Chevrolet 1977 light duty truck Service Manual page 289

FRONT
Mil *
A B R A S I V E ROL LER W E A R
P A T T E R N ON RA CES A N D R O L L E R S C A U S E D BY
FtfJE A B R A S IV E S .
C L E A N A L L PA R TS A N D H O U S IN G S . C H E C K SEALS
A N D B E A R IN G S A N D R EPLACE IF L E A K IN G , R O U G H
O R N O IS Y .
%
A
Q *
A B R A S I V E ST EP W E A R
P A T T E R N ON R O L L E R EN D S C A U S E D BY
F IN E A B R A S IV E S .
C L E A N A L L PA R TS A N D H O U S IN G S . C H EC K SEALS
A N D B E A R IN G S A N D REPLACE IF L E A K IN G , R O U G H
O R N O IS Y .
f ill 1
I N D E N T A T I O N S
S U R F A C E D EPRESSIO NS O N RA C E A N D R O L L E R S
C A U S E D BY H A R D P A R T IC L E S O F F O R E IG N M A T E R IA L .
C L E A N A L L PA R TS A N D H O U S IN G S . C H EC K SEALS
A N D R EPLACE B E A R IN G S IF R O U G H OR N O IS Y .
WHEEL BEARING DIAGNOSIS
C O N S ID E R T H E F O L L O W IN G F A C T O R S W H E N 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 O F A L L P A R TS D U R IN G D IS A S S E M B L Y A N D IN SPEC TIO N .
2. C L A S S IF Y T H E F A IL U R E W IT H TH E A ID OF T H E IL L U S T R A T IO N S .
3. D E T E R M IN E T H E C AUSE.
4 M A K E A L L R E P A IR S F O L L O W IN G R E C O M M E N D E D PRO C ED U R ES.
G A L L I N G
M E T A L S M E A R S O N R O L L E R E N D S 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)
REPLA C E B E A R IN G C H EC K SE A LS 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 R FA C E S APPEAR G R A Y OR G R A Y IS H
B LACK IN C O LO R W IT H R E L A T E D E T C H IN G AW A Y
O F M A T E R IA L U S U A L L Y A T R O L L E R SPA C IN G .
REPLACE B E A R IN G S C H E C K S EA LS A N D CHECK
FOR PROPER L U B R IC A T IO N .
C A G E W E A R
W EAR A R O U N D O U T S ID E D IA M E T E R O F C A G E A N D
R O L L E R P OC K ETS C A U S E D 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 L E A N R E L A T E D P A R T S A N D H O U SIN G S.
C H EC K S EA LS A N D R E P LA C E B E A R IN G S .
Ill I V \
B E N T C A G E
CAGE D A M A G E DUE TO IM PRO PER H A N D L IN G
O R T O O L USAGE.
REPLA C E B E A R IN G .
%
B E N T C A G E
CAG E D A M A G E D UE TO IM PR OPER H A N D L IN G
OR TO O L U SA G E.
REPLACE B E A R IN G .
M I S A L I G N M E N T
O U T E R RACE M IS A L IG N M E N T DUE T O F O R E IG N
OBJECT.
C L E A N R E L A T E D PA R T S A N D R EP LA C E B E A R IN G .
M A K E SU R E R ACES A R E PR O P E R L Y SE A T E D .