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DIFFERENTIAL A N D REAR AXLE BEARING DIAGNOSIS
A B R A S I V E
R OL LER
W E A R
P A T T E R N ON RACES A N D R O LLE R S CAU SED BY
FINE ABRA S IVES.
C L E A N A L L PARTS A N D HOUSINGS. CHECK SEALS
A N D BEA R IN G S A N D REPLACE IF L E A K IN G . ROUGH
OR N O ISY.
A B R A S I V E
STEP W E A R
P A T T E R N ON R O LLE R E N D S C A U S E D BY
FIN E A B R A S IV E S .
C L E A N A L L PARTS A N D HO USIN GS. CHECK SEALS
A N D B E A R IN G S A N D REPLACE IF L E A K IN G , ROUGH
OR NOISY
I N D E N T A T I O N S
SURFACE DEPRESSIONS ON RACE A N D R O LLER S
CA U S ED BY H A R D P A R T IC LES OF FO R EIG N M A T E R IA L .
C L E A N A L L PARTS A N D HO USINGS CHECK SEALS
A N D R EPLACE B E A R IN G S IF ROUGH OR NOISY.
CO NSIDER THE FO LLO W IN G FAC TO R S W HEN D IA G N O S IN G B E A R IN G C O N D IT IO N :
1.
G E N E R A L C O N D IT IO N OF A L L PARTS D U R IN G D ISASSEM B LY A N D IN SPECTION
2. C L A S S IF Y THE F A IL U R E W ITH THE A ID OF THE IL L U S T R A T IO N S
3.
D E T E R M IN E THE CAUSE.
4.
M A K E A L L REPAIRS F O LLO W IN G RECO M M END ED PROCEDURES
G A L L I N G
M E T A L SMEARS ON R O LLE R ENDS DUE TO O V E R H E A T
L U B R IC A N T F A IL U R E OR O V E R L O A D (W AGON'S)
REPLACE B E A R IN G
CHECK SEALS A N D CHECK
FOR PROPER L U B R IC A T IO N .
E T C H I N G
B E A R IN G SU RFAC ES APPEAR G R A Y OR G R A Y IS H
BLA C K IN CO LO R W ITH R E L A T E D ETCHIN G A W AY
OF M A T E R IA L U S U A L L Y AT R O LLE R SPACING.
R EPLACE B E A R IN G S
CHECK SEALS A N D CHECK
FOR PROPER LU B R IC A T IO N .
C A G E W E A R
W EAR A R O U N D OU TSID E D IA M E T E R OF CAGE A N D
R O LLE R POCKETS C AUSED BY A B R A S IV E M A T E R IA L
A N D IN E F F IC IE N T L U B R IC A T IO N .
C LE A N R E L A T E D P AR TS A N D HOUSINGS.
CHECK SEALS A N D REPLAC E BEAR IN G S .
Fig. 81 —Differential and Axle Bearing Diagnosis Chart A
REAR S U S P E N S IO N A N D DRIVELINE
BE NT C A G E
CAGE D A M A G E DUE TO IM PROPER H A N D L IN G
OR TOOL USAGE
REPLACE B EAR IN G
B E N T
CAGE D A M A G E DUE TO iM PHUPER H A N D L IN G
OR T O O L USAGE
REPLACE B E A R IN G .
M I S A L I G N M E N T
OUTER RACE M IS A L IG N M E N T DUE TO FO R EIG N
OBJECT.
C LE A N R E L A T E D PARTS A N D R EPLACE BE A R IN G .
M A K E SURE RACES AR E PR O PER LY SEATED.
4 -3 9
C A G E
LIGHT DUTY TRUCK SERVICE MANUAL
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