1143 / 1906
BRAKES
6
1.2 GENERAL SYMPTOMS DIAGNOSIS :
PROBLEM
CAUSE
REMEDY
Spongy Brake Pedal
1. Air in hydraulic system
2. Soft or weak hose
3. Poor quality brake fluid.
4. Low brake fluid level.
1. Bleed the system and top up.
2. Check and Replace
3. Flush the system and refill with
recommended grade of brake fluid.
4. Top up the brake fluid.
Brake Rough Or Chatter
On Application
1. Excessive lateral run out in disc or
parallelism
2. Broken anti-rattle clip
3. Incorrect parking brake adjustment.
4. Seized caliper pistons.
5. Damaged or loose wheel bearing
6. Distorted steering knuckle or rear
wheel spindle.
7. Caliper bolt loosened.
1. Repair if possible or replace the
disc if not within specification.
2. Replace
3. Check and adjust as per
specifications.
4. Overhaul Calipers
5. Replace wheel bearing
6. Replace knuckle or rear wheel
spindle.
7. Tighten the bolt to the specified
torque.
Excessive Brake Pedal
Effort
(Hard Pedal)
1. Lining soiled with brake fluid, oil or
grease.
2. Malfunctioning of Servo.
3. Partial system failure (in tandem
master cylinder).
4. Piston in calipers stuck or sluggish
5. Fading brake due to non-
recommended grade of brake pads.
6. Kinked dented or clogged bundy
pipes, hoses or 'T' connections.
7. Binding pedal linkage.
8. Vacuum leakage through the system.
9. Booster NRV or NRV line faulty/ not
working.
10. Vacuum pump defective.
1. Replace
2. Identify the trouble in Servo and
rectify.
3. Check both front and rear circuits
and rectify.
4. Remove caliper and rebuild
5. Replace with approve grade of
brake pads.
6. Identify and Replace.
7. Lubricate and free up the system.
8. Rectify the leakage.
9. Rectify/ replace the NRV.
10. Repair vacuum pump.
Brake Noise
1. Glazed shoe linings or foreign
matters stuck on linings
2. Worn or distorted shoe linings.
3. Loose front wheel bearings.
4. Distorted backing plate or loose
mounting bolts.
1. Repair or replace shoe linings.
2. Replace shoe linings or pads.
3. Replace wheel bearing.
4. Replace or retighten