3. SERVICING OF BRAKE BOOSTER The output rod is retained internally and cannot be extracted. If the rod or the domed screw on the rod end is damaged the Supervac Unit must be replaced completely. No attempt should be made to disturb the domed screw. This is correctly set at the factory and should never be disturbed. 1. Booster Assembly Kit 2. Vacuum Sensor Assembly 3. Vacuum Sensor Grommet 4. Spring Washer 5. Hex Nut D. 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. 1. Apply and hold the brakes. Check for brake fluid leakages at all connections and correct as necessary. 2. 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. 3. Brake fluid level in the reservoir / connector 4. Brake pads / Brake shoes. 5. Brake Drum / Disc / Caliper 6. Brake system for corrosion, chafing and damage from road stones (Visual Inspection) 7. Brake lag 8. Ensure correct tyre pressure and check for tyre wear. BRAKE FLUID LEAKS Check the master cylinder Oil Reservoir 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, check 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. NOTE Servicing of the fixed seal master cylinder internal parts are not recommended and if a major fault is apparent, a new complete guaranteed unit should be fitted. NOTE Other than non-return valve kit, internal parts of brake booster are not serviceable in case of a major complaint/fault; replace the brake booster as an assembly. BRAKE (MR) 30
RkJQdWJsaXNoZXIy MTIwNTUz