Brake Master Cylinder: Description and Operation

Brake Master Cylinder
The brake master cylinder is a dual piston type. The brake master cylinder operates as follows:
^ When the brake pedal is depressed, pressure is applied by mechanical linkage to the primary and secondary piston.
^ Brake master cylinder pistons apply hydraulic pressure to the two opposed hydraulic circuits.
^ ABS brake master cylinder will not be overhauled, due to internal adjustments which require extensive special tools and fixtures. Service is made by installing a new master cylinder only.

The brake master cylinder consists of:
^ brake master cylinder reservoir
^ brake master cylinder body

Brake Master Cylinder Reservoir

NOTE: Whenever the brake master cylinder reservoir is removed from the brake master cylinder, new grommets must be installed.

The brake master cylinder reservoir:
^ is mounted to the brake master cylinder.
^ holds fluid supply for each brake master cylinder hydraulic piston.
^ provides visual fluid level markings.
^ contains the brake master cylinder fluid level sensor.