Disc Brake Assembly - Pontiac Grand Prix Service Manual

5E-2 1969 PONTIAC SERVICE MANUAL
FLUID
IWBOARO SHOE OUTBOARD SHOE
Fig.
5E-1
Disc
Brake
Assembly
~
If the vehicle has a brake problem and diagnosis i
points to the rotor, it should be inspected and checked
,
for runout at this time (See Rotor Service).
1
CALIPER INSTALL
1. Using a high quality silicon lubricant, lubricate the
new sleeves on all surfaces. Lubricate the new rubber
bushings, bushing grooves and the small ends of
mounting bolts (Fig. 5E-7). Install rubber bushings in
all four caliper ears.
CAUTION: It is essential that new sleeves and rubber
bushings be used and that lubrication instructions be
followed in order to insure the proper functioning of the
sliding caliper design.
2. Use hand pressure to install the sleeves. Position the
sleeves so that the end toward the shoe and lining
assemblies is flush with the machined surface of the
ear.
3. Position the inboard shoe and lining assembly in the
caliper so that the top edge of the shoe contacts the
caliper bridge. Push shoe toward piston making sure
top and bottom ears of spring enter piston simulta-
neously.
4. Position the outboard shoe in the caliper, with the
ears at the top of the shoe over the caliper ears and the
tab at the bottom of the shoe engaged in the caliper
cut-out (Fig. 5E-lo).
5. With both shoes installed, position the caliper so it
w i l l enter the mounting bracket without binding. Do
not force caliper if it becomes cocked. Allow the
bottom edge of the outboard lining to rest on the outer
edge of the rotor and make sure that there is no
clearance between the tab at the bottom of the
outboard shoe and the caliper abutment. Clamp the
outboard shoe to the caliper with moderate pressure
using a 1/4" thick metal bar to bridge the caliper
cut-out (Fig. 5E-11). Use a clean C clamp to avoid
contamination of the brake lining and do not use
excessive force which may deform the lining face.
Using vise-grip pliers, clinch both upper ears of the
outboard shoe. Locate the pliers 1/8 to 1/4 inch from
'
the outer edge of the shoe ear (Fig. 5E-11). After
,
clinching, the tangential and radial clearance between
the caliper and the shoe ears should not exceed 0.005
inch in either direction. Re-adjust the pliers and repeat
the clinching procedure if necessary.
6. After clinching, remove the C damp and position
the caliper over the rotor, lining up the holes in the
caliper ears with the holes in the mounting bracket.
Fig.
5E-2
Lining Inspection