Pontiac tempest 1968 Service Manual page 204

5C-1
HEAVY DUTY POWER BRAKES
BENDiX TANDEM DIAPHRAGM TYPE
CONTENTS OF THIS SECTION
SUBJECT PAGE
Checks and Adjustments on Car 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
Parts—Remove 5C-1
Valve Rod and Related Parts 5C-2
Power Section 5C-3
Rear Shell Vacuum Seal 5C-4
Diaphragms, Plates and Plunger. 5C-4
Check Valve and Grommet 5C-5
Master Cylinder—Disassemble 5C-5
SUBJECT PAGE
Cleaning 5C-5
Inspection
5C-5
Assembly 5C-5
Master Cylinder , 5C-5
Vacuum Seal 5C-6
Plates Plunger and Diaphragm 5C-6
Diaphragms and Plates in Shells . . . . . . . 5C-6
Vacuum Check Valve
Reaction Disc and Push Rod 5C-7
Valve Rod and Related Parts 5C-7
Dust Guard and Master Cylinder . . . . . . 5C-7
Push Rod Adjustment . . . . . . . . . . . . 5C-7
Power Brake Assembly—Install 5C-8
Special Tools 5C-8
Torque Specifications 5C-8
CHECKS AND ADJUSTMENTS ON CAR
1. Check for free operation of brake pedal. If
binding exists, check all pivot points for binding and
lubricate as required.
2. Check stop light switch for proper setting and
operation.
3. Check fluid level in hydraulic cylinder reser­
voir. Fluid level should be as shown in Section 5.
4. Check vacuum line and connections at carbu­
retor and vacuum check valve for possible vacuum
leaks.
5. Check engine for good stall-free idle and cor­
rect as required.
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-REMOVE
1. Disconnect vacuum hose from vacuum cylinder
assembly. Cover openings to prevent entry of dust,
dirt, etc.
2. Disconnect pipe from master cylinder hydraulic
port and cover opening in master cylinder and end of
pipe to prevent entry of dust, dirt, etc.
3. Remove clevis pin from brake pedal inside the
car.
4. Remove nuts and lock washers from power
cylinder studs and remove power cylinder.
5. Clean exterior of power brake assembly and
drain reservoir of hydraulic fluid.
DISASSEMBLY
MASTER CYLINDER AND EXTERNAL PARTS-
REMOVE
Scribe across master cylinder flange and front
shell of power section. Remove the two master
cylinder attaching nuts and lockwashers and lift off
master cylinder. Remove clevis from valve rod. Wet