Subaru XT 1988 Service Manual page 995

4-4
BRAKES
TROUBLESHOOTING
Entire Brake System
Trouble and possible cause
1. Insufficient braking
(1 )
Oil leakage from the hydraulic mechanism
(2) Entry of air into the hydraulic mechanism
(3)
Excessively wide shoe clearance
(4) Wear, deteriorated surface material, adhering
water or oil on the lining
(5)
Improper operation of master cylinder, wheel
cylinder, disc caliper, brake booster or check valve
2.
Unstable or uneven braking
(1) Oil on the lining, drum
(2)
Oil on the pad, rotor
(3)
Drum or rotor eccentricity
(4)
Worn brake drum, or damage to the drum caused
by sand
(5) Improper lining or pad contact, deteriorated surface
material, improper inferior material, or wear
(6) Deformed back plate
(7) Loosened back plate or the support installing bolts
(8) Loosened rear wheel bearing
(9) Trouble in the hydraulic system
(10)
Uneven effect of the hand brake
3.
Excessive pedal stroke
(1) Entry of air into the hydraulic mechanism
(2) Excessive play in the master cylinder push rod
(3)
Oil leakage from the hydraulic mechanism
(4) Improperly adjusted shoe clearance
(5)
Improper lining contact or worn lining
(6) Improper pad contact or worn pad
48
Remedy
Repair or replace (cup, piston seal, piston boot, master
cylinder piston kit, pipe or hose).
Bleed the air.
Adjust the clearance.
Replace, grind or clean.
Correct or replace.
Eliminate cause of oil leakage, clean, or replace.
Eliminate cause of oil leakage, clean, or replace.
Correct or replace the drum or rotor.
Correct by grinding, or replace.
Correct by grinding, or replace.
Correct or replace.
Retighten.
Retighten to normal tightening torque or replace.
Replace the cylinder, brake pipe or hose.
Check,. adjust, or replace the front brake and cable system.
Bleed the air.
Adjust.
Repair or replace (cup, piston seal, piston boot, master
cylinder piston kit, pipe or hose).
Adjust.
Correct or replace.
Correct or replace.