Heavy Duty Power Brakes; Bendix Tandem Diaphragm Type; Master Cylinder And External Parts; Valve Rod, Retainers, Filter And Poppet - Pontiac Grand Prix Service Manual

HEAVY DUTY POWER BRAKES
BENDIX TANDEM DIAPHRAGM TYPE
CONTENTS OF THIS SECTION
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SUBJECT PAGE SUBJECT PAGE
. . . . . . .
Checks and Adjustments on C a r .
5C-1
. . . . . . . . . . . . . . . . .
Minor Repairs. 5C- 1
. . . . . . . . . . . . . . .
Bleeding Brakes 5C- 1
. . . . . . . . . . . . . .
Stop Lamp Switch. 5C- 1
. . . . . . . . . . . . . . . . .
Major Repairs. 5C- 1
Power Brake and Master Cylinder
. . . . . . . . . . . .
Assembly
-
Remove 5C- 1
. . . . . . . . . . . . . . . . . .
Disassembly. 5C- 1
Master Cylinder and External P a r t s
-
. . . . . . . . . . . . . . . . . . .
Remove 5C-1
. . . . . . . .
Valve Rod and Related P a r t s
5C-2
. . . . . . . . . . . . . . . .
Power Section. 5C-2
. . . . . . . . . . .
Rear Shell Vacuum Seal 5C-3
. . . . . .
Diaphragms, Plates and Plunger 5C-3
Master Cylinder
-
Disassemble.
. . . . . .
5C-4
. . . . . . . . . . . . . . . . . . . .
Cleaning 5C-4
. . . . . . . . . . . . . . . . . . .
Lnspection 5C -4
. . . . . . . . . . . . . . . . . . . .
Assembly 5C-4
. . . . . . . . . . . . . . .
Master Cylinder. 5C-4
. . . . . . . . . . . . . . . . .
Vacuum Seal. 5C
-
5
. . . . . .
Plates, Plunger and Diaphragms. 5C-5
. . . . . .
Diaphragms and Plates in Shells
5C-6
Reaction Disc, Push Rod and Vacuum
. . . . . . . . . . .
Check Valve Grommet 5C-7
. . . . . . . .
Valve Rod and Related P a r t s
5C-7
. . . .
Push Rod
Boot and Master Cylinder.
5C-8
. . . . . . . . . . . . .
Push
Rod
Adjustment.
5C-8
Power Brake Assembly
-
Install
. . . . . .
s
5C-8
Torque Specifications.
. . . . . . . . . . . . .
5G :8
. . . . . . . . . . . . . . . . . .
Special Tools $C-8
CHECKS AND ADJUSTMENTS ON CAR
2. Disconnect pipes from master cylinder hydraulic
ports and cover openings in master cylinder and ends
1. Check for free operation of brake pedal. If binding
pipes Prevent entry dust, dirt, etc.
exists, check all pivot points for binding and lubricate
as required.
3. Remove clevis pin retainer from brake pedal inside
the car.
2. Check stop light switch for proper setting and
operation.
4. Remove nuts from power cylinder studs and remove
power cylinder.
3. Check fluid level in hydraulic cylinder reservoirs.
Fluid level should be as shown in Section 5.
5. Clean exterior of power brake assembly and drain
reservoirs of hydraulic fluid.
4. Check vacuum hose, check valve grommet and
carburetor vacuum fitting for possible air leaks.
DISASSEMBLY
5. Check engine for good stall-free idle and correct as
required.
MASTER CYLINDER AND EXTERNAL PARTS
-
REMOVE
MINOR REPAIRS
BLEEDING BRAKES
Brakes should be bled in the same manner as standard
brakes.
STOP LAMP SWITCH
See Section 5 for service.
MAJOR REPAIRS
POWER BRAKE AND MASTER CYLINDER
ASSEMBLY
-
REMOVE
1. Remove vacuum check valve from front housing
and discard grommet.
1. Remove the two master cylinder attaching nuts and
lockwashers and remove master cylinder. Remove
hydraulic push rod by pulling it straight out of front
shell.
2. Carefully remove push rod boot and air filter from
valve rod.
VALVE ROD, RETAINERS, FILTER AND POPPET
PARTS -REMOVE (Fig. 5C-2)
1. Carefully remove stamped steel hub protector and
foam air filter from valve hub. USE CARE TO
AVOID DAMAGING PLASTIC HUB.
2. With valve rod in vertical position, squirt alcohol