Jeep XJ. Manual — part 357
SPECIFICATIONS
GLOW PLUG CURRENT DRAW
Initial
Current
Draw:
Approximately
22–25
amps per plug.
After 20 seconds of operation: Approximately
9–12 amps per plug.
TORQUE CHART—2.5L DIESEL
DESCRIPTION
TORQUE
Accelerator Pedal Bracket Mounting Nuts . . 5 N·m
(46 in. lbs.)
Banjo-Type Fittings . . . . . . . . . . 19 N·m (14 ft. lbs.)
Engine Coolant Temperature Sensor . . . . . . 18 N·m
(13 ft. lbs.)
Engine Speed Sensor Bolts . . . . 19 N·m (14 ft. lbs.)
Fuel Hose (Tube) Clamps For Rubber Hose . . . 2 N·m
(20 in. lbs.)
Fuel Injector . . . . . . . . . . . . . . . 70 N·m (52 ft. lbs.)
Fuel Injector Line At Injector . . 30 N·m (22 ft. lbs.)
Fuel Injector Line At Injector Pump . . . . . . 30 N·m
(22 ft. lbs.)
Fuel Injection Pump Mounting Nuts . . . . . . 30 N·m
(22 ft. lbs.)
Fuel Injection Pump Drive Gear . . . . . . . . . 88 N·m
(65 ft. lbs.)
Fuel Line Clamp Bracket Bolts . 24 N·m (18 ft. lbs.)
Fuel Tank Nuts . . . . . . . . . . . . 11 N·m (100 in. lbs.)
Glow Plugs . . . . . . . . . . . . . . . 23 N·m (203 in. lbs.)
Powertrain Control Module Mounting Bolts . . 1 N·m
(9 in. lbs.)
Throttle Position Sensor Mounting Bolts . . . 7 N·m
(60 in. lbs.)
Vehicle Speed Sensor Mounting Bolts . . . . . . 3 N·m
(26 in. lbs.)
14 - 38
FUEL SYSTEM—2.5L DIESEL ENGINE
XJ
2000 JEEP CHEROKEE
STEERING
TABLE OF CONTENTS
page
page
POWER STEERING . . . . . . . . . . . . . . . . . . . . . . . . . 1
POWER STEERING PUMP . . . . . . . . . . . . . . . . . . . 5
POWER STEERING GEAR . . . . . . . . . . . . . . . . . . . 11
STEERING LINKAGE . . . . . . . . . . . . . . . . . . . . . . . 22
STEERING COLUMN . . . . . . . . . . . . . . . . . . . . . . . 26
POWER STEERING
TABLE OF CONTENTS
page
page
DESCRIPTION AND OPERATION
STEERING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING
POWER STEERING SYSTEM DIAGNOSIS
CHARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
DESCRIPTION AND OPERATION
STEERING SYSTEM
DESCRIPTION
The power steering system has a hydraulic pump.
The pump is a constant flow rate and displacement,
vane-type pump. The pump on the 4.0L engine has a
reservoir mounted to it (Fig. 1). The 2.5L engine has
a remote mounted reservoir.
The steering gear (Fig. 1) used is a recirculating
ball type gear with 14:1 gear ratio. A tilt and non-tilt
column provide steering input.
NOTE: Right hand drive (RHD) and left hand drive
(LHD) service procedures and torque specifications
for steering linkage, gear and column are the same.
The power steering pump procedures are different.
Refer to appropriate service procedures regarding
each component in the system.
OPERATION
The steering gear acts as a rolling thread between
the worm shaft and the rack piston. Power assist is
provided by the hydraulic pump. When the steering
wheel is turned the worm shaft turns which moves
the rack piston. The rack piston movement turns the
pitman shaft which is connected to the steering link-
age by the pitman arm.
