Brakes and Traction Control: Description and Operation

BASE BRAKE SYSTEM OPERATION
When a vehicle needs to be stopped, the driver applies the brake pedal. The brake pedal pushes the input rod of the power brake booster into the booster. The booster uses vacuum to ease pedal effort as force is transferred through the booster to the master cylinder. The booster's output rod pushes in the master cylinder's primary and secondary pistons applying hydraulic pressure through the chassis brake tubes, junction block, and proportioning valves to the brakes at each tire and wheel assembly.
Front disc brakes control the braking of the front wheels; rear braking is controlled by rear drum brakes as standard equipment. Rear disc brakes are optional.
The hydraulic brake system is diagonally split on both the non-antilock and antilock braking systems. This means the left front and right rear brakes are on one hydraulic circuit and the right front and left rear are on the other.
All available brake systems on this vehicle use the same type of brake line fittings and tubing flares. The brake line fittings used are double wall ISO style tubing flares and fittings at all tubing joint locations. Only the outlets of the proportioning valves and the rear flex hoses threading into them have non-ISO style flares. They are double inverted style flares.

Brake Tube Nut Thread Sizes And Tube Routing:

See provided image for specific joint locations and tube fitting size.

Vehicles equipped with the optional Antilock Brake System (ABS) (with and without traction control) use a system designated Mark 20, which is supplied by ITT Teves. This system shares most base brake hardware used on vehicles without ABS. All components differing from the base brake hardware are described in detail in Antilock Brake System.
The parking brakes are pedal-operated. When applied, the parking brake lever pulls on cables that actuate brake shoes at each rear wheel.