1998 ISUZU TROOPER power steering

AIR CONDITIONING 1B Ð 29
3. Drive Belt
1) Temporary tighten the power steering pump unit
fixing bolts.
2) Push the drive belt when the force of 98N {10kgf}.,
and adjust the drive belt tension by tightening
drive belt tension adjustment bolt, till the 14 ~17
mm (0.55 ~0.67 in) of deflection of the belt is
obtained. Then tighten the power steering pump
fixing bolts.
2. Magnetic Clutch Harness Connector
1. Air Duct (Turbo to air cleaner)
Power steering
pump pulley
Tension adjustment
bolt
Crank pulley Drive beltCompressor98N{10kgf}
14™17mm
(0.55™
0.67 in.)
850RY00002

AIR CONDITIONING 1B Ð 31
REMOVAL
Preparation:
·Battery ground cable
·Discharge and recover refrigerant (Refer to
ÒREFRIGERANT RECOVERYÓ in this section)
1. Air Duct (Turbo to air cleaner)
Cover up the air duct connecting portion to prevent
foreign materials from getting into the turbo and the
air cleaner.
2. Magnetic Clutch Harness Connector
3. Drive Belt
Loosen the power steering pump unit fixing bolts,
then loosen the drive belt adjustment bolt and
remove the drive belt.
4. Refrigerant Line Connector
5. Compressor
CompressorTension adjustment bolt
Tension pally
14~17mm
(0.55-0.67in)
98N{10kgf}
Crank shaft pully
INSTALLATION
5. Compressor
Tighten the compressor fixing bolts to the specified
torque.
Compressor Bolt Torque Nám (kgám / lbáft)
40 (4.1 / 30)
4. Refrigerant Line Connector
·O-rings cannot be reused. Always replace with new
ones.
·Be sure to apply new compressor oil to the O-rings
when connecting refrigerant lines.
·Tighten the refrigerant line connector to the
specified torque.
Refrigerant Line Bolt Torque Nám (kgám / lbáft)
27 (2.8 / 20)
850RY00003

1B Ð 32 AIR CONDITIONING
3. Drive Belt
1) Temporary tighten the power steering pump unit
fixing bolts.
2) Push the drive belt when the force of 98N {10kgf}.,
and adjust the drive belt tension by tightening
drive belt tension adjustment bolt, till the 14 ~17
mm (0.55 ~0.67 in) of deflection of the belt is
obtained. Then tighten the power steering pump
fixing bolts.
2. Magnetic Clutch Harness Connector
1. Air Duct (Turbo to air cleaner)
CompressorTension adjustment bolt
Tension pally
14~17mm
(0.55-0.67in)
98N{10kgf}
Crank shaft pully
850RY00003

SERVICE INFORMATION 00 – 3
TROUBLESHOOTING
CONTENTS
PAGE
General Information ........................................................................................................ 00 – 4
General Troubleshooting ................................................................................................ 00 – 4
Power Steering System .................................................................................................. 00 – 7
Power Steering Pump ..................................................................................................... 00 – 8
Steering Column .............................................................................................................. 00 – 9

SERVICE INFORMATION 00 – 5
Problem Possible Cause Correction
GENERAL TROUBLESHOOTING (CONT.)
Wheel Tramp or Hop
Hard Steering
Too Much Play In
Steering
Poor Steering Wheel
Returnability
Abnormal Noise1. Blister or bump on tire.
2. Improper shock absorber operation
1. Bind in steering linkage ball studs,
upper or lower end ball joint.
2. Improper wheel alignment.
3. Steering gear misadjustment.
4. Tire not adequately inflated.
5. Bind in steering column or shaft.
6. Improper power steering system
operation.
1. Wheel bearings worn.
2. Loose steering gear or linkage.
3. Steering gear misadjustment.
4. Worn or loose steering shaft universal
joint.
5. Worn steering linkage ball joints.
6. Worn upper or lower end ball joints.
1. Bind in steering linkage ball joints.
2. Bind in upper or lower end ball joints.
3. Bind in steering column and shaft.
4. Bind in steering gear.
5. Improper wheel alignment.
6. Tires not adequately inflated.
7. Loose steering wheel nut.
8. Worn wheel bearing.
1. Worn, sticky or loose upper or lower
end ball joint, steering linkage ball
joints or drive axle joints.
2. Faulty shock absorbers.
3. Worn upper or lower control arm bushing.
4. Loose stabilizer bar.
5. Loose wheel nuts.
6. Loose suspension bolts or nuts.
7. Broken or otherwise damaged wheel
bearings.
8. Broken suspension springs.
9. Loose steering gear.
10. Faulty steering gear.Replace tire.
Replace shock absorber.
Replace ball joints.
Check wheel alignment.
Check and adjust steering gear
preload.
Inflate tires to proper pressure.
Repair or replace.
Repair or replace.
Refer to "Power steering
system troubleshooting."
Replace wheel bearings.
Retighten or repair.
Inspect and adjust steering
gear preload.
Retighten or replace steering
shaft.
Replace ball joints.
Replace ball joints.
Replace ball joints.
Replace ball joints.
Repair or replace.
Check and repair steering gear.
Adjust wheel alignment.
Adjust tire pressure.
Retighten.
Replace.
Replace.
Replace or repair.
Replace.
Retighten bolts.
Tighten nuts. Check for
elongated wheel nut holes.
Replace wheel if required.
Retighten suspension bolts or
nuts.
Replace wheel bearing.
Replace spring.
Retighten mounting bolt.
Check and adjust steering gear.

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.

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 loss of fluid due to internal pump leakage. Check for leak and correct. Bleed the system.
Extremely cold temperatures will cause air bubbles in the system if the fluid level is low. If the fluid level is
correct and pump still foams, remove pump from vehicle and check housing for cracks. If housing is
cracked, replace pump housing.
Low Pressure Due to
Steering Pump
Low Pressure Due to
Steering Gear
Growling Noise in
Steering Pump
Groaning Noise in
Steering Pump
Rattling Noise in
Steering Pump
Swishing Noise in
Steering Pump
Whining Noise in
Steering Pump1. Relief valve sticking or inoperative.
2. Side plate not flat against cam ring.
3. Extreme wear of cam ring.
4. Scored side plate or rotor.
5. Vanes sticking in rotor slots.
6. Cracked or broken side plate.
7. High internal leakage.
1. Scored housing bore.
2. Damaged O-ring or seal ring in the ball
nut.
1. Excessive back pressure in hoses or
steering unit caused by restriction.
2. Scored side plate or rotor.
3. Worn cam ring.
1. Air in the fluid.
2. Low fluid level.
3. Pump mounting loose.
1. Vanes sticking in rotor slots.
2. Vane improperly installed.
1. Damaged relief valve.
1. Scored side plate and vanes.
2. Damaged relief valve.Replace relief valve.
Replace side plate.
Replace cam ring.
Replace side plate or rotor.
Repair or replace vanes and
rotor.
Replace side plate.
Repair internal leakage.
Replace housing.
Replace O-ring or seal ring.
Repair steering unit or pump.
Replace side plate or rotor.
Replace cam ring.
Bleed hydraulic system.
Replenish fluid.
Tighten mounting bolt.
Repair or replace vanes and
rotor.
Repair rotor and vane.
Replace relief valve.
Replace side plate and vanes.
Replace relief valve.

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. steering angle (inside) 34°+0°
(outside) 32°
+0°
–2°
POWER STEERING
Steering gear
Type Integral, ball screw
Gear ratio 16.3 : 1
Oil pump
Type Vane
Operating fluid ATF DEXRON
®- ˜E or™