Stop Light Switch; Brake Assembly Mechanism And Drums; Firebird Manual Brake System; Adjustment - Pontiac Grand Prix Service Manual

STANDARD BRAKES 5-3
TORQUE CLEVIS TO
SPECIFIED TORQUE
WlTH PEDAL FULLY DEPRESSED PUSH
- .
SWITCH FORWARD UNTIL IT STOPS
AGAINST BRACKET OR ARM. PULL PEDAL
REARWARD WlTH 15 TO 20 ZBS. FORCE
TO PROPERLY ADJUST SWITCH.
FLOOR PAN
L
-
Fig.
5-3
Firebird Manual Brake System
light should come on due to pressure difference 2. Connect wires to switch.
between front and rear systems. Approximately
150-250 psi differential is needed to operate brake
3. Lift brake pedal pad with 15-20 Ib. effort, brake
light.
pedal arm will automatically position switch correctly.
5. Close bleed screw. Release brake pedal. Refill rear
BRAKE ASSEMBLY MECHANISM AND
reservoir, if needed.
DRUMS
6. Repeat by opening one front brake bleed screw.
(Leave rear system secure). ADJUSTMENT
NOTE: Caution should be taken to prevent air from
entering hydraulic system during checks on switch.
The recommended checking interval should be 24
months or 24,000 miles; any time major brake work is
done or any time a customer complains of excessive
pedal travel.
STOP LIGHT SWITCH
REMOVE
1. Disconnect wires from switch.
2. Remove switch by pulling out of retainer.
REPLACE
A l l four brake assemblies incorporate a self-adjusting
mechanism to automatically adjust the brake shoes
when the car is operated in reverse.
NOTE: Normally, the self-adjusting feature of the brake
system provides the proper shoe-to-drum clearance, but
if
a need for adjustment exists, it is recommended that the
shoes be adjusted with the drums removed, using tool
number J 22364, not only to give a more accurate
clearance, but also to allow a thorough inspection of the
brake mechanism for possible defects which may have
caused the need for adjustment.
A 'manual adjustment is usually required when brake
shoes are replaced or the length of the star wheel
adjuster has been changed during some other service
operation.
1. Position stop light switch in retainer and push in to NOTE: This mechanism is designed so the brake
maximum distance. assembly cannot be over-adjusted.