Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 168 / 468

5-2
OVERHAUL MANUAL
PRIMA RY
DIAPHRAGM
REACTION
BUMPER RETAINER
S IL ENC ER i RING
AIR V A L V E
SPRING
PRIM ARY
SUPPORT
PLATE
O' RING
SEAL
P RIMA RY POWER
PISTON
FLOATING
CONTROL
VALVE
REACTION
PISTON
SECONDARY
POWER PISTON
FLOATING CONTROL
V A L V E RETAINER
REACTION
DISC
ILTER
PISTON
ROD
SECONDARY '
SUPPORT PLATE
SECONDARY
DIAPHRAGM
PISTON ROD
RETAINER
SECONDARY POWER
PISTON BEARING
HOUSING D IV ID ER
Fig. 5 -1 A ~ P o w e r P iston G rou p
will tem porarily lock the prim ary support plate to the
prim ary power piston and perm it continued counter­
clockwise rotation to unscrew the prim ary power piston
from the secondary power piston (fig. 5-5A).
4. Remove the housing divider from the secondary
power piston. Remove the secondary power piston bearing
from the housing divider.
5. The secondary power piston should still be positioned
on Tool J-23101. Fold back secondary diaphragm from O.D.
of secondary support plate. G rip the edges of the support
plate and rotate clockwise to unlock the secondary support
Fig. 5 -2 A -U n lo c k in g Front and Rear Housings
plate from the secondary power piston (fig. 5-6A).
6. Remove the secondary diaphragm from the secondary
support plate.
7. Remove the reaction piston and reaction disc from the
center o f the secondary power piston by pushing down on the
end of the reaction piston with a small object, such as a pencil,
wooden dowel or metal rod (fig. 5-7A).
8. Remove the air valve spring from the end of the air
valve (if it didn’t come off during disassembly of the power
piston).
9. M ount Tool J-23101 in a vise (with small diam eter
end up). Position the prim ary pow er piston so that the two
radial slots in the piston fit over the ears (tangs) of the tool
(fig. 5-8A).
10. Fold back prim ary diaphragm from the support
plate. G rip the edge of the support plate and rotate in a
counterclockwise direction to unlock the primary support
plate from the prim ary power piston (fig. 5-9A).
11. Remove the prim ary diaphragm from the prim ary
support plate.
12. Remove the air filter from the tubular section of the
prim ary power piston.
13. Remove the power head silencer from the neck of
the power piston tube.
14. Remove the rubber reaction bum per from the end
of the air valve.
15. Using Snap Ring Pliers J-4880, remove the retaining
ring from the air valve (fig. 5-10A).
16. Remove the air valve-push rod assembly from the
tube end of the prim ary power piston. The following removal
method is recommended:
a. Place the prim ary power piston in an arbor press, and
j- 2 2 8 0 5