Use the table below to
help you find the cause of the problem. The numbers indicate the priority
of the like cause of the problem. Check each part in order.
If necessary, replace
these parts.
Symptom
|
Suspect Area
|
Reference
|
Lower pedal or
spongy pedal
|
1. Brake system
(Fluid leaks) 2. Brake system (Air
in) 3. Piston seals (Worn or
damaged) 4. Rear brake shoe clearance(Out
of adjustment) 5. Master cylinder
(Inoperative)
|
repair air·bleed replace adjust replace
|
Brake
drag
|
1. Brake pedal
free play (Minimum) 2. Parking brake
lever travel (Out of adjustment) 3.
Parking brake wire (Sticking) 4. Rear
brake shoe clearance(Out of adjustment) 5. Pad or lining (Cracked or distorted) 6. Piston (Stuck) 7. Piston
(Frozen) 8. Anchor or Return spring
(Inoperative) 9. Booster system (Vacuum
leaks) 10. Master cylinder
(Inoperative)
|
adjust adjust repair adjust replace replace replace replace repair replace
|
Brake
pull
|
1. Piston
(Sticking) 2. Pad or lining
(Oily) 3. Piston (Frozen) 4. Disc (Scored) 5. Pad or
lining (Cracked or distorted)
|
replace replace replace replace replace
|
Hard pedal but
brake inefficient
|
1. Brake system
(Fluid leaks) 2. Brake system (Air
in) 3. Pad or lining
(Worn) 4. Pad or lining (Cracked or
distorted) 5. Rear brake shoe
clearance(Out of adjustment) 6. Pad or
lining (Oily) 7. Pad or lining
(Glazed) 8. Disc (Scored) 9. Booster system (Vacuum leaks)
|
repair air·bleed replace replace adjust adjust replace replace repair
|
Noise from
brake
|
1. Pad or lining
(Cracked or distorted) 2. Installation
bolt (Loosen) 3. Disc
(Scored) 4. Sliding pin
(Worn) 5. Pad or lining
(Dirty) 6. Pad or lining
(Glazed) 7. Anchor or Return spring
(Faulty) 8. Brake pad shim
(Damage) 9. Shoe hold-down spring
(Damage)
|
replace adjust replace replace clean replace replace replace replace
|
Brake
fades
|
1. Master
cylinder (Inoperative)
|
replace
|
Brake
vibration, pulsation
|
1. Brake booster
(Vacuum leaks) 2. Pedal free
play 3. Master cylinder
(Inoperative) 4. Caliper
(Damage) 5. Master cylinder cap
seal 6. Damaged brake lines
|
replace adjust replace replace replace replace
|
Brake
Chatter
|
Brake chatter is
usually caused by loose or worn components, or glazed or burnt
linings. Rotors with hard spots can also contribute to brake
chatter. Additional causes of chatter are out-of-tolerance rotors,
brake lining not securely attached to the shoes, loose wheel
bearings and contaminated brake lining.
|
|