Proportioning Valve

The proportioning valve regulates the hydraulic pressure in the rear brake system. It is located between the rear brake system's inlet and outlet ports in the control valve. 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's split point is reached. Above its split point, the proportioning valve increases the hydraulic pressure at a lower rate to the rear brakes, creating a balanced braking condition between the front and rear wheels to minimize rear wheel skidding during hard braking.