Chevrolet 1980 Light Duty Truck Service Manual page 273

a. Ball joints and steering linkage need lubrication
b. Shock absorber loose or bushings worn
.
c Worn control arm bushings
d. Worn tie rod ends
e.
Worn or loose wheel bearings
f. Loose stabili/er bar
O
Loose wheel nuts
h. Spring improperly positioned
i. Loose suspension bolts
a.
Tire and wheel out o f balance
b. Tire and wheel out o f round
.
C
Blister or bump on tire
d. Improper shock absorber action
a. Underinflated or overinflated tires
b.
Im proper toe-in
c. Wheels out of balance
d. Hard Driving
e. Over loaded vehicle
a. Toe-in incorrect
b. Excessive speed on turns
c. Tires improperly inflated
d. Suspension arm bent or twisted
a. Front shock absorbers defective
b. Worn ball joints
c. Wheel bearings incorrectly adjusted or worn
d. Wheel and tire out o f balance
e. Excessive tire or wheel runout
SHOCK ABSORBER DIAGNOSIS
ON VEHICLE CHECKS
(Follow the Procedures Outlined Below in the Order
Indicated).
NOISE IN F R O N T END
Probable Cause
W HEEL TR A M P
EXCESSIVE OR U N E V E N T IR E W EAR
SC U FFED TIR E S
CUPPED T IR E S
Fig. 3C-5~Front Suspension Diagnosis Chart B
FRONT SUSPENSION
Probable Remedy
a. Lubricate at recommended intervals
b.
Tighten bolts and/or replace bushings
Replace bushings
c.
d. Replace tie rod ends
e. Adjust or replace wheel bearings
f. Tighten all stabili/er bar attachments
Tighten the wheel nuts to proper torque
g-
h. Reposition
i. Torque to specifications or replace
a. Balance wheels
b. Replace tire
c. Replace tire
d. Replace shock absorber
a. Inflate tire to proper recommended pressure
b. Adjust toe-in
c. Balance wheels
d. Instruct driver
e. Instruct driver
a. Adjust toe-in to specifications
b. Advise driver
c. Inflate tires to proper recommended pressure
d. Replace arm
a. Replace shock absorbers
b. Replace ball joints
c. Adjust or replace wheel bearings
d. Balance wheel and tire
e. Compensate for runout
Prelim inary Inspection and Ride Test:
Tlre Pressure
Check tire pressure compare to vehicle specifications
anc* adjust as required. Poor vehicle control and ride
complaints are caused in many cases by improper tire
inflation.
3C-5
LIG H T T R U C K SER V IC E M AN U AL