Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual - part 584

POWER ASSISTED SYSTEM

2A–65

Special Tools

ILLUSTRATION

TOOL NO.

TOOL NAME

J–29752

Steering wheel remover

FRONT SUSPENSION

3C–1

TROOPER

SUSPENSION

CONTENTS

Front Suspension

3C–1

. . . . . . . . . . . . . . . . . . . . . . . 

Rear Suspension

3D–1

. . . . . . . . . . . . . . . . . . . . . . . . 

Wheel and Tire System

3E–1

. . . . . . . . . . . . . . . . . . 

FRONT SUSPENSION

CONTENTS

Service Precaution

3C–1

. . . . . . . . . . . . . . . . . . . . . . 

General Description

3C–2

. . . . . . . . . . . . . . . . . . . . . 

General Diagnosis

3C–3

. . . . . . . . . . . . . . . . . . . . . . . 

Shock Absorber

3C–6

. . . . . . . . . . . . . . . . . . . . . . . . . 

Shock Absorber and Associated Parts

3C–6

. . . . 

Removal

3C–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–6

. . . . . . . . . . . . . . . . . . 

Installation

3C–6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Stabilizer Bar

3C–7

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Stabilizer Bar and Associated Parts

3C–7

. . . . . . 

Removal

3C–7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–7

. . . . . . . . . . . . . . . . . . 

Installation

3C–7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Torsion Bar

3C–8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Torsion Bar and Associated Parts

3C–8

. . . . . . . . 

Removal

3C–8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–9

. . . . . . . . . . . . . . . . . . 

Installation

3C–9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Knuckle

3C–11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Knuckle and Associated Parts

3C–11

. . . . . . . . . . . 

Removal

3C–11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–12

. . . . . . . . . . . . . . . . . . 

Installation

3C–12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Upper Control Arm

3C–14

. . . . . . . . . . . . . . . . . . . . . . 

Upper Control Arm and Associated Parts

3C–14

. 

Removal

3C–14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–15

. . . . . . . . . . . . . . . . . . 

Installation

3C–16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Lower Control Arm

3C–18

. . . . . . . . . . . . . . . . . . . . . . 

Lower Control Arm and Associated Parts

3C–18

. 

Removal

3C–18

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–19

. . . . . . . . . . . . . . . . . . 

Installation

3C–20

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Upper Ball Joint

3C–21

. . . . . . . . . . . . . . . . . . . . . . . . . 

Upper Ball Joint and Associated Parts

3C–21

. . . . 

Removal

3C–21

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–22

. . . . . . . . . . . . . . . . . . 

Installation

3C–22

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Lower Ball Joint

3C–23

. . . . . . . . . . . . . . . . . . . . . . . . . 

Lower Ball Joint and Associated Parts

3C–23

. . . . 

Removal

3C–23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Inspection and Repair

3C–24

. . . . . . . . . . . . . . . . . . 

Installation

3C–24

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 

Main Data and Specifications

3C–25

. . . . . . . . . . . . . 

Special Tools

3C–26

. . . . . . . . . . . . . . . . . . . . . . . . . . . 

Service Precaution

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS).  REFER TO THE SRS
COMPONENT AND WIRING LOCATION VIEW IN
ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING.  WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING, REFER TO
THE SRS SERVICE INFORMATION.  FAILURE TO
FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION: Always use the correct fastener in the
proper location.  When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal.  ISUZU will also call out
the fasteners that require thread lockers or thread
sealant.  UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or other
corrosion inhibitors) on threaded fasteners or
fastener joint interfaces.  Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.  When
you install fasteners, use the correct tightening
sequence and specifications.  Following these
instructions can help you avoid damage to parts and
systems.  

SECTION

3C–2

FRONT SUSPENSION

General Description

C03RW001

Legend

(1) Shock Absorber
(2) Upper Control Arm
(3) Height Control Arm

(4) Torsion Bar
(5) Link
(6) Lower Control Arm
(7) Stabilizer Bar

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.
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.
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

FRONT SUSPENSION

3C–3

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 bar are connected to the lower control
arms by links.

General Diagnosis

Condition

Possible cause

Correction

Vehicle Pulls

Mismatched or uneven tires.

Replace tire.

Tires not adequately inflated.

Adjust tire pressure.

Broken or sagging springs.

Replace spring.

Radial tire lateral force.

Replace tire.

Improper wheel alignment.

Adjust wheel alignment.

Brake dragging in one wheel.

Repair brake.

Loose, bent or broken front or rear
suspension parts.

Tighten or replace the appropriate
suspension part(s).

Faulty shock absorbers.

Replace shock absorber.

Abnormal or Excessive Tire Wear

Sagging or broken spring.

Replace spring.

Tire out of balance.

Balance or replace tire.

Improper wheel alignment.

Check front end alignment.

Faulty shock absorber.

Replace shock absorber.

Hard driving.

Replace tire.

Overloaded vehicle.

Replace tire and reduce load.

Tires not rotated periodically.

Replace or rotate tire.

Worn or loose road wheel bearings.

Replace wheel bearing.

Wobbly wheel or tires.

Replace wheel or tire.

Tires not adequately inflated.

Adjust the pressure.

Wheel Hop

Blister or bump on tire.

Replace tire.

Improper shock absorber operation.

Replace shock absorber.

Shimmy, Shake or Vibration

Tire 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 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 gear.

Tighten housing bolts.

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.