Bleeding Disc Brakes; Brake Rotor; Installing Mounting Bolts; Removing Piston - Pontiac Grand Prix Service Manual

5E-6
1%9
PONTIAC SERVICE MANUAL
1. Check the hose for worn spots, cracks or other signs
of deterioration. Discard the hose, if damaged, and
replace with a new part. 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 corners; this surface must face bolt head to
properly orient hose.
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
The bleeding operation for disc brakes is the same as
for drum brakes. The only exception is that the
metering valve must be held open. This is done by
depressing and holding in the plunger in the end of
the valve with Tool J 22793.
BRAKE ROTOR
Fig. 5E-12 Installing Mounting Bolts
REMOVE
CALIPER
-
ASSEMBLE
1. Raise car and remove front wheels.
2. Remove caliper assembly and rest on front suspen-
1. Lubricate the seal groove in the caliper and the new
sion, as described in Caliper
-
Remove.
piston seal with clean brake fluid. Position the seal in
the caliper bore groove. Lubricate the piston with
3. Remove spindle nut and hub and rotor assembly.
clean brake fluid and assemble a new boot into the
groove in the piston so that the fold faces the open end
of the piston. Insert the piston into the caliper bore,
using care not to unseat the seal, and move piston until
it bottoms in the bore. This will require a force of 50 to
75 pounds.
2. Position the boot in the caliper counterbore and seat
with tool J 22904 (Fig. 5E-14). Check the boot
installation 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-6). Otherwise dirt or moisture may
enter the bore and cause damage or corrosion.
CALIPER
-
INSTALL
Installation of the caliper and mounting parts (rubber
bushings, sleeves, shoe and lining assemlbies, and
boks) is the same as for lining replacement except for
the following:
Fig. 5E-13 Removing Piston