Pontiac FIREBIRD 1972 Service Manual page 422

BRAKES
-
GENERAL 5-19
(4 Spd. M.T.-M 20)
ROUTE CABLE OVER CROSSMEMBER
EXCEPT WITH M 40 & 6 CYL. ENGINES
(SEE VIEWS B)
(6 CY L. ENG.)
VIEW D
(Exc. 3539,3739)
BOTH SIDES
Fig. 5-17 A and
G
Series Parking Brake System
for the piston, but if an excessive amount of fluid is
6. Check adjuster lever to be certain it is not bent or
present, overhaul wheel cylinder. See Hydraulic Sys- distorted, and that foot is not worn excessively. Re-
tem. place if necessary.
4. Clean inner surfaces of brake backing plates and all
shoe contacting points. Sand shoe pads if necessary to
remove grooves.
5. Disassemble the adjusting screw assembly and in-
spect as follows:
a. Inspect teeth on star wheel for wear.
b. Remove all foreign material from adjusting screw
and nut. Nut must rotate freely on threads.
7. Check the override pivot for wear or deformed parts.
8. Inspect brake drums for scoring, cracks, deep
grooves and out-of-round. Road dirt frequently cuts
grooves in drums which does not impair operation of
'
brakes unless grooving is extremely severe. When
drums are badly scored (deeper than .02OW) inspect
brake shoe linings carefully for imbedded foreign
material. Replace or recondition only if drums are
badly scored.