Chevrolet 1980 Light Duty Truck Service Manual page 360

5-6 BRAKES
C O N D IT IO N
P ulls
N o is e (h ig h p itc h e d s q u e a k
w ith o u t b r a k e a p p l i e d ) .
B ra k e ro u g h n e s s o r c h a tte r
(P e d a l P u ls a te s )
P O S SIB LE C A U S E
1. In c o rre c t tir e pressures.
2 . F ro n t e n d o u t o f lin e .
3 . U n m a tc h e d tire s on s a m e
a x le .
For r a d i a l tir e le a d
r e f e r to S e c tio n 3E .
4 . R estric ted b r a k e p ip e s
o r hoses.
5 . M a lfu n c tio n in g c a lip e r
a s s e m b ly .
6 . D e fe c tiv e o r d a m a g e d
shoe a n d lin in g (g r e a s e
o r b r a k e f lu id on
lin in g o r b e n t sh o e).
7 . M a lfu n c tio n in g r e a r
b r a k e s .
8 . Loose su sp e n sio n p a rts .
9 . Loose c a lip e r s .
1. Fro n t lin in g s w o rn o u t.
1. Excessive la t e r a l ru n o u t.
2 . P a r a lle lis m n o t w ith in
s p e c ific a tio n s .
3 . W h e e l B e a r in g s n o t
a d ju s te d .
4 . R e a r drum s o u t o f ro u n d .
C O R R E C T IO N
1. In f la t e e v e n ly on b o th sid es to
th e re c o m m e n d e d pressures.
2 . C h e c k a n d a li g n to m a n u fa c tu r e r 's
s p e c ific a tio n s .
3 . T ire s w ith a p p r o x im a t e ly th e
sa m e a m o u n t o f t r e a d sh o u ld
b e used on th e s a m e a x le .
4 . C h e c k f o r s o lf hoses a n d
d a m a g e d lin e s . R e p la c e w ith
n e w hoses a n d n e w d o u b le ­
w a l le d s te e l b r a k e t u b in g .
5 . C h e c k f o r stuck o r s lu g g is h
p isto n s, p r o p e r lu b r ic a t io n .
R em ove a n d r e b u ild c a lip e r .
6 . In s ta ll n e w sh oe a n d lin in g
in c o m p le te a x le sets.
7 . C h e c k f o r in o p e r a t iv e a u to
a d ju s tin g m e c h a n is m , d e fe c tiv e
lin in g (g r e a s e o r b r a k e
f lu id on lin in g ) o r
d e fe c tiv e w h e e l c y lin d e r s .
R e p a ir as n e c e s s a ry .
8 . C h e c k a n d to r q u e a l l
su spension m o u n tin g s to
s p e c ific a tio n s .
9 . C h e c k a n d to r q u e b o lts to
s p e c ific a tio n s .
1. R e p la c e lin in g s .
1. C h e c k p e r in s tru c tio n s a n d
r e p la c e o r m a c h in e r o to r,
if no t w ith in s p e c ific a tio n s .
2 . C h e c k p e r in s tru c tio n s a n d
r e p la c e o r m a c h in e th e ro to r,
if n o t w ith in s p e c ific a tio n s .
3 . A d ju s t w h e e l b e a r in g s to
c o rre c t s p e c ific a tio n s .
4 . C h e c k ru n o u t a n d , if n o t
w ith in s p e c ific a tio n s , tu rn
th e dru m s (n o t o v e r
m a x im u m o f 0 . 0 6 0 on th e
d ia m e t e r ) .
LIG H T T R U C K S ER V IC E M ANUAL