GMC 1976 ZEO 6083 Maintenance Manual page 131

3A- 2
FRONT SUSPENSION
FRONT SUSPENSION TROUBLE DIAGNOSIS
Problem Possible Cause
Correction
Hard Steering .
1 . Ball joints and
1 . Lubricate ball joints and linkage.
steering linkage need
lubrication .
2. Low or uneven front
2 . Inflate tires to the proper
tire pressure .
recommended pressure .
3. Power steering
3 . Check power steering compo-
partially or not operative.
nents for proper operation.
4. Steering gear not
4. Adjust steering gear .
properly adjusted .
See Section 9.
Front Wheel Shimmy
1 . Tire and wheel out of
1 . Balance tires, check run-out.
(Smooth Road Shake) .
balance, or out of round.
2 . Worn tire rod ends .
2. Replace tire rod end.
3 . Worn ball joints
3. Replace ball joints .
4. Malfunctioning shock
4. Diagnose shock absorbers.
absorber .
Vehicle Pulls to One
1 . Low or uneven tire
1 . Inflate tires to the proper
Side (No Braking Action) . pressure .
recommended pressure .
2. Broken or sagging
2 . Replace torsion bar.
torsion bar.
3. Incorrect front wheel
3 . Check and align front suspension .
alignment (Camber) .
Poor Directional 1 . Ball joints and
1 . Lubricate at proper intervals.
Stability
steering linkage need
lubrication .
2 . Low or uneven front or
2. Inflate tires to the proper
rear tire pressure .
recommended pressure .
3 . Steering Gear not on
3 . Adjust steering gear .
high point.
See Section 9.
4. Incorrect front wheel
4. Check and align front suspension .
alignment (caster) .
5. Broken torsion bar .
5. Replace torsion bar .
6. Malfunctioning shock
6. Diagnose shock absorbers .
absorber.
7. Broken stabilizer bar,
7 . Replace stabilizer or link .
or missing link .
Excessive Play in
1 . Incorrect steering gear
1. Adjust steering gear .
Steering .
adjustment.
See Section 9.
2. Worn steering gear
2. Overhaul Gear .
p a r t s . See Section 9.