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BRAKES 5-67 TROUBLESHOOTING Condition and Cause Correction Poor Brake Action Master cylinder faulty Correct or replace Power cylinder faulty Correct or replace Level of brake fluid in reservoir too low Replenish and bleed Air in hydraulic circuit Bleed Front disc brake caliper faulty Clean or replace Rear brake wheel cylinder faulty Clean or replace Water or oil on brake pads or linings Clean or replace Brake pads or linings hardened Replace Brake pads or linings in poor contact with rotor or brake drum Correct Brake pads or linings worn Replace Brake disc or drum rusted Grind or replace Check valve in vacuum hose faulty Correct or replace Brake Squeak Brake pads or linings worn Replace Brake pads or linings hardened Replace Brake pads or linings in poor contact with rotor or brake drum Correct Brake disc(s) warped, worn or damaged Grind or replace Disc brake anti-squeak shims fatigued Replace Front hub bearings loose or preload is incorrect Adjust or replace Brake disc or drum rusted Grind or replace Brake Pull Tire inflation pressures unequal Adjust Front wheel alignment incorrect Adjust Water or oil on brake pads or linings Clean or replace Brake pads or linings hardened Replace Brake pads or linings worn excessively Replace Brake drum or rotor worn or scored Grind or replace Front or rear wheel cylinder or disc brake caliper malfunctioning Clean or replace Front hub bearing preload incorrect Adjust or replace Brake pad or lining clearances unequal Adjust or replace Brake Drag Parking brake maladjusted Adjust Brake pad or lining clearance insufficient Adjust Brake pedal free play insufficient Adjust brake pedal height or power cylinder operating rod Piston in master cylinder sticking Clean or replace Pistons in disc brake caliper sticking Replace piston seals Pistons in rear brake wheel cylinders sticking Clean or replace Brake pads sticking in caliper Clean Return springs weakened Replace Parking brake binding Overhaul rear brakes Front hub bearing preload incorrect Adjust or replace Rear brake shoes not returning Correct or replace brake back plate, check automatic adjuster and Obstructions in hydraulic circuit Clean Rotor warped excessively Grind or replace Rear brake drum distorted Grind or replace Piston cups swollen Replace brake fluid and piston cups Check valve ; vacuum hose faulty Replace Parking cable sticking Clean or replace Rear disc brake over adjust Adjust or overhaul rear brakes Excessive Brake Pedal Travel Air in hydraulic circuit Bleed hydraulic circuit Level of brake fluid in reservoir too low Replenish brake fluid reservoir to specified level and bleed hydraulic Master cylinder push rod clearance excessive Adjust Leakage in hydraulic system Correct or replace defective parts Rear disc brake autoadjuster malfunction Overhaul rear brakes |