Pontiac FIREBIRD 1972 Service Manual page 471

TANDEM DIAPHRAGM POWER BRAKE-BENDIX 5C- 1 1
Fig. 5C-8 Tools for Disassembly of Power Brake Housing
5. Rotate spanner wrenches (J 9504) counterclockwise
Place rear shell on bench with studs up and drive out seal
to release position (to point where cutouts in front
with punch or screwdriver.
shell are in line with lances in rear shell).
6. Slowly release pressure on assembly.
DIAPHRAGMS, PLATES, RETAINER AND
7. Using fingers, remove diaphragm assembly from rear
PLUNGER
shell (Fig. 5C-11).
DISASSEMBLE (Fig. 5C-7)
REAR SHELL VACUUM SEAL
1. Wet rear diaphragm spring retainer with alcohol and
remove, using fingers only. Remove rear diaphragm
from rear plate.
REMOVE (Fig. 5C-1)
NOTE : Do NOT remove rear seal unless seal is
defictive.
Fig. 5C-9 Power Unit Special Tool Combination Fig. 5C-10 Power Unit Mounted in Press