Exploded View Of Pontiac Power Brake Unit - Pontiac Grand Prix Service Manual

DELCO-MORAINE POWER BRAKE 5A-5
MASTER CYLINDER
GROMMET
R E A R HOUSING
FELT SILENCER
Fig.
5A-5 Exploded View
o f Pontiac Power Brake Unit
component part of this assembly and cannot be
disdembled.
5. Wipe thin film of power brake lube on large O.D. of
floating control valve and on O-ring of air valve.
6. Press
air valve
-
push rod
-
floating control valve
assembly, air valve first, to its seat in tube of power
piston.
7. Place floating control valve retainer over push rod so
that flat side seats on floating control valve.
8. Start floating control valve and its retainer into
power piston hub. Use tool J 21601 to press floating
valve to seat in tube by placing tool on top of retainer
and pressing down.
9. Position push rod limiter washer over push rod to
floating control valve and install air filter element over
end of push rod and into power piston hub.
10. Install felt silencer and retaining clip in end of
power piston hub.
11. Assemble power piston diaphragm to support plate
from side of plate opposite locking tangs and press
raised flange of diaphragm through hole in center of
plate.
NOTE: Be sure that edge of center hole j t s into groove
in flange of diaphragm.
12. Pull diaphragm away from O.D. of support plate so
that the plate can be gripped with hands. Wipe power
brake lubricant on all surfaces of small bead of
diaphragm which contacts power piston.
13. Holding support plate on bare metal, with locking
tangs down, place support plate and diaphragm
assembly down over hub of power piston. Flange of
diaphragm will fit into groove on power piston.
14. Press down and rotate support plate clockwise until
lugs on power piston come against stops on support
plate.
15. Invert assembly and place in padded vise with
power piston hub end down and insert snap ring on air
valve using Truarc Pliers.