1998 ISUZU TROOPER suspension

POWER STEERING 2A – 11
•If the pressure recorded is lower than 9300
kPa (1350 psi) For 6VD1, 6VE1, and 9800 kPa
(100 kg/cm
2/ 1420 psi) For 4JG2, 4JX1, the
valve or the rotating group in the pump is
defective.
7. If the pump pressure are within specifications,
leave the valve open and turn (or have
someone else turn) the steering wheel fully in
both directions. Record the highest pressures
and compare with the maximum pump
pressure recorded in step 6. If this pressure cannot be built in either (or one) side of the
power steering gear, the power steering gear is
leaking internally and must be disassembled
and repaired.
8. Shut the engine off, remove the testing gage,
reconnect the pressure hose, check the fluid
level and make the needed repairs.
9. If the problem still exists, the steering and front
suspension must be thoroughly examined.

FRONT SUSPENSION 3C – 1
SECTION 3C
FRONT SUSPENSION
CONTENTS
PAGE
General Description ........................................................................................................ 3C – 2
On-Vehicle Service .......................................................................................................... 3C – 3
Shock Absorber ........................................................................................................... 3C – 3
Stabilizer Bar ............................................................................................................... 3C – 5
Torsion Bar .................................................................................................................. 3C – 7
Knuckle ........................................................................................................................ 3C – 10
Upper Control Arm ..................................................................................................... 3C – 14
Lower Control Arm ..................................................................................................... 3C – 18
Upper Ball Joint .......................................................................................................... 3C – 22
Lower Ball Joint .......................................................................................................... 3C – 25

3C – 2 FRONT SUSPENSION
GENERAL DESCRIPTION
The front suspension is designed to allow each
wheel to compensate for changes in the road
surface level without greatly affecting the opposite
wheel. Each wheel is independently connected to
the frame by a steering knuckle, ball joint
assemblies, and upper and lower control arms.
The front wheels are held in proper relationship to
each other by two outer track rods which are
connected to steering arms on the knuckles and to
a center track rod.
All models have a front suspension system
consisting of control arms, stabilizer bar, shock
absorber and a torsion bar. The front end of the
torsion bar is attached to the lower control arm.
The rear of the torsion bar is mounted into a height
control arm at the crossmember. Vehicle trim
height is controlled by adjusting this arm.
Shock absorbers are mounted between the
brackets on the frame and the lower control arms.The lower portion of each shock absorber is
attached to the lower control arm by a bolt and nut.
The upper portion of each shock absorber extends
through a frame bracket and is secured with two
rubber bushings, three retainers and a nut.
Ball joint assemblies are bolted to the outer end of
the upper and lower control arm and are attached
to the steering knuckle by nuts and cotter pins.
The inner ends of the upper control arm have
pressed in bushings. Bolts passing through the
bushing, attach the control arm to the frame. The
inner ends of the lower control arm are attached to
the frame by bolts passing through the bushings,
which are pressed in the frame.
Side roll of the front suspension is controlled by a
spring steel stabilizer bar. It is mounted in rubber
bushings, which are held to the crossmember by
brackets. The ends of the stabilizer are connected
to the lower control arms by link bolts isolated by
rubber bushings.

FRONT SUSPENSION 3C – 3
ON-VEHICLE SERVICE
SHOCK ABSORBER
Removal Steps
1. Bolt, nut and washer
2. Nut
3. Rubber bushing and washer
4. Shock absorber
5. Rubber bushing and washer
Installation Steps
5. Rubber bushing and washer
4. Shock absorber
3. Rubber bushing and washer
2. Nut
1. Bolt, nut and washer
REMOVAL
Preparation:
1) Raise the vehicle and support it with suitable safety
stands.
2) Remove wheel and tire assembly. Refer to “Wheels
and Tires” in section 3E.
1. Bolt, Nut and Washer
2. Nut
3. Rubber Bushing and Washer
4. Shock Absorber
5. Rubber Bushing and Washer
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
•Shock absorber
•Rubber bushing

3C – 4 FRONT SUSPENSION
INSTALLATION
5. Rubber Bushing and Washer
4. Shock Absorber
3. Rubber Bushing and Washer
2. Nut
Shock Absorber Nut Torque N·m (kg·m/lb·ft)
20 (2.0 / 14)
1. Bolt, Nut and Washer
Shock Absorber Nut Torque N·m (kg·m/lb·ft)
82 (8.4 / 61)

FRONT SUSPENSION 3C – 5
STABILIZER BAR
Removal Steps
1. Nut and washer
2. Link
3. Bracket
4. Stabilizer bar
5. Rubber bushing
Installation Steps
5. Rubber bushing
4. Stabilizer bar
3. Bracket
2. Link
1. Nut and washer
REMOVAL
Preparation:
1) Raise the vehicle and support the frame with suitable
safety stands.
2) Remove the stone guard.
3) Remove wheel and tire assembly. Refer to “Wheels
and Tires” in section 3E.
1. Nut and Washer
CAUTION:
Be careful not to break the ball joint boot.
2. Link
3. Bracket
4. Stabilizer Bar
5. Rubber Bushing

3C – 6 FRONT SUSPENSION
INSPECTION AND REPAIR
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
•Stabilizer bar
•Rubber bushing
•Link ball joint
INSTALLATION
5. Rubber Bushing
4. Stabilizer Bar
3. Bracket
Bracket Nut Torque N·m (kg·m/lb·ft)
22 (2.2 / 16)
2. Link
1. Nut and Washer
Link Nut Torque N·m (kg·m/lb·ft)
50 (5.1 / 37)

FRONT SUSPENSION 3C – 7
TORSION BAR
Removal Steps
1. Adjust bolt, end piece and seat
2. Height control arm
3. Torsion bar
Installation Steps
3. Torsion bar
2. Height control arm
1. Adjust bolt, end piece and seat
REMOVAL
Preparation:
Raise the vehicle and support the frame with suitable
safety stands.
1. Adjust Bolt, End Piece and Seat
Apply the setting marks to the adjust bolt and end
piece.