ISUZU TROOPER 1998 Service Repair Manual

FRONT SUSPENSION 3C – 13
4. Lower Ball Joint
Tighten the nut to the specified torque, with just
enough additional torque to align cotter pin holes.
Install new cotter pin.
Lower Ball Joint Nut Torque N·m (kg·m/lb·ft)
147 (15.0 / 108)
3. Back Plate
2. Wheel Speed Sensor (if equipped with ABS)
Tighten the bolt to the specified torque.
Wheel Speed Sensor Bolt Torque N·m (kg·m/lb·in)
8 (0.8 / 69)
1. Torsion Bar
Refer to “Torsion Bar” in this section.
NOTE:
Adjust the trim height. Refer to “Front End
Alignment” in section 2A.

3C – 14 FRONT SUSPENSION
UPPER CONTROL ARM
Removal Steps
1. Speed sensor cable (if equipped with
ABS)
2. Nut and cotter pin
3. Upper ball joint
4. Bolt and plate
5. Nut assembly
6. Camber shims
7. Caster shims
8. Upper control arm assembly
9. Nut
10. Plate
11. Bushing
12. Fulcrum pin
Installation Steps
12. Fulcrum pin
11. Bushing
10. Plate
9. Nut
8. Upper control arm assembly
7. Caster shims
6. Camber shims
5. Nut assembly
4. Bolt and plate
3. Upper ball joint
2. Nut and cotter pin
1. Speed sensor cable (if equipped with
ABS)

FRONT SUSPENSION 3C – 15
REMOVAL
Preparation:
1) Raise the vehicle and support the frame with suitable
safety stands.
2) Remove wheel and tire assembly. Refer to “Wheels
and Tires” in section 3E.
3) Remove the brake caliper and disconnect flexible hose.
Refer to “Brakes” in section 5.
4) Support lower control arm with a jack.
1. Speed Sensor Cable (if equipped with ABS)
2. Nut and Cotter Pin
Remove the upper ball joint from the knuckle.
Remover: 5-8840-2121-0 (J-36831)
CAUTION:
Be careful not to break the ball joint boot.
3. Upper Ball Joint
4. Bolt and Plate
5. Nut Assembly
6. Camber Shims
Note the positions and number of shims.
7. Caster Shims
Note the positions and number of shims.
8. Upper Control Arm Assembly
9. Nut
10. Plate
11. Bushing
Remover: 5-8840-0256-0 (J-29755)
12. Fulcrum Pin

3C – 16 FRONT SUSPENSION
INSPECTION AND REPAIR
Make necessary parts replacement if wear, damage,
corrosion or any other abnormal conditions are found
through inspection.
Check the following parts:
•Upper control arm
•Bushing
•Fulcrum pin
INSTALLATION
12. Fulcrum Pin
11. Bushing
Installer: 5-8840-0256-0 (J-29755) and
5-8840-2307-0 (J-39376)
10. Plate
9. Nut
Tighten fulcrum pin nut finger-tight.
NOTE:
Torque fulcrum pin nut after adjusting buffer clearance.
Buffer Clearance (T) mm (in)
23 (0.91) Wide Tread
24 (0.94) Narrow Tread
Fulcrum Pin Nut Torque N·m (kg·m/lb·ft)
108 (11.0 / 80)

FRONT SUSPENSION 3C – 17
8. Upper Control Arm Assembly
Install upper control arm assembly with the fulcrum
pin projections turned inward.
7. Caster Shims
Install the caster shims between the chassis frame and
fulcrum pin.
6. Camber Shims
Install the camber shims between the chassis frame
and fulcrum pin.
5. Nut Assembly
4. Bolt and Plate
Fulcrum Pin Bolt Torque N·m (kg·m/lb·ft)
152 (15.2 / 112)
3. Upper Ball Joint
Upper Ball Joint Nut Torque N·m (kg·m/lb·ft)
57 (5.8 / 42)
2. Nut and Cotter Pin
Tighten the nut to the specified torque, with just
enough additional torque to align cotter pin holes.
Install new cotter pin.
Upper Ball Joint Nut Torque N·m (kg·m/lb·ft)
98 (10.0 / 72)
1. Speed Sensor Cable (if equipped with ABS)

