Master Cylinder

Changes in brake pedal feel or travel indicate possible problem in brake system. When diagnosing brake system problems, use brake warning light, pedal feel/travel and fluid level as indicators. Following symptoms indicate brake trouble:

Pedal goes down fast:

• Check for leaks or air in system.

Pedal goes down slowly:

• Check for external or internal leaks.

Pedal is low and/or feels spongy:

• Check for empty master cylinder reservoir, reservoir cap vent holes clogged, rear brakes out of adjustment or air in system.

Pedal effort too high:

• Check for binding or obstruction in pedal linkage. Check for poor booster assist.

Brake warning light is on:

• Check for low fluid level, ignition wires too close to fluid level indicator assembly, damaged indicator float, low vacuum (diesel) or applied parking brake.