Brake Proportioning/Combination Valve: Description and Operation
PURPOSERegulates the hydraulic pressure in the rear brake system.
OPERATION
When the brake pedal is applied, the full rear brake fluid pressure passes through the proportioning valve to the rear brake system until the valve split point is reached. Above its split point, the proportioning valve begins to reduce the hydraulic pressure to the rear brakes creating a balanced braking condition between the front and rear wheels to minimize rear wheel skidding during hard braking.