Use the table below to
help you find the cause of theproblem. The numbers indicate the priority
of the likecause 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 bleeding 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. Pad (Cracked or
distorted) 5. Piston
(Stuck) 6. Piston
(Frozen) 7. Booster system (Vacuum
leaks) 8. Master cylinder
(Inoperative)
|
adjust adjust repair replace replace replace repair replace
|
Brake pull
|
1. Piston
(Sticking) 2. Pad
(Oily) 3. Piston
(Frozen) 4. Disc
(Scored) 5. Pad (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 (Worn) 4. Pad (Cracked or distorted) 5.
Rear brake shoe clearance(Out of adjustment) 6.
Pad (Oily) 7. Pad
(Glazed) 8. Disc
(Scored) 9. Booster system (Vacuum
leaks)
|
repair Air bleeding replace replace adjust replace replace replace repair
|
Noise from
brake
|
1. Pad (Cracked or
distorted) 2. Installation bolt
(Loosen) 3. Disc
(Scored) 4. Sliding pin
(Worn) 5. Pad (Dirty) 6. Pad (Glazed) 7. Brake
pad shim (Damage)
|
replace adjust replace replace clean replace replace
|
Brake fades
|
1. master
cylinder
|
replace
|
Brake vibration,
pulsation
|
1. brake
booster 2. pedal free
play 3. master cylinder 4. caliper 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.
|
|