TIAGO TIGOR CNG - SERVICE MANUAL

BRAKES 8 5. DIAGNOSIS a) SPONGY BRAKE PEDAL SR. NO. CAUSES REMEDY 1 Air in hydraulic System Bleed the system & top up 2 Soft or Weak Hose Check & Replace 3 Poor Quality Brake Fluid Flush the System & refill with recommended grade of Brake Fluid 4 Excessive Worn / Weak Drums in Rear Replace Rear Brake Drums b) BRAKE ROUGH OR CHATTER ON APPLICATION SR.NO CAUSES REMEDY 1 Excessive lateral run out in disc or parallelism Repair if possible or replace the disc not within specification 2 Rear drum out of round Check run out, repair or replace drum as necessary 3 Broken anti-rattle clip Replace 4 Incorrect parking brake adjustment Check and adjust as per specifications 5 Seized caliper pistons Overhaul calipers 6 Damaged or loose wheel bearing Replace wheel bearing 7 Distorted steering knuckle or rear wheel spindle Replace knuckle or rear wheel spindle c) EXCESSIVE BRAKE PEDAL EFFORT (HARD PEDAL) SR.NO. CAUSES REMEDY 1 Lining soiled with brake fluid, oil or grease Replace 2 Brake pad worn below Recommended thickness. Replace 3 Mal-functioning of Servo Identify the trouble in Servo and rectify 4 Partial system failure Check both primary and secondary circuits (in tandem master cylinder) and rectify 5 Piston in calipers stuck or sluggish Remove caliper and overhaul 6 Fading brake due to non recommended grade of brake pads. Replace with approved grade of brake pads 7 Kinked, dented or clogged bundy pipes hoses Identify and Replace 8 Binding pedal linkage Lubricate and free up the system 9 Vacuum leakage through hose or hose connection Check the hose connections if required replace the vacuum hose