Ford Mercury Colony 1968 Shop Manual page 38

2-30 GROUP 2 - Brakes
Snap Ring Pliers
PUSH ROD (NOT
USED WITH
BRAKE BOOSTERS)
1477-B
FIG. 27 — Removing Snap Ring—
Typical
FIBER
BLOCK
CAI I
D
LR
PISTON
H1574-A
FIG. 29 — Removing Piston
From Caliper
OUTER SHOE
RETAINING CLIPS
2066
INNER BRAKE
SHOE 2019 OUTER BRAKE
SHOE 2018
STABILIZERS
2B295
H 1573-A
FIG. 28 — Caliper Assembly—Disassembled
springs, then remove the brake shoe.
6. Apply air pressure to the fluid
port in the caliper as shown in Fig.
29 to remove the piston. Place a cloth
over the piston before applying air
pressure to prevent damage to the
piston. If the piston is seized and
cannot be forced from the caliper,
tap lightly around the piston while
applying air pressure. Care should
be taken because the piston can develop
considerable force due to pressure
build-up.
7. Remove the dust boot from the
caliper assembly.
8. Remove the rubber piston seal
from the cylinder and discard it.
CLEANING AND INSPECTION
Clean all metal parts with alcohol
or a suitable solvent. Use clean, dry,
compressed air to clean out and dry
the grooves and passage ways. Be
sure that the caliper bore and com-
ponent parts are completely free of
any foreign material.
Check the cylinder bore and pis-
ton for damage or excessive wear.
Replace the piston if it is pitted,
scored, or the chrome plating is worn
off.
ASSEMBLY
1. Apply a film of clean brake
fluid to the new caliper piston seal
and install it in the cylinder bore.
Be sure the seal does not become twist-
ed and that it is seated fully in the
groove.
2. Install a new dust boot by
setting the flange squarely in the
outer groove of the caliper bore.
3. Coat the piston with the speci-
fied fluid and install the piston in
the cylinder bore. Spread the dust
boot over the piston as it is instal-
led. Seat the dust boot in the piston
groove.
4. Position the inner brake shoe
so that the ears of the shoe rests
on the top of the anchor plate bosses
and beneath the hold-down springs.
5. Install new caliper guide pin
insulators in the anchor plate.
6. Position the caliper on the
anchor plate.
7. Apply the specified fluid to
the caliper guide pins and install
them loosely in the anchor plate.
Be sure the guide pins are free of
oil, grease or dirt.
8. Install the caliper on the
spindle as outlined under Disc Brake
Caliper Assembly.