Cadillac 60 Series 1963 Shop Manual page 184

BRAKES
8-19
2. Install silencer in dust guard and guide dust
guard over O.D. of power piston bearing seal.
3. Install vacuum check valve in opening in
front shell using new grommet if old one is
cracked or damaged.
4. Place new support plate seal in support plate
seal retainer so that flat surface of seal lies
against bottom of retainer, Fig. 8-23. Lubricate
grooves in I.D. of support plate seal with special
lubricant.
5. Place new gasket on O.D. of support plate
seal retainer and insert retainer into front shell
so that gasket is between flange on retainer and
surface of front shell, Fig. 8-22.
6. If previously removed, press reaction plate
over small, knurled end of master cylinder push
rod so that it lies against shoulder of push rod.
7. Insert master cylinder push rod through
support plate so that reaction plate lies against
support plate, Fig. 8-24.
8. Rest power piston in vise with long tube
down. DO NOT CLAMP.
9. Place floating control valve spring in center
of power piston.
10. Install floating valve diaphragm over flanged
hub of floating control valve. Flat surface of dia-
phragm should be on side opposite from rubber
face of control valve, Fig. 8-25.
11. Insert control valve diaphragm plate under
lip of valve diaphragm.
12. Place spring retainer down over hub of
floating control valve.
13. Spread thin film of special lubricant on
O.D. of valve diaphragm. Install floating control
valve and diaphragm assembly in power piston,
making sure floating valve spring seats on spring
retainer, Fig. 8-24.
NOTE: Make sure that rubber diaphragm
is not distorted as the assembly is pressed
into power piston.
14. Install two power piston O-rings in grooves
on O.D. of power piston insert.
15. Install piston insert in power piston, being
careful not to misposition O-rings.
16. Install air valve O-ring into groove in O.D.
of air valve.
17. Install air valve snubber over flanged end
of air valve.
Floating
Control
Valve
Diaphragm
Plate
Floating
Valve
Diaphragm
$ p r i n g
Retainer
I)
Fig. 8-25 Floating Control Valve Assembly Disassembled
18. Lubricate air valve O-ring with special lu-
bricant and install air valve, push rod first, into
power piston insert.
19. Install air valve spring into counterbore
end of air valve.
20. Position ears of reaction levers in molded
locations in power piston insert and rest small
ends of levers on air valve spring, Fig. 8-26.
21. Install unfolded diaphragm on support plate
with square lip of diaphragm over support plate
flange.
22. Install diaphragm support plate assembly
on power piston making certain square lip of dia-
phragm is correctly positioned between flange on
support plate and flange on edge of power piston,
Fig. 8-27.
Support
Plate
Reaction
P
'
a t e
/
Power
Piston
Diaphragm
Air Valve Spring
Fig. 8-26 Positioning Reaction Levers