Front Suspension - Isuzu 1999 RODEO Workshop Manual

FRONT SUSPENSION

3C–2
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 tie-rods which are
connected to steering arms on the knuckles, and to a
steering unit.
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
Diagnosis
Condition
Vehicle Pulls
Abnormal or Excessive Tire Wear
Wheel Hop
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, two 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
control arm are attached to the frame by bolts passing
through the bushings.
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 frame by brackets. The ends of the
stabilizer bar are connected to the lower control arms by
links.
Possible cause
Mismatched or uneven tires.
Tires not adequately inflated.
Broken or sagging springs.
Radial tire lateral force.
Improper wheel alignment.
Brake dragging in one wheel.
Loose, bent or broken front or rear
suspension parts.
Faulty shock absorbers.
Parts in power steering
defective.
Sagging or broken spring.
Tire out of balance.
Improper wheel alignment.
Faulty shock absorber.
Hard driving.
Overloaded vehicle.
Tires not rotated periodically.
Worn or loose road wheel bearings.
Wobbly wheel or tires.
Tires not adequately inflated.
Blister or bump on tire.
Improper shock absorber operation.
Correction
Replace tire.
Adjust tire pressure.
Replace spring.
Replace tire.
Adjust wheel alignment.
Repair brake.
Tighten or replace the appropriate
suspension part(s).
Replace shock absorber.
valve Replace power steering unit.
Replace spring.
Balance or replace tire.
Check front end alignment.
Replace shock absorber.
Replace tire.
Replace tire and reduce load.
Replace or rotate tire.
Replace wheel bearing.
Replace wheel or tire.
Adjust the pressure.
Replace tire.
Replace shock absorber.