Pontiac FIREBIRD 1972 Service Manual page 420

BRAKES
-
GENERAL
5-17
NOTE: Front wheel bearings must be aadjosted
as outlined in Section 3 of this manual. At com-
pletion of adjustment, drum must rotate with-
out any drag. Replace any parts that prevent
free rotation.
Proper clearance can also be obtained by lengthening the
star wheel adjuster screw until a heavy drag is felt on the
outer diameter of the brake drum (with wheel removed).
Back-off adjusting screw one complete turn (B Series
-
30
notches; A, F and G Series
-
26 notches).
4. Check to make certain parking brake mechanism and
linkage are properly adjusted.
5. Check fluid level in master cylinder. The level should
be within 1/4 inch from top of reservoir (Fig. 5-1 1).
should be conveyed to owner along with in-
structions to follow proper burnishing proce-
dure as outlined in Owner's Manual.
DISASSEMBLY
CAUTION: Extreme care must be taken to pre-
vent oil, grease or brake fluid from getting on
linings. Even oily fingerprints on linings may
affect the operation of brakes.
1. Raise all four wheels off ground.
CAUTION: Use care not to crush exhaust sys-
tem %ck-underMpipe on B Series station wag-
ons when using an axle engaging hoist.
6. Drive car alternately forward and backward, lightly 2. Remove front wheels, front hub and drum assem-
applying brakes in each direction to check for proper blies, rear wheels and rear drums.
operation.
NOTE: It may be necessary to back o f f the
CAUTION: New linings must beprotectedfrom brake shoe adjostment before the brake drums
severe use for several hundred miles. This can be removed. To back o f f shoe adjostment
SECONDARY SHOE RETURN ACTUATING GUIDE RETURN PRIMARY SHOE
AND LINING SPRING LINK
/
SPRING A N D L I N I N G
BRAKE
/
/
LEVER
/ ' \
RETURN SOCKET THRUST ADJUSTING
\
NUT
SPRING WASHER SCREW
Fig.
5 - 1 5
Exploded View
-
Typical Right Rear Self-Adjusting Brake Assembly