Brake Proportioning/Combination Valve: Description and Operation

Proportioner Valves:

DESCRIPTION
The proportioner valves are designed to provide better front to rear braking balance with heavy brake application. In addition, a quick take-up feature is incorporated which provides a large volume of fluid to the wheel brakes at low pressure with initial brake apply. The low pressure fluid quickly provides the displacement requirements created by the seal retraction of the pistons into the front or rear calipers or spring retraction of the rear drum brake shoes, if used.