Front Suspension - Chevrolet 1974 Light Duty Truck Service Manual

FRONT WHEEL BEARING DIAGNOSIS
A B R A S I V E ROLLER W E A R
PATTERN ON RACES AND ROLLERS CAUSED BY
FINE ABRASIVES.
CLEAN A LL PARTS AND HOUSINGS. CHECK SEALS
AND BEARINGS AND REPLACE IF LEAKING, ROUGH
OR NOISY.
A B R A S I V E STEP W E A R
PATTERN ON ROLLER ENDS CAUSED BY
FINE ABRASIVES.
CLEAN A LL PARTS AND HOUSINGS. CHECK SEALS
AND BEARINGS AND REPLACE IF LEAKING, ROUGH
OR NOISY.
H i l l
I N D E N T A T I O N S
SURFACE DEPRESSIONS ON RACE AND ROLLERS
CAUSED BY HARD PARTICLES OF FOREIGN MATERIAL.
CLEAN A LL PARTS AND HOUSINGS. CHECK SEALS
AND REPLACE BEARINGS IF ROUGH OR NOISY.
CONSIDER THE FOLLOWING FACTORS WHEN DIAGNOSING BEARING CONDITION:
1. GENERAL CONDITION OF A LL PARTS DURING DISASSEMBLY AND INSPECTION.
2. CLASSIFY THE FAILURE WITH THE AID OF THE ILLUSTRATIONS.
3. DETERMINE THE CAUSE.
4. MAKE A LL REPAIRS FOLLOWING RECOMMENDED PROCEDURES
G A L L I N G
METAL SMEARS ON ROLLER ENDS DUE TO OVERHEAT,
LUBRICANT FAILURE OR OVERLOAD (WAGON'S)
REPLACE BEARING - CHECK SEALS AND CHECK
FOR PROPER LUBRICATION.
E T C H I N G
BEARING SURFACES APPEAR GRAY OR GRAYISH
BLACK IN COLOR WITH RELATED ETCHING AWAY
OF M ATERIAL USUALLY AT ROLLER SPACING.
REPLACE BEARINGS CHECK SEALS AND CHECK
FOR PROPER LUBRICATION.
C A G E W E A R
WEAR AROUND OUTSIDE DIAMETER OF CAGE AND
ROLLER POCKETS CAUSED BY ABRASIVE M ATERIAL
AND INEFFICIENT LUBRICATION.
CLEAN RELATED PARTS AND HOUSINGS.
CHECK SEALS AND REPLACE BEARINGS.
Fig. 48— Bearing Diagnosis

FRONT SUSPENSION

BENT C A G E
CAGE DAMAGE DUE TO IMPROPER HANDLING
OR TOOL USAGE.
REPLACE BEARING.
*
B E N T C A G E
CAGE DAMAGE DUE TO IMPROPER HANDLING
OR TOOL USAGE
REPLACE BEARING
M I S A L I G N M E N T
OUTER RACE MISALIGNMENT
CLEAN RELATED PARTS AND REPLACE BEARING.
MAKE SURE RACES ARE PROPERLY SEATED.
LIGHT DUTY TRUCK SERVICE MANUAL
3-35