Hydraulic Brake Diagnostic - GMC chevrolet camaro 2000 Service Manual

5-12 Hydraulic Brakes
Brakes
Hydraulic Brake Diagnostic System Check (cont'd)
Symptom Causes
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Brake Pedal Travel Gradually Increases
• Leaking brake line or connection. Refer to Brake
Fluid Leak.
• Leaking piston seal. Refer to Brake Caliper Overhaul
(Front) or Brake Caliper Overhaul (Rear).
• Leaking master cylinder (internal). Replace master
cylinder.
• Restricted passage in the vacuum booster.
• Damaged vacuum booster. Refer to Vacuum Brake
Booster Replacement.
• Restricted brake fluid passage.
Excessive Brake Pedal Effort
• Leaking vacuum or booster system.
• Restricted passage in the vacuum booster.
• Damaged vacuum booster. Refer to Vacuum Brake
Booster Replacement.
• Worn out brake lining.
• Glazed brake lining.
• Incorrect brake lining material.
• Contaminated brake lining.
• Brake lining damage by abuse.
• Improper rotor surface finish.
• Restricted brake fluid passage.
• Brake pedal linkage interference or binding.
• Operator riding the brake pedal.
• Low engine vacuum.
• Excessive vehicle loading.
~
Rotor corroded.
Excessive Braking Action • Damaged vacuum booster. Refer to Vacuum Brake
Booster Replacement.
• Worn out brake lining.
• Unevenbrake lining wear.
(
• Incorrect brake lining material.
• Brake lining damage by abuse.
• Improper rotor surface finish.
• Scored rotor. Refer to Refinishing Brake Rotors (Front).
• Brake assembly attachments loose (including splash
shield).
Brakes Slow To Respond • Air in the brake system. Refer to Hydraulic Brake
System Bleeding (Manual Bleeding) or Hydraulic Brake
System Bleeding (Pressure Bleeding).
• Contaminated or improper brake fluid. Refer to Brake
Fluid and Brake Fluid Handling.
• Leaking vacuum or booster system.
• Restricted passage in the vacuum booster.
• Damaged vacuum booster. Refer to Vacuum Brake
Booster Replacement.
O
Glazed brake lining.
• Restricted brake fluid passage.
• Brake pedal linkage interference or binding.
• Sticking caliper or caliper pistons. Refer to Brake Caliper
Overhaul (Front) or Brake Caliper Overhaul (Rear).
• Low engine vacuum.
Brakes Slow To Release • Contaminated or improper brake fluid. Refer to Brake
Fluid and Brake Fluid Handling.
• Restricted passage in the vacuum booster.
• Damaged vacuum booster. Refer to Vacuum Brake
Booster Replacement.
• Restricted brake fluid passage.
• Brake pedal linkage interference or binding.
• Sticking caliper or caliper pistons. Refer to Brake Caliper
Overhaul (Front) or Brake Caliper Overhaul (Rear).
• Parking brake not releasing.
• Caliper to knuckle clearance.