1998 ISUZU TROOPER Service Repair Manual

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Page 289 of 3573

ISUZU TROOPER 1998 Service Repair Manual SERVICE INFORMATION 00 – 7
Problem Possible Cause Correction
POWER STEERING SYSTEM
HISSING NOISE
There is some noise in all power steering systems. One of the most common is a hissing sound when th

SERVICE INFORMATION 00 – 7
Problem Possible Cause Correction
POWER STEERING SYSTEM
HISSING NOISE
There is some noise in all power steering systems. One of the most common is a hissing sound when the
steering wheel is fully turned and the car is not moving. This noise will be most evident when the wheel is
operated while the brakes are applied. There is no relationship between this noise and steering
performance. Do not replace the valve unless the "hissing" noise is extremely objectionable. A replacement
valve will also have a slight noise, and is not always a cure for the condition.
Rattle or Chucking Noise
Poor Return of Steering
Wheel to Center
Momentary Increase in
Effort When Turning
Wheel Fast to Right or
Left
Steering Wheel Surges or
Jerks When Turning
Especially During Parking
Excessive Wheel Kick
Back or Loose Steering
Hard Steering or Lack of
Power Assist1. Pressure hose touching other parts of
vehicle.
2. Tie rod ends loose.
3. Loose steering gear mounting.
4. Steering gear misadjustment.
1. Improper front wheel alignment.
2. Wheel bearing worn.
3. Tie rod end binding.
4. Ball joint binding.
5. Tight or frozen steering shaft bearing.
6. Steering gear misadjustment.
7. Sticky or plugged steering gear valve.
8. Entry of air in the power steering
system.
1. High internal leakage.
2. Power steering fluid level low.
1. Insufficient pump pressure.
2. Sticky steering gear valve.
3. Power steering fluid level low.
1. Air in system.
2. Tie rod end loose.
3. Wheel bearing worn.
1. Sticky steering gear valve.
2. Insufficient pump pressure.
3. Excessive internal pump leakage.
4. Excessive internal steering gear
leakage.
5. Power steering fluid level low.Adjust hose position. Do not
bend tubing by hand.
Tighten or replace tie rod end.
Tighten steering gear
mounting.
Check and adjust steering gear
preload.
Adjust front wheel alignment.
Replace front wheel bearing.
Replace tie rod end.
Replace ball joint.
Replace steering assembly.
Adjust the steering gear.
Repair or replace steering gear
valve.
Bleed the system.
Repair steering gear.
Replenish fluid.
Repair pump assembly.
Repair or replace steering gear.
Replenish fluid.
Bleed hydraulic system.
Tighten tie rod end.
Replace wheel bearing.
Repair or replace steering gear
valve.
Repair pump assembly.
Repair pump assembly.
Repair steering gear.
Replenish fluid.

Page 290 of 3573

ISUZU TROOPER 1998 Service Repair Manual 00 – 8 SERVICE INFORMATION
Problem Possible Cause Correction
POWER STEERING PUMP
Foaming milky power steering fluid, low fluid level, and possible low pressure can be caused by air in the
fluid, or

Page 291 of 3573

ISUZU TROOPER 1998 Service Repair Manual SERVICE INFORMATION 00 – 9
Problem Possible Cause Correction
STEERING COLUMN
LOCK SYSTEM
Will Not Unlock
Will Not Lock
Key Cannot Be Removed
in “OFF-LOCK”1. Damaged lock cylinder.
2. Damaged se

Page 292 of 3573

ISUZU TROOPER 1998 Service Repair Manual 00 – 10 SERVICE INFORMATION
Problem Possible Cause Correction
STEERING COLUMN (CONT.)
TURN SIGNAL SWITCH
This troubleshooting covers mechanical problems only. See Section 8 for turn signal switch el

Page 293 of 3573

ISUZU TROOPER 1998 Service Repair Manual SERVICE INFORMATION 00 – 11
MAIN DATA AND SPECIFICATIONS
FRONT END ALIGNMENT
Caster 2° 10 ± 45
Camber 0° ± 30
King pin inclination 12° 30 ± 30
Toe-in mm (in) 0 ± 2 (0 ± 0.08)
Max. stee

Page 294 of 3573

ISUZU TROOPER 1998 Service Repair Manual 00 – 12 SERVICE INFORMATION
Items Service Standard Service Limit
SERVICE STANDARD
POWER STEERING GEAR
Sector shaft outside diameter mm (in)
POWER STEERING PUMP
Fluid pressure
(When the engine is nor

Page 295 of 3573

ISUZU TROOPER 1998 Service Repair Manual SERVICE INFORMATION 00 – 13
STEERING
INSPECTION
Visual check
Check the following parts:
• Oil leakage.
• Steering system for looseness or damage.
• Steering function
• Joint ball for oil le

Page 296 of 3573

ISUZU TROOPER 1998 Service Repair Manual 00 – 14 SERVICE INFORMATION
STEERING WHEEL FREE PLAY
ADJUSTMENT
INSPECTION
1. Check the amount of steering wheel play by turning
the wheel in both directions until the tires begin to
move with the f

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