TIAGO

BRAKES 28 6.10.3 BRAKE TROUBLE SHOOTING Before starting to "Brake" trouble shooting, inspect the vehicle brake hydraulic system and brake system components. It is strongly recommended to inspect the following before the actual road test.  Apply and hold the brakes. Check for brake fluid leakages at all connections and correct as necessary.  Repeatedly apply and release the brakes to observe brake shoe motion. If either brake is slow to respond investigate for binding and/or airlock restriction.  Brake fluid level in the reservoir / connector  Brake pads / Brake shoes.  Brake Drum / Disc / Caliper  Brake system for corrosion, chafing and damage from road stones (Visual Inspection)  Brake lag  Ensure correct tyre pressure and check for tyre wear. BRAKE FLUID LEAKS: Check the master cylinder fluid levels. An abnormally low level indicates a leak in the system. In such a case, check the entire brake system for leakage. The cause should be corrected and defective parts should be replaced. Note that a slight drop in the fluid level does result from normal wear of brake lining. CONTAMINATED BRAKE FLUID: Improper brake fluid or water ingress in the fluid may cause the brake fluid to boil or deterioration of the rubber components in the hydraulic system. If the piston cups/piston seals are swollen, then rubber parts have deteriorated. This deterioration may also be evidence of swollen wheel cylinder piston cups on the drum brake wheels. If deterioration of rubber is evident, disassemble all hydraulic parts and wash with alcohol. Dry these parts with compressed air before assembly to keep alcohol out of the system. Replace all rubber parts in the system including hoses. Also when working on the brake mechanisms, cheak for fluid on the linings. If excessive fluid is found, replace the linings. If master cylinder piston seals are satisfactory, check for leakage or excessive heat conditions. If condition is not found drain fluid, flush with brake, refill and bleed the system. The system must be flushed inferior quality fluid is found in the system. ROAD TESTING:  Road test for the brakes shall be taken by the skilled driver with sufficient experience.  Brakes shall be tested on dry, clean smooth and reasonably level road which is not crowded.  Drive the vehicle at low speeds in a safe area.  Test the brakes by making brake applications with both light and heavy pedal forces at various speeds to determine if the car stops evenly and effectively.  If required carry out wheel balancing and alignment.