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BRAKES
5 - 7
(5) T u r n t h e adjuster star wheel (by hand) to ex-
pand or r e t r a c t the brakeshoes. Continue adjustment
u n t i l the gauge outside legs are a l i g h t drag-fit o n
t h e shoes (Fig. 2).
,
:
BRAKE SHOES
Fig. 2 Adjusting Brakeshoes To Gauge
(6) Repeat adjustment a t the opposite brakeshoe as-
sembly.
(7) I n s t a l l t h e brake drums and wheels a n d lower
the vehicle.
(8) Make f i n a l adjustment. D r i v e vehicle a n d make
one forward stop followed by one reverse stop. Repeat
procedure 8-10 times to actuate adjuster mechanism
and equalize adjustment. B r i n g vehicle to complete
standstill a t each stop. Incomplete, r o l l i n g stops w i l l
not activate t h e automatic adjusters.
ADJUSTMENT
WITH TOOL
C-3784
(1) Release p a r k i n g brakes f u l l y , i f applied. Be sure
there is slack i n t h e cables.
(2) Raise vehicle so a l l wheels are free to t u r n .
(3) Remove rubber plugs from access holes i n sup-
port plates.
(4) Insert a d j u s t i n g Tool C-3784 i n t o star wheel of
adjuster screw.
T u r n star wheel
counterclockwise
(move tool u p w a r d ) u n t i l a slight drag is felt w h e n
road wheel i s rotated.
(5) Insert a t h i n screwdriver or l e n g t h of w e l d i n g
rod into support plate access hole a n d push adjuster
lever out o f engagement w i t h star wheel (Fig. 3). Do
not bend t h e lever or distort the lever spring.
(6) H o l d adjuster lever away from star wheel. Then
back off star wheel t o u n t i l shoe drag on the d r u m is
eliminated.
(7) Repeat above adjustment a t the opposite wheel.
Be sure adjustment is equal.
(8) I n s t a l l access hole plugs i n support plate.
(9) Adjust t h e p a r k i n g brake after wheel brake ad-
justment.
(10) M a k e
f i n a l
adjustment. D r i v e vehicle a n d
make one f o r w a r d stop followed by one reverse stop.
Repeat procedure
8-10 times to actuate
adjuster
mechanism a n d equalize adjustment. B r i n g vehicle t o
complete s t a n d s t i l l a t each stop. Incomplete, r o l l i n g
stops w i l l not activate t h e automatic adjusters.
Fig. 3 Rear Brake Adjustment With Tool C-3784
TESTING
DRUM BRAKE
ADJUSTER
OPERATION
Place t h e vehicle on a hoist, w i t h a helper i n t h e
d r i v e r seat t o apply the brakes.
(2)
Remove t h e access plugs from t h e support
plates.
(3) Back off the adjuster screw star wheel approxi-
m a t e l y 30 notches.
(4) Observe t h e adjuster screw star wheel and spin
t h e d r u m a n d road wheel wheel rapidly i n t h e re-
verse direction. Have t h e helper apply t h e brakes
w i t h q u i c k l y and w i t h more t h a n n o r m a l force. F i r m
b r a k e application w i l l cause t h e secondary shoe to
move a n d engage t h e r o t a t i n g d r u m . The r e s u l t i n g
shoe wrap-up effect should move t h e secondary shoe
enough t o cause the adjuster cable to p u l l t h e ad-
j u s t e r lever u p and t u r n t h e star wheel.
BRAKE SYSTEM BLEEDING
The brake system can be bled m a n u a l l y or w i t h
pressure equipment. M a n u a l bleeding requires t h e
a i d o f a helper. Pressure equipment allows t h e sys-
t e m t o be bled by one person.
A l l models are equipped w i t h a front brake meter-
i n g (hold off) valve. The m e t e r i n g valve is located
w i t h i n t h e combination valve. The m e t e r i n g valve
balances brake action between t h e front disc a n d
rear d r u m brakes d u r i n g i n i t i a l brake application.
The m e t e r i n g valve is designed to hold off f l u i d
flow t o t h e f r o n t disc brakes a t pressures between 3
a n d 135 p s i (20.68 a n d 930.8 kPa). The pressures
generated b y g r a v i t y or m a n u a l type bleeding tech-
niques w i l l n o t affect t h e valve. However, pressure
bleeding equipment w i l l generate enough fluid pres-
sure (20 t o 30 psi) to close t h e valve a n d prevent
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