5C-4
1968
PONTIAC
SERVICE
MANUAL
Fig.
5C-3A
Power Unit
Mounted
in
Press
and
spring with other hand and remove them from
bore of front plate hub.
Remove square ring seal from shoulder of plate.
NOTE:
Seal may
stick
to shoulder of
either
front
or rear
plate.
Using
small rod or screwdriver through center
bore of front plate, push out reaction disc. Loosen
front diaphragm from center plate and slide center
plate carefully off front plate hub.
CAUTION:
DO NOT
DAMAGE
OR
REMOVE
SEAL
FROM CENTER BORE
OF
CENTER
PLATE.
Remove diaphragm from front plate.
REMOVAL
OF
VACUUM
CHECK
VALVE
AND
GROMMET
(Fig. 5C-1)
NOTE:
Do NOT
remove
vacuum check
valve
un-
less
it is
defective.
To
remove vacuum check valve from front shell,
CDAMT Ol ATE
FRONT
DIAPHRAM
SQUARE
RING
S
REAR
PLATE
REAR
DIAPHRAGM
RETAINER
CENTER
PLATE
PLUNGER
SPRING
VALVE
PLUNGER
REAR
DIAPHRAGM
Fig.
5C-4
Diaphragms, Plates, Retainer
and
Plunger
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