Pontiac FIREBIRD 1972 Service Manual page 408

BRAKES
-
GENERAL 5-5
Compensating port not cleared.
See also COMPENSATING PORT under
ALL BRAKES DRAG.
LIGHT PEDAL PRESSURE
-
BRAKES TOO SEVERE
CAUSE
Brake adjustment not correct.
Loose support assembly
steering knuckle.
Small amount of grease
on rear axle or front
or fluid on linings.
Charred linings or scored drums.
Improper linings.
Check pedal linkage, stop light switch adjustment.
REMEDY
Adjust brakes.
Adjust front wheel bearings and tighten front backing
plates. Tighten rear backing plates. Adjust brakes.
Correct cause and replace linings. See BRAKE
CAUTIONS.
Sand surfaces of linings and drums. Clean loose dust
from brake. In severe cases replace shoes. Warn
owner regarding abuse of brakes.
Remove all particles that have become
imbedded in surfaces of linings. Slightly scored
drums do not require replacing or turning.
Install factory specified linings.
BRAKE NOISES
SQUEAK IN BRAKE WITH CAR STATIONARY (SOME-
TIMES MISTAKEN FOR PEDAL SQUEAK)
CAUSE
Shoe pads on backing plates dry and rusty.
CREAK WHEN BRAKES ARE APPLIED AT LOW CAR
SPEED
CAUSE
Anchor pins dry.
SCRAPE IN BRAKES AS PEDAL IS APPLIED, CAR STA-
TIONARY
CAUSE
Hold-down nail heads dry.
PEDAL SQUEAK
CAUSE
Return spring or stop light switch rubbing pedal.
REMEDY
Pry shoes out with screwdriver-apply grease
sparingly to shoe pads with feeler stock.
REMEDY
Grease anchor pins where shoes bear.
REMEDY
Lubricate.
Although adjusting brakes temporarily changes
these noises, lubrication will remedy.
REMEDY
Lubricate.