air suspension ISUZU AXIOM 2002 Service User Guide

FRONT SUSPENSION3C±3
Condition CorrectionPossible cause
Shimmy, Shake or VibrationTire or wheel out of balance.Balance wheels or replace tire/or
wheel.
Loose wheel bearings.Replace wheel bearing.
Worn steering linkage ball joints.Replace ball joints.
Worn upper or lower end ball joints.Replace ball joints.
Excessive wheel runout.Repair or replace wheel and/or tire.
Blister or bump on tire.Replace tire.
Excessive loaded radial runout of
tire/wheel assembly.Replace tire or wheel.
Improper wheel alignment.Check wheel alignment.
Loose or worn steering linkage.Tighten or replace steering linkage.
Loose steering unit.Tighten steering unit.
Tires not adequately inflated.Adjust tire pressure.
Loose, bent or broken front or rear
suspension parts.Tighten or replace the appropriate
suspension parts.
Faulty shock absorber.Replace shock absorber.
Hub bearing preload misadjustment.Adjust preload.
Parts in power steering valve
defective.Replace power steering unit.
Hard SteeringBind in steering linkage ball studs,
upper or lower ball joint.Replace ball joint.
Improper wheel alignment.Check wheel alignment.
Tire not adequately inflated.Inflate tires to proper pressure.
Bind in steering column or shaft.Repair or replace.
Improper power steering system
operation.Repair or replace. Refer to Steering
section.
Too Much Play In SteeringWheel bearings worn.Replace wheel bearings.
Loose steering unit or linkage.Retighten or repair.
Worn or loose steering shaft
universal joint.Retighten or replace steering shaft.
Worn steering linkage ball joints.Replace ball joints.
Worn upper or lower end ball joints.Replace ball joints.
Poor Steering Wheel ReturnabilityBind in steering linkage ball joints.Replace ball joints.
Bind in upper or lower ball joints.Replace ball joints.
Bind in steering column and shaft.Repair or replace.
Bind in steering gear.Check and repair steering gear.
Improper wheel alignment.Adjust wheel alignment.
Tires not adequately inflated.Adjust pressure.
Loose steering wheel nut.Retighten.
Worn wheel bearing.Replace.

3C±4FRONT SUSPENSION
Condition CorrectionPossible cause
Abnormal NoiseWorn, sticky or loose upper or lower
ball joint, steering linkage ball joints
or drive axle joints.Replace.
Faulty shock absorbers.Replace.
Worn upper or lower control arm
bushing.Replace.
Loose stabilizer bar.Retighten bolts or replace bushings.
Loose wheel nuts.Tighten nuts. Check for elongated
wheel nut holes. Replace wheel if
required.
Loose suspension bolts or nuts.Retighten suspension bolts or nuts.
Broken or otherwise damaged wheel
bearings.Replace wheel bearing.
Broken suspension springs. Replace spring.
Loose steering unit. Retighten mounting bolt.
Faulty steering unit.Replace steering unit.
Wandering or Poor Steering StabilityMismatched or unevenly worn tires.Replace tire or inflate tires to proper
pressure.
Loose steering linkage ball joints.Replace ball joints.
Faulty shock absorbers.Replace shock absorber.
Loose stabilizer bar.Tighten or replace stabilizer bar or
bushings.
Broken or sagging springs.Replace spring (pairs).
Improper wheel alignment.Adjust wheel alignment.
Erratic Steering When BrakingWorn wheel bearings.Replace wheel bearings.
Broken or sagging springs.Replace spring (pairs).
Leaking caliper.Repair or replace caliper.
Warped discs.Replace brake disc.
Badly worn brake pads.Replace brake pads.
Tires are inflated unequally.Inflate tires to proper pressure.
Low or Uneven Trim HeightBroken or sagging springs.Replace springs (In pairs).
Vehicle overloaded.Reduce load.
Incorrect springs.Adjust or replace torsion bar.
Suspension BottomsVehicle overloaded. Reduce load.
Faulty shock absorber.Replace shock absorber.
Incorrect, broken or sagging springs.Replace springs.
Body LeansLoose stabilizer bar.Tighten stabilizer bar bolts or replace
bushings.
Faulty shock absorber, struts or
mounting.Replace shock absorber.
Broken or sagging springs.Replace springs (In pairs).
Vehicle overloaded.Reduce load.
Cupped TiresWorn wheel bearings.Replace wheel bearing.
Excessive tire or wheel run out.Replace tire or wheel.
Worn ball joints.Replace ball joints.
Tire out of balance.Adjust tire balance.

FRONT SUSPENSION3C±5
Shock Absorber
Shock Absorber and Associated Parts
450R200001
Legend
(1) Nut
(2) Rubber Bushing and Washer
(3) Bolt and Nut
(4) Shock Absorber(5) Rubber Bushing and Washer
(6) Actuator Bracket
(7) Actuator
(8) Screw
Removal
1. Raise the vehicle and support it with suitable safety
stands.
2. Remove wheel and tire assembly. Refer to
Wheel
Replacement in this section.
3. Remove bolt and nut.
4. Remove ISC Actuator and Bracket. Refer to
Intelligent Suspension.
5. Remove nut.
6. Remove rubber bushing and washer.
7. Remove shock absorber.
8. Remove 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.
Check the following parts :
Shock absorber

Rubber bushing
Installation
1. Install rubber bushing and washer.
2. Install shock absorber.
3. Install rubber bushing and washer.
4. Install nut, then tighten it to the specified torque.
Torque: 20 N´m (14 lb ft)
5. Install ISC Actuator and Bracket. Refer to
Intelligent
Suspension.
6. Install bolt and nut, then tighten to the specified
torque.
Torque: 93 N´m (69 lb ft)

