Brake Proportioning/Combination Valve: Description and Operation

All models include a brake pressure control valve to regulate hydraulic pressure in the rear brake circuit. When the brake pedal is applied, full rear brake circuit pressure passes through the brake pressure control valve to the rear brake circuit until the brake pressure control valve split point is reached. Above the split point, the brake pressure control valve begins to reduce hydraulic pressure to the rear brake circuit, creating a balanced braking condition between the front and rear wheels while maintaining balanced hydraulic pressure at each rear wheel.