Dodge D150 1990 Service Manual page 258

Rear wheel drive ram truck
Table of Contents

Advertisement

BRAKES
5 - 49
Fig. 4 Removing/Installing Shoe Holddown Springs
(6) Disconnect p a r k i n g brake cable from p a r k i n g
brake lever.
(7) Remove b o t h brakeshoes,
shoe-to-shoe
lower
spring a n d adjuster n u t as assembly (Fig. 5).
(8) If-support plate or wheel cylinder are t o be ser-
viced, remove anchor bolt a n d n u t t h a t
attaches
p a r k i n g b r a k e lever t o support plate. Then remove
lever, washer, spring, cam plate, anchor bolt b u s h i n g
and adjuster cable ( F i g . 1).
Fig. 5 Removing/Installing Brakeshoes
CLEANING AND INSPECTION
Clean t h e brake components, i n c l u d i n g t h e support
plate a n d wheel
cylinder exterior, w i t h a w a t e r
dampened cloth or w i t h Mopar brake cleaner. D o n o t
use compressed a i r .
Replace t h e brakeshoes i f w o r n t o w i t h i n .76 m m
(.030 i n ) o f the r i v e t heads or i f bonded l i n i n g i s less
t h a n 1.57 m m (1/16 i n ) t h i c k . E x a m i n e t h e l i n i n g
contact p a t t e r n to determine i f the shoes are b e n t or
t h e d r u m i s tapered. T h e l i n i n g should e x h i b i t con-
tact across t h e entire w i d t h . Shoes e x h i b i t i n g contact
o n l y o n one side should be replaced a n d t h e d r u m
checked for r u n o u t or taper.
Clean a n d inspect t h e adjusting n u t a n d p i v o t
screw assembly. Replace t h e assembly i f t h e star
wheel threads on t h e n u t are damaged, or t h e screw
are severely rusted or corroded.
Discard t h e brake springs and retainer components
i f w o r n distorted, or collapsed. Also replace t h e
springs i f a brake drag condition h a d occurred. Over-
h e a t i n g w i l l distort and weaken t h e springs.
Inspect t h e brakeshoe contact pads o n t h e support
plate (Fig. 6). Remove l i g h t r u s t a n d scale from t h e
pads w i t h fine sandpaper. However, replace t h e sup-
port plate i f a n y o f t h e pads are w o r n or r u s t e d
t h r o u g h . Also replace t h e plate i f i t is bent or dis-
torted.
Fig. 6 Support Plate Brakeshoe Contact Pads
BRAKE SHOE INSTALLATION
(1) I f p a r k i n g brake lever was removed, i n s t a l l a n -
chor bolt bushing, cam plate, lever, spring, washer
and anchor bolt and n u t (Fig. 1).
(2) Coat contact pads on support plate (Fig. 6) w i t h
M o p a r h i g h temperature grease, or equivalent.
(3) I f b o t h sets of brakeshoes were removed, verify
t h a t adjusting nuts are installed o n correct side o f
vehicle. Pivot screw and adjusting n u t have left h a n d
threads o n left side brake assembly a n d r i g h t h a n d
threads on r i g h t side assembly.
(4) Lubricate and assemble adjusting n u t a n d p i v o t
screw.
(5)
Assemble adjusting n u t , shoe-to-shoe
lower
s p r i n g a n d both brakeshoes. Then position t h e as-
sembled components on t h e support plate.

Advertisement

Table of Contents
loading

Table of Contents