Pontiac FIREBIRD 1972 Service Manual page 507

5E- 12 1972 PONTIAC SERVICE MANUAL
2. Position the boot in the caliper counterbore and seat
with tool J 22904 (Fig. 5E-16). Check the boot instal-
lation to make sure that the retaining ring molded
into the boot is not bent and that the boot is installed
fully
--
below the caliper face
--
and evenly all around
(Fig. 5E-9). Otherwise dirt or moisture may enter the
bore and cause damage or corrosion.
INSTALL
Installation of the caliper and mounting parts (rubber
bushings, sleeves, shoe and lining assemblies, and bolts) is
the same as for lining replacement except for the follow-
ing:
1. Check the hose for worn spots, cracks or other signs
of deterioration. Discard'the hose, if damaged, and
replace with a new part. with the open slot under the
mounting bolt and pushing in on the pin in the end
of the valve. The pressure needed to push the plunger
Bolt the brake hose to the caliper using a new copper
-
-
gasket on each side of the brass fitting.
NOTE: Make certain hose is not twisted or
kinked. The hose used on Pontiac has a special
brass fitting with raised comers; this surface
must face bolt head to properly orient hose.
Fig. 5 E - 1 6 Seating Boot
CAUTION: Make certain that the skirt of the
metal fitting which attaches to the caliper is
installed BETWEEN the ears on the caliper
boss as shown in Fig 5- 19.
2. After overhaul
--
or any time that the brake hose or
line is disconnected
--
the calipers must be bled. Use
either the manual or pressure tank method. (See
-
Bleeding Disc Brakes.)
BLEEDING DISC BRAKES
If the caliper was removed for overhaul, or if the brake
hose or steel line was disconnected for any other reason,
it will be necessary to bleed all air from the calipers and
connecting lines. The bleeding operation for disc brakes is
the same as for drum brakes. The only exception is that
the metering or brake combination valve must be held
open. This is done by depressing and holding in the
plunger in the end of the valve with Tool J 23709. This can
be accomplished by installing tool J 23709 with the open
slot under the mounting bolt and pushing in on the pin in
the end of the valve. The pressure needed to push the
plunger in should never exceed 25 lbs. Brakes should be
bled in this order: Master cylinder, right rear, left rear,
right front, left front.
BRAKE ROTOR
REMOVE
1. Raise car and remove front wheels.
2. Remove caliper assembly and rest on front suspen-
sion, as described in Shoe and Lining Replacement:
Caliper
-
Remove.
3. Remove spindle nut and hub and rotor assembly.
REPLACE (Fig. 5E-17 and 5E-18)
1. Install new bearings or seal as necessary.
2. Install hub and rotor assembly on spindle. See Sec-
tion 3 for proper Wheel Bearing Adjustment Proce-
dure.
3. Install caliper assembly and torque mounting bolts to
35 lb. ft. (See Caliper
-
Install).
CAUTION: See caution on Page I o f this section
regarding fasteners referred to in Step 4 be10 w.
4. Install wheel and tire assemblies, and torque lug nuts
to 75 lb. ft. (B Series), and 70 lb. ft. (A, F and G
Series).