Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 184 / 468

5-18 OVERHAUL MANUAL
I N S T A L L E R
J - 2 1 6 0 1
P O W E R
P I S T O N
Fig. 5 -1 3 C —In s ta llin g F lo a tin g C o n tro l V a lv e A s s e m b ly
the tube, by placing J-2 1601-01 Floating Control Valve
Retainer Installer on top of retainer and pushing down by
hand (fig. 5-13C).
11. After floating control valve is seated, position push
rod lim iter washer over push rod and down onto floating
control valve. A ir filter element can now be stretched over
end of push rod and pressed into power piston tube.
12. Assemble power piston diaphragm to diaphragm
support plate from side of support plate opposite locking
tangs. The raised flange of diaphragm is pressed through hole
in center of support plate. Be sure that edge of center hole
fits into groove in flange of diaphragm.
13. Pull diaphragm away from O.D. of support plate so
that support plate can be gripped with hands.
14. W ith power piston still positioned on holding tool
in vise, coat bead of diaphragm that contacts power piston
with Power Brake Lube (or equivalent).
15. Holding support plate by metal, with locking tangs
down, place support plate and diaphragm assembly over tube
of power piston. The flange of diaphragm will fit into groove
on power piston (fig. 5-10C).
16. Press down and rotate support plate clockwise, until
lugs on power piston come against stops on support plate (fig.
5-10C).
17. This assembly can now be turned over and placed,
tube down, in a tool, fabricated from a piece of wood, 2" x
4" x 8" long with a 1-3/8" hole in the center, clamped in a
vise.
18. W ith Snap Ring Pliers J-4880, assemble snap ring
into groove in air valve.
19. Place air valve spring retainer on snap ring.
Assemble reaction bum per into groove in end of air valve.
20. Position air valve return spring, large end down, on
spring retainer.
21. The three reaction levers are now placed into
position with ears on wide end in slots in power piston. The
Fig. 5-1 4 C --H o u sin g L o c k in g Tabs
narrow ends will rest on top of air valve return spring.
22. Position reaction plate (with numbered side up) on
top of reaction levers. Press down on plate until large ends
of reaction levers pop up so plate rests flat on levers. Be sure
reaction plate is centered.
23. M aster cylinder piston rod and reaction retainer
assembly is now assembled to the power piston.
24. W ith round end of piston rod up, and with reaction
retainer held tow ard top of piston rod, place small end of
piston rod in hole in center of reaction plate. Line up ears
on reaction retainer with notches in power piston and push
reaction retainer down until ears seat in notches.
25. M aintain pressure on reaction retainer and position
large lock ring down over m aster cylinder push rod.
26. There is a lug on the power piston which has a raised
divider in the center. One end of lock ring goes under lug and
on one side of divider.
27. As you work your way around power piston (either
way), the lock ring goes over ear of reaction retainer, under
a lug on power piston, and so forth, until other end of lock
ring is seated under lug with raised divider.
Be sure both ends of lock ring are securely under large
lug.
Rear Housing Group
1. Place a new power piston bearing in center of rear
housing so flange on center hole o f housing fits into groove
of power piston bearing. The large flange on power piston
bearing will be on stud side of housing.
2. Coat inside of power piston bearing with Delco Power
Brake Lube (or equivalent).