5-6
1968
PONTIAC
SERVICE
MANUAL
SECONDARY
SHOE
RETURN
ACTUATING
AND
LINING
SPRING
LINK
\
I •
GUIDE
RETURN
SPRING
PRIMARY
SHOE
AND
LINING
PARKING
BRAKE
LEVER
WIHUillSL
CYUir
ADJUSTER
LIVER
SLEEVE
SP&il^G
\
MOLD
BOW?
SPRING
SPRING
\
4
t
PIN
RETURN
SOCKET
THRUST
\ADJUSTING
' NUT
SPRING
WASHER
SCREW
WASHER
Fig.
5-7
Typical
Self
Adjusting
Brake
Assembly
—
Exploded
View
—
Right
Hand
Side
Rear
NOTE:
Both front and rear brake mechanisms
incorporate fixed anchors which must be replaced
if
they
cause improper clearances.
6
0
Install
adjuster plug in adjuster slot in backing
plate.
7.
Install
wheels and tighten nuts to 75 lb. ft.
torque
(Pontiac), 70 lb. ft. torque (Tempest and
Firebird).
8.
Drive
car alternately
forward
and
backward,
moderately
applying brakes in each direction to
check
for proper operation.
DISASSEMBLY
1
0
Raise
all four wheels off ground.
2.
Remove front wheels, front hub and
drum
as-
semblies,
rear
wheels and
rear
drums.
NOTE:
It may be necessary to back off the brake
shoe adjustment before the brake drums can be
removed. To back off shoe adjustment insert a
small rod or screwdriver through the adjusting
screw
slot
in the backing
plate
and hold
automatic
adjuster lever
away
from adjusting screw
star
wheel and
rotate
adjusting screw upward
(Figs.
5-4
and 5-5).
3.
Remove the
primary
and secondary shoe
return
springs.
4. Remove the actuating
link
(Fig.
5-7).
5.
On
rear
brakes spread shoes slightly and re-
move the
parking
brake
lever strut and
spring,
then
disconnect the
parking
brake
cable from the operat-
ing
lever.
6. Remove the
brake
shoe hold-down springs, pins
and
washers, and the adjuster lever and
return
spring
(Fig. 5-7).
7.
Spread
shoes to
clear
wheel cylinder
links,
then
remove the
primary
and secondary shoes as an
assembly.
CA
UTION:
Extreme care must be taken to prevent
oil, grease or brake fluid from
getting
on linings.
Even
oily
fingerprints on linings may affect the
operation of brakes.
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