Assembly Of Reaction Disc, Push Rod And Vacuum Check Valve Grommet; Assembly Of Valve Rod, Air Filter, Retainer And Poppet Parts; Gaging Push Rod Length; Push Rod Gage - Pontiac Grand Prix Service Manual

HEAVY DUTY POWER BRAKES
5C -7
3. When assembling diaphragm and plate assembly in
rear shell, the rear diaphragm and center plate lugs
must be aligned between lances on rear shell.
4. Carefully guide valve housing sleeve through bearing
seal in rear shell, keeping diaphragm and plates in correct
alignment. Work outer rim of front diaphragm into rear
shell so that outer rim of front diaphragm is under each
of retaining lances on rear shell.
5. Secure power section front shell to tool J 8433 and J
6407-02 as in Fig. 5C-3.
6. Assemble rear shell to spanner wrenches J 9504 as
shown in Fig. 5C-3.
7. Secure front shell to arbor press.
8. Place power diaphragm return spring in front shell,
small coil first.
9. Position rear shell, spanner wrenches, and tool
J
22553-1 over spring so that scribe marks will be
aligned when the shells are locked together.
10. Slowly compress assembly keeping in a parallel
plane.
CAUTION: Do not compress assembly to the point of
damaging power unit.
11. When front and rear shells are mated, rotate
spanner wrenches until the two shells are locked
together. Bend locking tangs "in" on rear shell, if so
equipped.
12. Release pressure from assembly and remove all
tools from front and rear shells.
ASSEMBLY OF REACTION DISC, PUSH ROD AND
VACUUM CHECK VALVE GROMMET (Fig. SC-1).
1. Apply power brake lubricant liberally to entire
surface of rubber reaction disc and to piston end of
hydraulic push rod.
2. Place reaction disc on piston end of push rod.
CAUTION: Under NO condition should lubricant be
allowed to get on adjustment screw or threads.
3. Insert push rod with reaction disc on piston end into
cavity in front plate hub. Twist push rod to make
certain reaction disc is seated in front plate hub and to
eliminate air bubbles between hub, disc and push rod
piston.
4.
Assemble seal, support plate side first, over adjust-
ment screw end of push rod. Press seal into recess in
front shell until seal bottoms against shell.
Fig. 5C-9 Gaging Push
Rod Length
5. Wet new vacuum check valve grommet in alcohol
and press grommet into front shell, beveled side first.
Make certain grommet is seated in shell.
ASSEMBLY OF VALVE ROD, AIR FILTER, RETA~NER
AND POPPET PARTS (FIG. 5C-2)
1. Wet poppet valve in alcohol and assemble poppet in
valve housing, small diameter end of poppet fmt; wet
poppet retainer in alcohol .and assemble in housing
with flange out. Press in against retainer to make
certain shoulder on retainer is positioned inside
poppet.
2. Assemble retainer, air filter and valve return spring
over ball end of valve rod as shown
.
3. Wet rubber grommet in valve plunger inside valve
hub and ball end of valve rod with alcohol.
4. Guide spring, filters and silencers into hub and
assemble ball end of valve rod in valve plunger.
5. Tap end of valve rod with soft hammer to lock ball
end of rod in valve plunger grommet.
6. Press foam air filter into position inside hub and
H I S OR MI6
U.88. BAUQE
T
SHEET STEEL
-
-
Fig. 5C-10
Push
Rod Gage