3C±6FRONT SUSPENSION
Stabilizer Bar
Stabilizer Bar and Associated Parts
410R200001
Legend
(1) Rubber Bushing
(2) Bracket and Bolt
(3) Link(4) Nut
(5) Stabilizer Bar
(6) Washer
Removal
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
Wheel
Replacement in this section.
4. Remove nut.
CAUTION: Be careful not to break the ball joint boot.
5. Remove link.
6. Remove bracket.
7. Remove stabilizer bar.
8. Remove rubber bushing.
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 :

Stabilizer bar

Rubber bushing

Link ball joint
Installation
1. Install rubber bushing.
2. Install stabilizer bar.
3. Install bracket, then tighten it to the specified torque.
Torque: 25 N´m (18 lb ft)
4. Install link and Washer.
5. Install nut, then tighten it to the specified torque.
Torque: 50 N´m (37 lb ft)

3C±8FRONT SUSPENSION
3. Apply the setting marks(2) to the height control arm
and torsion bar, then remove height control arm.
410RS005
4. Apply the setting marks(3) to the torsion bar and
lower control arm, then remove torsion bar.
410RS006
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:

Torsion bar

Height control arm

Adjust bolt

Rubber seat
Installation
1. Apply grease to the serrated portions, then install
torsion bar. Make sure the bars are on their correct
respective sides and align the setting marks(3).
410RS007
410RS006

FRONT SUSPENSION3C±11
9. Remove back plate.
10. Remove lower ball joint by using remover J±29107.
CAUTION: Be careful not to damage the ball joint
boot.
901RW163
11. Remove upper ball joint by using remover J±36831.
CAUTION: Be careful not to damage the ball joint
boot.
901RW162
12. Remove knuckle assembly.
13. Remove oil seal (Except 2WD model).
14. Remove washer (Except 2WD model).15. Remove needle bearing by using remover J±23907
(Except 2WD model).
901RW044
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:

Knuckle

Knuckle arm

Needle bearing

Thrust washer
Installation
1. Apply appropriate amount of multipurpose type
grease to the new bearing (Approx. 5 g) and install
needle bearing by using installer J±36838 and
J±8092 (Except 2WD model).
901RW045

3C±14FRONT SUSPENSION
CAUTION: Be careful not to damage the ball joint
boot.
901RW162
7. Remove upper ball joint.
8. Remove bolt and plate.
9. Remove nut assembly.
10. Remove camber shims and note the positions and
number of shims.
11. Remove caster shims and note the positions and
number of shims.
12. Remove upper control arm assembly.
13. Remove nut.
14. Remove plate.
15. Remove bushing by using remover J±29755.
901RW161
901RW160
16. Remove fulcrum pin.
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
1. Install fulcrum pin.
2. Install bushing by using installer J±29755 and
J±39376.
901RW164

FRONT SUSPENSION3C±17
6. Remove front nut.
7. Remove rear nut.
8. Remove torsion bar, refer to
Torsion Bar in this
section.
9. Remove torsion bar arm bracket.
10. Disconnect the stabilizer link at the lower control arm.
11. Remove the shock absorber lower end from the lower
control arm.
12. Remove the lower ball joint from the lower control
arm.
13. Remove front bolt.
14. Remove rear bolt.
15. Remove lower control arm.
16. Remove torsion bar arm bolt.
17. Remove lower ball joint bolt.
18. Remove front bushing by using remover J±36833.
901RW154
901RW155
19. Remove rear bushing by using remover J±36834.
901RW051
901RW052
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

3C±20FRONT SUSPENSION
3. Remove upper ball joint nut and cotter pin, then use
remover J±36831 to remove the upper ball joint from
the knuckle.
CAUTION: Be careful not to damage the ball joint
boot.
901RW162
4. Remove bolt and nut.
5. Remove upper ball joint.
Inspection and Repair
Make necessary parts replacement if wear, damage,
corrosion or any other abnormal conditions are found
through inspection.

Inspect the lower end boot for damage or grease leak.
Move the ball joint as shown in the figure to confirm its
normal movement.

Inspect screw/taper area of ball for damage.

If any defects are found by the above inspections,
replace the ball joint assembly with a new one.
450RS023

After moving the ball joint 4 or 5 times, attach nut then
measure the preload.
Starting torque: 0.5 ±3.2 N´m (0.4±2.4 lb ft)
450RS024If the above limits specified are exceeded, replace the ball
joint assembly.
Installation
1. Install upper ball joint.
2. Install bolt and nut, then tighten them to the specified
torque.
Torque: 57 N´m (42 lb ft)
3. Install nut and cotter pin, then tighten the nut to the
specified torque with just enough additional torque to
align cotter pin holes. Install new cotter pin.
Torque: 98 N´m (72 lb ft)

3C±22FRONT SUSPENSION
7. Remove nut.
8. Remove bolt.
9. Remove lower ball joint.
Inspection and Repair
Make necessary parts replacement if wear, damage,
corrosion or any other abnormal condition are found
through inspection.

Inspect the lower end boot for damage or grease leak.
Move the ball joint as shown in the figure to confirm its
normal movement .

Inspect screw/taper area of ball for damage.

If any defects are found by the above inspections,
replace the ball joint assembly with a new one.
450RS026

After moving the ball joint 4 or 5 times, attach nut the
measure the preload.
Starting torque: 0.5±6.4 N´m (0.4±4.7 lb ft)
450RS024

If the above limits specified are exceeded, replace the
ball joint assembly.
Installation
1. Install lower ball joint.
2. Install bolt.
3. Install nut and tighten it to the specified torque.
Torque: 116 N´m (85 lb ft)
4. Install ball joint nut, then tighten it to the specified
torque with just enough additional torque to align
cotter pin holes. Install new cotter pin.
Torque: 147 N´m (108 lb ft)