Delco Disc Brake Shoe And Lining - Chevrolet LIGHT DUTY TRUCK (SERIES 10-35) Service Manual

the end of the master cylinder bore. Then release the piston
and remove the primary and secondary piston assemblies
from the cylinder bore. It may be necessary to plug the front
outlet port and to apply low air pressure to the front
compensating valve port to remove the secondary piston
assembly.
Assembly
1. Lubricate the secondary piston assembly and the
master cylinder bore with clean brake fluid.
2. Assemble the secondary spring (shorter of the two
springs) in the open end of the secondary piston actuator,
and assemble the piston return spring (longer spring) on the
projection at the rear of the secondary piston.
3. Insert the secondary piston assembly, actuator end
first, into the master cylinder bore, and press assembly to
the bottom of the bore.
4. Lubricate the primary piston assembly with clean
brake fluid. Insert the primary piston assembly, actuator
end first, into the bore.
5. Place the snap ring over a smooth round ended tool
and depress the pistons in the bore.
. Assemble the retaining ring in the groove in the
6
cylinder bore.
C O V E R
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R E S E R V O I R
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Fig. 5 -1 6 -B e n d ix M in i-M aster C ylin d e r-E xp lo d e d V ie w
V A L V E S E A L
P O P P E T
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S N A P RI N G
7. Assemble the compensating valve seals and the small
"O" ring seal in the recesses on the bottom of the reservoir.
Be sure that all seals are fully seated.
. While holding the pistons depressed, assemble the
8
compensating valve springs and the compensating valve
poppets in the compensating valve ports.
9. Holding the pistons compressed, position the
reservoir on the master cylinder body and secure with the
four mounting bolts. Tighten the bolts to 12-15 ft. lbs.

DELCO DISC BRAKE SHOE AND LINING

Lining Inspection
Inspect the brake linings every 6000 miles and anytime
that the wheels are removed (tire rotation, etc.) Check both
ends of the outer shoe by looking in at each end of the caliper
(see figure 5-18). Check the lining thickness on the inner
shoe by looking down through the inspection hole in the top
of the caliper housing. Whenever the lining is worn to the
approximate thickness of the shoe, the shoe and lining
should be removed. After removal, measure the lining
thickness. The shoe and lining should be replaced at any
time when the lining is worn to within 1/32 inch of a rivet
or 1/32 inch of the shoe at any point.
All front disc brakes have a wear indicator that makes
BRAKES 5-27
S P R I N G
P I S T O N
LIGHT TR U CK SER V IC E MANUAL