Dodge D150 1990 Service Manual page 259

5 - 50 BRAKES
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(6) I n s t a l l brakeshoe holddown springs a n d pins
(Fig. 4). B e sure holddown pins are seated i n support
plate a n d springs are connected as shown (Fig. 7).
BRAKE SHOE WEB
SHOE
HOLD DOWN
SPRING
\
HOLD DOWN PIN
\
BACKING PLATE RN1064
Fig. 7 Holddown Spring And Pin Attachment
(7) Connect p a r k i n g brake cable t o p a r k i n g brake
lever. B e sure cable e n d i s properly secured i n lever
(Fig. 8).
J90Q5-118
Fig. 8 Connecting Parking Brake Cable
(8) I n s t a l l shoe-to-shoe upper spring (Fig. 3).
(9) Position adjuster lever r e t u r n spring on pivot.
(10) I n s t a l l adjuster lever.
(11) A t t a c h adjuster cable to adjuster lever. Be sure
cable i s properly routed.
(12) A d j u s t brakeshoes t o d r u m w i t h brake gauge.
BRAKE DRUM INSTALLATION
(1) Position d r u m o n axle housing.
(2) I n s t a l l bearing a n d inner n u t . Adjust b e a r i n g as
described i n Group 3.
(3) I n s t a l l locking washer a n d outer n u t . Bend
l o c k i n g washer t o secure i t .
(4) Place n e w gasket o n hub and i n s t a l l axle shaft,
cones, lock washers a n d nuts.
(5) I n s t a l l wheel a n d t i r e assembly.
(6) Remove support stands and lower vehicle.
BRAKE DRUM SERVICE
BRAKE DRUM REFINISHING
The brake drums can be resurfaced o n a d r u m
l a t h e w h e n necessary. I n i t i a l m a c h i n i n g cuts should
be l i m i t e d to .12 - .20 m m (.005 -.008 i n ) a t a t i m e as
heavier feed rates can produce taper a n d surface
v a r i a t i o n . F i n a l f i n i s h cuts o f .025 t o .38 m m (.001 t o
.0015 i n ) are recommended a n d w i l l generally pro-
vide t h e best surface finish.
Be sure t h e d r u m i s securely m o u n t e d i n t h e l a t h e
before m a c h i n i n g operations. A damper strap should
always be used around t h e d r u m t o reduce v i b r a t i o n
a n d avoid chatter m p - k s .
BRAKE DRUM REFINISH LIMITS
The m a x i m u m allowable diameter o f t h e d r u m
b r a k i n g surface is stamped or cast i n t o t h e d r u m
outer edge ( F i g . 9). Generally, a n 1 1 i n c h d r u m can
be machined t o a m a x i m u m o f 11.060 i n c h . A l w a y s
replace t h e d r u m i f m a c h i n i n g w o u l d cause d r u m d i -
ameter to exceed indicated size l i m i t .
MAXIMUM ALLOWABLE
DIAMETER FOR
REFAONG
RB762A
Fig. 9 Location Of Brake Drum Maximum Allowable
Diameter
BRAKE DRUM RUNOUT
Measure d r u m diameter and r u n o u t w i t h a n accu-
rate gauge. The most accurate method o f measure-
m e n t involves m o u n t i n g t h e d r u m i n a b r a k e l a t h e
a n d checking v a r i a t i o n and r u n o u t w i t h a d i a l i n d i -
cator. V a r i a t i o n s i n d r u m diameter should n o t exceed
.076 m m (.003 i n ) . D r u m r u n o u t should n o t exceed
.20 m m (.008 i n ) o u t of round. Refinish t h e d r u m i f
r u n o u t or v a r i a t i o n exceed these values.