUTINE SERVICE
The following routine vehicle service is highly rec-
ommended on a monthly basis.
TIRES—Inspect
the tires for unusual wear/damage
and determine if the inflation pressure is acceptable
for the vehicle load.
BATTERY—Inspect
and clean the terminals.
Tighten the terminals, if necessary.
FLUIDS—Determine
if the coolant, brake fluid,
power steering, automatic transmission, and clutch
fluid level are acceptable. Add fluid, if necessary.
LIGHTS/ELECTRICAL—Test
all the electrically
operated systems in the vehicle for proper operation.
It is also recommended that the engine oil level
and the windshield washer fluid level be deter-
mined (and corrected) during each fuel fill-up.
FUEL REQUIREMENTS
All Jeep engines require the use of unleaded gas-
oline. In addition, the fuel must have a minimum oc-
tane rating of 87.
CAUTION: UNLEADED FUEL ONLY must be used in
vehicles equipped with a catalyst emission control
system. All vehicles have reminders printed on the
instrument panel (Fig. 1) and on the fuel filler door
(Fig. 2). Vehicles also have fuel filler tubes that are
designed to accept only the small-diameter un-
leaded gasoline nozzles. It is illegal to defeat the
design of an unleaded fuel filler tube.
Fig. 2 Unleaded Fuel Only Reminder—Fuel Filler
Door
American Petroleum Institute (API), and
National Lubricating Grease Institute (NLGI).
ENGINE OIL
SAE VISCOSITY GRADE
An SAE viscosity grade is used to specify viscosity
of engine oil. SAE 30 specifies a single viscosity en-
gine oil. Engine oils also have multiple viscosities
(Fig. 3).
CLASSIFICATION OF LUBRICANTS
Lubricating fluids and chassis component lubri-
cants are classified and graded according to stan-
dards recommended by the:
Society of Automotive Engineers (SAE),
Fig. 3 SAE Oil Viscosity Grade & API Service Grade
The viscosity grade of an oil is an indicator of its
thickness or flow capability. The lower the number,
the better the flow. The second viscosity grade num-
ber (without a W suffix) is the warm/hot-temperature
viscosity. The viscosity increases with engine temper-
ature. With a single viscosity grade, the oil viscosity
is valid only for one narrow temperature range.
Fig. 1 Unleaded Fuel Only Reminders—Fuel Gauge
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Above that temperature range the viscosity will de-
crease, and below that range the viscosity will in-
crease.
An engine oil with an SAE 5W-30 viscosity grade
provides good flow capability for fast cold weather
engine starts. The viscosity will then increase with
engine temperature to provide good high-tempera-
ture engine lubrication.
API SERVICE GRADE
The API Service Grade specifies the type of engine/
operating conditions for which the oil is intended.
The API Service Grade specifications also apply to
energy conserving engine oils (Fig. 3). The API cer-
tification mark is also used indicating that the oil is
certified to meet the most critical requirements es-
tablished by the manufacturer (Fig. 4).
LUBRICATION AND MAINTENANCE
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CHASSIS COMPONENT AND WHEEL BEARING
LUBRICANTS
The chassis component and wheel bearing lubri-
cants are identified by the NLGI Certification Sym-
bol (Fig. 5).
Fig. 5 NLGI Lubricant Certification/Identification
Symbol
The letter
G
indicates wheel bearing lubricant and
the letter
L
indicates chassis lubricant. When the
letters are combined the lubricant can be used for
dual applications. The suffix letters
C
and
B
indi-
cates quality level of the lubricant. Use only lubri-
cants that display the NLGI Certification Symbol.
Fig. 4 The API Engine Oil Certification Mark
For maximum protection, use API Service Grade
SG, SG/CD or SG/CE engine oil in Jeep engines.
RECOMMENDED LUBRICANT AND REPLACEMENT
PARTS
Jeep vehicles are engineered to provide many
years of dependable operation. When necessary,
MO-
PAR brand lubricants and genuine replacement
parts
are highly recommended.
GEAR LUBRICANTS
A dual SAE viscosity grade is also used to specify
the viscosity of multipurpose gear lubricants.
The API lubrication quality grade designation
identifies gear lubricants in terms of recommended
usage.
COMPONENTS REQUIRING NO LUBRICATION
There are many components that should not be lu-
bricated. The components that should
not
be lubri-
cated are:
air pumps;
generator bearings;
drive belts;
drive belt idler pulleys;
rubber bushings;
starter motor bearings;
suspension strut bearings;
throttle control cables;
throttle linkage ball joints; and
water pump bearings.
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LUBRICATION AND MAINTENANCE
FLUID CAPACITIES
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LUBRICATION AND MAINTENANCE
MAINTENANCE SCHEDULES
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INTRODUCTION
Chrysler Corporation has compiled recommended
lubrication and maintenance schedules and proce-
dures to help reduce premature wear or failure over
a broad range of operating conditions.
Check fluid level in battery.
Rotate Tires.
SEVERE SERVICE MAINTENANCE
If the vehicle is involved with a severe driving con-
dition, after each 4 800-km (3,000-miles)/3-month in-
terval. A severe driving condition includes:
frequent short trip driving less than 24 km (15
miles);
frequent driving in a dusty environment;
trailer towing;
extensive engine idling;
sustained high-speed operation;
desert operation;
frequent starting and stopping;
cold-climate operation;
off-road driving; or
commercial service.
22,500 MILES (36 000 KM) OR AT 18 MONTHS
Check engine coolant level, hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
Rotate Tires.
30,000 MILES (48 000 KM) OR AT 24 MONTHS
Replace air cleaner filter.
Replace spark plugs.
Adjust drive belt.
Check engine coolant level, hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
Check fluid level in battery.
Drain and refill automatic transmission.
Drain and refill transfer case.
Rotate Tires.
37,500 MILES (60 000 KM) OR AT 30 MONTHS
Check engine coolant level, hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
Drain and refill manual transmission.
Rotate Tires.
45,000 MILES (72 500 KM) OR AT 36 MONTHS
Check engine coolant level, hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
Check fluid level in battery.
Rotate Tires.
52,500 MILES (84 500 KM) OR AT 42 MONTHS
Flush and replace engine coolant.
Check engine coolant system hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
Rotate Tires.
MAINTENANCE SCHEDULES
AT EACH STOP FOR FUEL
Check engine oil level, add as required.
Check windshield washer solvent and add if required.
ONCE A MONTH
Check tire pressure and look for unusual wear or
damage.
Inspect battery and clean and tighten terminals as
required.
Check electrolyte level and add water as needed.
Check fluid levels of coolant reservoir, power steer-
ing and transmission and add as needed.
Check all lights and all other electrical items for
correct operation.
Check rubber seals on each side of the radiator for
proper fit.
7,500 MILES (12 000 KM) OR AT 6 MONTHS
Check engine coolant level, hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
Rotate Tires.
15,000 MILES (24 000 KM) OR AT 12 MONTHS
Check engine coolant level, hoses and clamps.
Change engine oil.
Replace engine oil filter.
Check exhaust system.
Lubricate steering linkage (4x4 models).
Lubricate propeller shaft universal joints.
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