HARRIER SERVICE MANUAL PART -1

BRAKES 9 5. 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. 5. Pedal return spring came out / broken. 6. One of both primary seals damaged in TMC. 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. 5. Check and replace. 6. Check and replace TMC. 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. 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.