Pontiac Parking Brake System - Pontiac Grand Prix Service Manual

STANDARD BRAKES 5-7
CENTER CROSS MEMBER
VlEW E
VlEW D
F R O N T CABLE
CENTER CABLE (TYP. BOTH SIDES)
1
Fig. 5-9 Pontiac Parking Brake System
a. Inspect teeth on star wheel for wear.
b. Remove all foreign material from adjusting screw
and nut. Nut must rotate freely on threads.
5. Check adjuster lever to be certain it is not bent or
distorted, and that foot is not worn excessively.
Replace if necessary.
6. Check the ovemde pivot for wear or deformed parts.
7. Inspect brake drums for scoring. Road dirt fre-
quently cuts grooves in drums which do not impair
operation of brakes unless grooving is extremely
severe. When drums are badly scored (deeper than
.020") inspect brake shoe linings carefully for imbed-
ded foreign material. Replace or recondition only if
drums are badly scored.
NOTE:
If
drums are not scored deeper than .02Q' or do
not exceed maximum out-ofround tolerances (see
Specijkations), they should be cross-sanded, rather than
turned. Cross-sanding of drums may be accomplished
using a 90 degree offset 1/4" or 38" drill adapter, with
a I" sanding disc (No. 40 grit). The drums should show
a uniform finish after cross-sanding. This method of
refinishing drums will allow the proper drum surface
necessary to burnish new linings.
CAUTION: Removing material from brake drum
reduces the strength of the drum and also its ability to
transfer heat. Never remove more than is absolutely
necessary and in no case remove more than 0.030'
(increasing diameter by 0.060"). After a drum is turned,
be sure it is free of all metal particles. Whenever
a
drum
is turned, the drum on the opposite side should also be
turned. If the drum diameter is less than 0.030" oversize
(11.03Q') after refinishing, standard linings may be
installed. If drum diameter is 11.030-11.060': oversize
linings must be installed.
NOTE: If new linings are installed on one wheel, they
must also be installed on the opposite side of the car.
8. Check brake drum for build-up of rust and dirt at
outer circumference. Remove build-up so that drums
can be installed over pre-adjusted linings.
9. Inspect front wheel bearings and oil seals and
replace as necessary.
10. Inspect hoses and hydraulic lines for wear, kinks,
or damage and replace as necessary.
.11. Clean exposed portions of parking brake cables
and examine for broken strands.
12. Check to make sure all bolts and nuts securing
backing plate to suspension are tightened to 100 Ib. ft.
torque at upper plate to knuckle bolt, 75 Ib. ft. torqve
at lower bolt and 35 Ib. ft. torque on all rear plate to
axle
flange bolts.