3C – 18 FRONT SUSPENSION
LOWER CONTROL ARM
Removal Steps
1. Nut and washer, front
2. Nut and washer, rear
3. Torsion bar
4. Torsion bar arm
5. Stabilizer link
6. Shock absorber
7. Lower ball joint
8. Bolt, front
9. Bolt, rear
10. Lower control arm
11. Bolt, torsion bar arm
12. Bolt, lower ball joint
13. Bushing, front
14. Bushing, rear
Installation Steps
14. Bushing, rear
13. Bushing, front
12. Bolt, lower ball joint
11. Bolt, torsion bar arm
10. Lower control arm
9. Bolt, rear
8. Bolt, front
7. Lower ball joint
6. Shock absorber
5. Stabilizer link
4. Torsion bar arm
3. Torsion bar
2. Nut and washer, rear
1. Nut and washer, front

FRONT SUSPENSION 3C – 19
REMOVAL
Preparation:
1) Raise the vehicle and support the frame with suitable
safety stands.
2) Remove wheel and tire assembly. Refer to “Wheels
and Tires” in section 3E.
3) Remove the outer track rod from the knuckle. Refer to
“Steering Linkage” in section 2A.
4) Remove the retaining ring from the front axle driving
shaft to release the shaft from hub. Refer to “Front
Axle” in section 4C.
5) Support lower control arm with a jack.
1. Nut and Washer, Front
2. Nut and Washer, Rear
3. Torsion Bar
Refer to “Torsion Bar” in this section.
4. Torsion Bar Arm Bracket
5. Stabilizer Link
Disconnect the link at the lower control arm.
6. Shock Absorber
Remove the shock absorber lower end from the lower
control arm.
7. Lower Ball Joint
Remove the lower ball joint from the lower control
arm.
8. Bolt, Front
9. Bolt, Rear
10. Lower Control Arm
11. Bolt, Torsion Bar Arm
12. Bolt, Lower Ball Joint
13. Bushing, Front
Remover: 5-8840-2123-0 (J-36833)

3C – 20 FRONT SUSPENSION
14. Bushing, Rear
Remover: 5-8840-2124-0 (J-36834)
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts:
•Lower control arm
•Bushing
INSTALLATION
14. Bushing, Rear
Installer: 5-8840-2124-0 (J-36834)
13. Bushing, Front
Installer: 5-8840-2123-0 (J-36833)

FRONT SUSPENSION 3C – 21
12. Bolt, Lower Ball Joint
11. Bolt, Torsion Bar Arm
10. Lower Control Arm
9. Bolt, Rear
8. Bolt, Front
7. Lower Ball Joint
Lower Ball Joint Nut Torque N·m (kg·m/lb·ft)
103 (10.5 / 76)
6. Shock Absorber
Shock Absorber Nut Torque N·m (kg·m/lb·ft)
82 (8.4 / 61)
5. Stabilizer Link
Link Nut Torque N·m (kg·m/lb·ft)
50 (5.1 / 37)
4. Torsion Bar Arm Bracket
Torsion Bar Arm Bracket Nut Torque N·m (kg·m/lb·ft)
116 (11.8 / 85)
3. Torsion Bar
Refer to “Torsion Bar” in this section.
2. Nut and Washer, Rear
Tighten lower link nut finger-tight.
NOTE:
Torque lower control arm nut after adjusting buffer
clearance.
Buffer Clearance (T) mm (in)
23 (0.91) Wide Tread
24 (0.94) Narrow Tread
Lower Arm Rear Nut Torque N·m (kg·m/lb·ft)
196 (20.0 / 145)
1. Nut and Washer, Front
Tighten lower link nut finger-tight.
NOTE:
Torque lower control arm nut after adjusting buffer
clearance.
Buffer Clearance (T) mm (in)
23 (0.91) Wide Tread
24 (0.94) Narrow Tread
Lower Arm Front Nut Torque N·m (kg·m/lb·ft)
157 (16.0 / 116)
NOTE:
Adjust the trim height. Refer to “Front End Alignment” in
section 2A.

3C – 22 FRONT SUSPENSION
UPPER BALL JOINT
Removal Steps
1. Nut and cotter pin
2. Bolt, nut and washer
3. Upper ball joint
Installation Steps
3. Upper ball joint
2. Bolt, nut and washer
1. Nut and cotter pin
REMOVAL
Preparation:
1) Raise the vehicle and support the frame with suitable
safety stands.
2) Remove the speed sensor from the knuckle (If
equipped with ABS).