Hydraulic System: Description and Operation

Hydraulic Brake Actuation

CAUTION: Blistering or swelling of rubber brake components may indicate contamination of the brake fluid by a petroleum based substance. New rubber components must be installed in the hydraulic system if contaminated and the entire hydraulic brake system must be flushed with clean brake fluid to prevent recontamination.

The hydraulic brake actuation system consists of the following components:
^ if equipped, Anti-Lock Brake System (ABS)
^ brake master cylinder
^ brake pressure control valve (without ABS)
^ disc brake calipers
^ rear wheel cylinders
^ brake tubes and hoses
The hydraulic brake system is diagonally split with the LH front and RH rear brakes on one circuit and the RH front and LH rear brakes on the other circuit.

Disc/Drum Actuation
The brake pedal is connected to the brake master cylinder. When the brake pedal is depressed. brake fluid is pushed through the double-walled steel lines and flexible hoses to the rear wheel cylinders and the front disc brake caliper. The brake fluid enters the rear wheel cylinder, forcing the rear wheel cylinder pistons outward against the brake shoe and lining The brake shoe and lining press against the braking surface of the brake drum. The front disc brake caliper pistons are forced outward against the brake pad and lining. and contact the braking surface of the front disc brake rotor When the brake pedal is released. the pressure is relieved returning the front disc brake caliper pistons and rear wheel cylinder pistons and the brake shoes brake pad and lining to the unapplied position

Brake Fluid

WARNING: Brake fluid contains polyglycol ethers and polyglycols. Avoid contact with eyes. Wash hands thoroughly after handling. If brake fluid contacts eyes, flush with running water for 15 minutes. Get medical attention if irritation persists. If taken internally, drink water and induce vomiting. Get medical attention immediately. Failure to follow these instructions may result in personal injury.

^ Do not reuse brake fluid drained or bled fond the brake system
^ Do not use brake fluid that has been stored in an open container
^ Do not mix different types of brake fluid.