Pontiac tempest 1968 Service Manual page 190

D E L C O - M O R A I N E P O W E R B R A K E
5A-7
TEMPEST
A N D FIREBIRD
*1 3
F i g . 5 A - 8 Exploded View o f Power Piston
1. Filter
2 . Push Rod
Limiter
Washer
3 . Floating V a l v e
Retainer
4 . V a l v e O p e r a t i n g
Rod
5. Floating Control
V a l v e
6. Air V a l v e
7. O - R i n g Seal
8. Diaphragm
9. Support Plate
1 0. Power Piston
1 1 . Retaining Ring
12. Reaction Spring Seat
13„ Reaction Bumper
14. Reaction Spring
15. Reaction Levers
16. Reaction Plate
17. Reaction Retainer
18. O - R i n g Seal
19. Vacuum C y l i n d e r
Push Rod
20. Lock Ring
21. C l e v i s
2 2 . C l e v i s N u t
23. Retaining Ring
24. Silencer
12. Holding support plate on bare metal, with lock­
ing tangs down, place support plate and diaphragm
assembly down over tube of power piston. Flange of
diaphragm will fit into groove on power piston.
13. Press down and rotate support plate clockwise
until lugs on power piston come against stops on
support plate.
14. Invert assembly and place in padded vise with
power piston tube end down and insert snap ring on
air valve using Truarc Pliers.
15. Place air valve spring retainer to seat on snap
ring and assemble reaction bumper into groove in
end of air valve.
16. Position reaction spring, large end down, on
spring retainer.
17. Position three reaction levers in slots on
power piston. Narrow ends will rest on reaction
spring.
18. Position reaction plate, with numbered side up,
on top of reaction levers and press down on plate
until large ends of reaction levers pop up and plate
rests flat on levers. Be sure that reaction plate is
centered.
19. Place small end of piston rod in hole in center
of reaction plate and line up ears on reaction re­
tainer with notches in power piston and push reaction
retainer down until ears seat in notches.