Power Section Disassembly; Power Unit - Exploded View - Pontiac Grand Prix Service Manual

5C -2
1969
PONTIAC SERVICE MANUAL
REAR DIAPHRA
REAR DIAPHRAGM RETAl
BBER GROMMET
T VACUUM SEAL
DUST GUARD
IAPHRAOM RETURN SPRING
YDRAULIC PUSH ROD
EACTION DISC
RON1 DIAPHRAGM
CENTER PLATE
Fig. 5C-1 Power Unit
-
Exploded View
down rod
to
wet rubber grommet in valve plunger on
ball end of valve rod.
3. Reinstall hub protector. Position two small blocks of
w a d on either side of eye and clamp this assembly
securely in vise (see Fig.
5C-2
inset). Leave just enough
space between steel retainer on plastic valve hub and
side of vise jaw
to
insert two medium-sized open end
wrenches. Use wrench nearest vise as a pry
to
force the
valve plunger grommet (and power section) off the
ball end of the valve rod.
POWER SECTION DISASSEMBLY (Fig. 5C-5)
1. Assemble special tool combination as shown in Fig.
5C-3.
2.
Place assembly in arbor press (Fig.
5C-3A)
with rear
shell and spanner wrenches up. Secure tool J 8433 to
press
to
prevent tilting of front shell.
NOTE: On some modeb it will be necessary to pry open
the four tangs located at the seam, to bllow shell
separation.
CAUTION: f i n separating vdlve rod from plunger,
3. Cnmpress assembly sufficiently enough to allow
hoId power unit to prevent it fiom falling to floor. Use
rotation of
tooh J 9504.
care when prying with wrenches to avoid damaging
phrric vaive housing.
CAUTION: Do not compress assembly to the point of
damaging power unit.
4.
Remove valve rod from vise. Carefully remove hub
protector, valve retum spring, poppet retainer and
4.
Scribe a mark across front and rear shell
to
facilitate
PoPPet-
assembly.