Wheel Cylinder; Master Cylinder Usage Chart - Pontiac Grand Prix Service Manual

5-12 1969 PONTIAC SERVICE MANUAL
BOOT
BLEEDER SCREW
Fig. 5-13 Wheel Cylinder
-
Exploded View
down, push front piston into bore, seating spring
against closed end of bore.
8. Place master cylinder in vise with open end of bore
up. Coat primary and secondary seal on rear piston
with clean brake fluid. Push rear piston assembly,
spring end first, into bore of master cylinder. Hold
piston down and snap lock ring into position in small
groove in I.D. of bore.
9. Continue to hold rear piston down, which will move
front piston forward far enough to clear stop screw
hole located in bottom of front fluid reservoir. Position
stop screw in its hole and tighten to a torque of 33 lb.
in.
10. Install a new reservoir diaphragm in reservoir
cover, if needed. Install cover on master cylinder.
Beaded side faces casting to insure positive sealing.
Push bail wires into position to hold reservoir cover.
11. Assemble push rod through push rod retainer, if
disassembled.
12. Push retainer over end of master cylinder. Assem-
ble new boot over push rod and press it down over
push rod retainer.
REPLACE
1. Mount and secure master cylinder to dash, tighten
fasteners to 25 lb. ft. torque. The flange on the push
rod retainer and flange on boot will be held between
'
the dash and master cylinder.
2. Connect push rod to brake pedal and attach brake
lines to appropriate bosses on master cylinder. 'Outlet
boss thread sizes and brake line fittings for front and
rear are different, to assure that correct connections are
made, providing original brake lines have not been
changed.
3. Fill and bleed master cylinder as though it were two
separate units. See section on bleeding brakes. After
bleeding, fill reservoirs with brake fluid to within 1 /4"
of top of reservoir.
"Number stamped on side of piston.
Fig. 5-14 Master Cylinder Usage Chart
A
MASTER CYLINDER USAGE CHART
USAGE
DELCO-MORAINE
Pontiac-Power Drum & Manual Drum
Grand Prix & Tempest-Power Drum
& Manual Drum
Firebird-Power Drum
&
Manual Drum
Grand Prix & Tempest-Power Disc
Firebird-Power Disc
Pontiac-Power Disc
BENDIX
Pontiac-Power Drum
Pontiac-Power Drum (Heavy Duty)
Pontiac-Power Disc
:
SECONDARY
PISTON IDENT.
No Rings or Grooves
1 Ring or 1 Groove
1 Ring or 1 Groove
6 Rings or 6 Grooves
3 Rings or 3 Grooves
2 Rings or 2 Grooves
-
-
-
PRIMARY*
PISTON IDENT.
-
-
-
-
-
-
716,
6213
794
MASTER CYL.
IDENT. STAMP
HU
CT
CT
EA
GA
RA
HU
PP
YM
1
BORE
SIZE
1"
1'
1'
1%"
1%'
1 lh"
1"
1'
11h8