Fig. 1 Power Steering Gear & Pump - 4.0L
1 – 4.0 L PUMP
2 – RETURN HOSE
3 – STEERING GEAR
4 – PRESSURE HOSE
5 – RESERVOIR
XJ
STEERING
19 - 1
DIAGNOSIS AND TESTING
POWER STEERING SYSTEM DIAGNOSIS CHARTS
STEERING NOISE
There is some noise in all power steering systems. One of the most common is a hissing sound evident at a
standstill parking. Or when the steering wheel is at the end of it’s travel. Hiss is a high frequency noise similar
to that of a water tap being closed slowly. The noise is present in all valves that have a high velocity fluid passing
through an orifice. There is no relationship between this noise and steering performance.
CONDITION
POSSIBLE CAUSES
CORRECTION
OBJECTIONAL HISS OR
WHISTLE
1. Steering intermediate shaft to dash panel
seal.
1. Check and repair seal at dash
panel.
2. Noisy valve in power steering gear.
2. Replace steering gear.
RATTLE OR CLUNK
1. Gear mounting bolts loose.
1. Tighten bolts to specification.
2. Loose or damaged suspension
components/track bar.
2. Inspect and repair suspension.
3. Loose or damaged steering linkage.
3. Inspect and repair steering
linkage.
4. Internal gear noise.
4. Replace gear.
5. Pressure hose in contact with other
components.
5. Reposition hose.
CHIRP OR SQUEAL
1. Loose belt.
1. Adjust or replace.
WHINE OR GROWL
1. Low fluid level.
1. Fill to proper level.
2. Pressure hose in contact with other
components.
2. Reposition hose.
3. Internal pump noise.
3. Replace pump.
4. Air in the system.
4. Perform pump initial operation.
SUCKING AIR SOUND
1. Loose return line clamp.
1. Replace clamp.
2. O-ring missing or damaged on hose
fitting.
2. Replace o-ring.
3. Low fluid level.
3. Fill to proper level.
4. Air leak between pump and reservoir.
4. Repair as necessary.
SCRUBBING OR
KNOCKING
1. Wrong tire size.
1. Verify tire size.
2. Wrong gear.
2. Verify gear.
19 - 2
STEERING
XJ
BINDING AND STICKING
CONDITION
POSSIBLE CAUSE
CORRECTION
DIFFICULT TO TURN WHEEL
STICKS OR BINDS
1. Low fluid level.
1. Fill to proper level.
2. Tire pressure.
2. Adjust tire pressure.
3. Steering component.
3. Inspect and lube.
4. Loose belt.
4. Adjust or replace.
5. Low pump pressure.
5. Pressure test and replace if
necessary.
6. Column shaft coupler binding.
6. Replace coupler.
7. Steering gear worn or out of
adjustment.
7. Repair or replace gear.
8. Ball joints binding.
8. Inspect and repair as necessary.
INSUFFICIENT ASSIST OR POOR RETURN TO CENTER
CONDITION
POSSIBLE CAUSE
CORRECTION
HARD TURNING OR MOMENTARY
INCREASE IN TURNING EFFORT
1. Tire pressure.
1. Adjust tire pressure.
2. Low fluid level.
2. Fill to proper level.
3. Loose belt.
3. Adjust or replace.
4. Lack of lubrication.
4. Inspect and lubricate steering and
suspension compnents.
5. Low pump pressure.
5. Pressure test and repair as
necessary.
6. Internal gear leak.
6. Pressure and flow test, and repair
as necessary.
STEERING WHEEL
DOES NOT WANT TO RETURN TO
CENTER POSITION
1. Tire pressure.
1. Adjust tire pressure.
2. Wheel alignment.
2. Align front end.
3. Lack of lubrication.
3. Inspect and lubricate steering and
suspension compnents.
4. High friction in steering gear.
4. Test and adjust as necessary.
5. Ball joints binding.
5. Inspect and repair as necessary.
Some roads will cause a vehicle to drift, due to the
crown in the road.
XJ
STEERING
19 - 3
DIAGNOSIS AND TESTING (Continued)
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