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5 - 44
BRAKES
•
Inspect t h e brakeshoe contact pads o n t h e support
plate (Fig. 5). Remove l i g h t r u s t a n d scale f r o m t h e
pads w i t h fine sandpaper. However, replace t h e sup-
port plate i f any of 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 p l a t e i f i t is bent or dis-
torted.
Fig. 5 Shoe Contact Surfaces
BRAKE SHOE INSTALLATION
(1) Lubricate anchor p i n a n d brakeshoe
contact
pads on support plate (Fig. 5) w i t h Mopar m u l t i pur-
pose grease or L u b r i p l a t e .
(2) Lubricate adjuster screw socket, n u t , b u t t o n and
screw thread surfaces w i t h Mopar m u l t i
purpose
grease or L u b r i p l a t e .
(3) A t t a c h p a r k i n g brake cable t o lever. T h e n con-
nect lever to secondary shoe.
(4) I n s t a l l p r i m a r y shoe o n support plate. Secure
shoe w i t h new spring retainers and p i n (Fig. 6).
(5) I n s t a l l spring on p a r k i n g brake s t r u t a n d en-
gage s t r u t i n p r i m a r y show ( F i g . 6).
(6) I n s t a l l secondary shoe o n support plate (Fig. 6).
Insert s t r u t i n shoe and guide shoe onto anchor p i n .
Temporarily secure shoe w i t h r e t a i n i n g p i n .
(7) I n s t a l l anchor plate and adjuster cable eyelet on
support plate anchor p i n ,
(8) I n s t a l l cable guide i n secondary shoe a n d posi-
t i o n cable i n guide.
(9) Assemble adjuster screw (Fig. 7). Then i n s t a l l
and engage adjuster screw i n brakeshoes.
CAUTION: Be sure the adjuster screws are installed
on the correct brake unit. The adjuster screws are
marked L (left) and R (right) for identification (Fig.
8).
(10) I n s t a l l adjuster lever a n d spring a n d connect
adjuster cable to lever.
(11) I n s t a l l secondary shoe retainers and spring.
(12) I n s t a l l shoe spring. Connect spring to second-
ary shoe first. Then to p r i m a r y shoe.
Fig. 6 Brakeshoe Installation
WASHER
SOCKET
STAMPED LETTER
BUTTON
NUT
RH227A
Fig. 7 Adjuster Screw
Components
(13) Verify adjuster operation. P u l l adjuster cable
upward. Cable
should l i f t lever
a n d rotate s t a r t
wheel. Be sure adjuster lever properly engages s t a r t
wheel teeth.
(14) Adjust brakeshoes t o d r u m w i t h brake gauge
as described i n Service Adjustments section.
BRAKE DRUM INSPECTION AND REFINISHING
BRAKE DRUM
REFINISHING
The brake d r u m s c a n be resurfaced on a d r u m
lathe 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 of .025 to .038 m m (.001
to .0015 i n ) are recommended and w i l l generally pro-
vide t h e best surface f i n i s h .
Be sure t h e d r u m is securely mounted i n t h e lathe
before m a c h i n i n g operations. A damper strap should
always be used a r o u n d t h e d r u m to reduce v i b r a t i o n
and avoid chatter m a r k s .
BRAKE DRUM REFINISH
LIMITS
The m a x i m u m allowable diameter of 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 (Fig. 8). Generally, a d r u m can be m a -
chined to a m a x i m u m o f 1.52 m m (.060 i n ) oversize.
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