1. Readjust brakes. (See Minor Brake
Adjustment, Page 12.)
Replace linings or shoe and linings if necessary.
2. A large leak in the hydraulic system will
cause rapid loss of brake pedal
reserve and quickly drain
master cylinder fluid reservoir. A small leak will permit the pedal to go to the
toe-board slowly under pressure
and ultimately drain the reservoir.
To determine whether or not a
leak exists, install pedal jack and proceed as outlined in "Test for
Brake System Leaks," Page 10.
CAUTION:—Do not depress the pedal
when the brake drums are removed.
If the leak is found at the wheel
cylinders, remove the cylinder
and inspect the bore and piston cups. Replace the cylinder with new
one if the bore is not smooth and/or replace any damaged cups. If the
cylinders are gummed, clean with Declene.
Should the leak not be found in
lines, connections, wheel cylinders or hose, remove the master cylinder and inspect the bore and
piston cups, replacing the damaged parts. NOTE: A leak past the master cylinder primary piston cup
is not accompanied by lowering
of the fluid level in the reservoir.
3. Air trapped in the hydraulic system gives
the pedal a rubbery feeling
when depressed, causing
loss of pedal reserve and lack of brakes. Bleed the lines as instructed on Page
8.
4. Flush system with Declene and refill
with recommended Delco Brake
Fluid.