Brake Proportioning/Combination Valve: Tools and Equipment

The in-line proportioning valves used on this vehicle, require new pressure fittings to test for proper proportioning valve function. The pressure fittings are installed before and after the proportioning valve being test to verify proportioning valve is maintaining the required hydraulic pressure to the rear wheel brake which it controls.

If a condition of premature rear wheel skid occurs on a vehicle, the proportioning valve should always be tested prior to it being replaced. This is due to the fact that there are conditions other then a faulty proportioning valve which can cause a premature rear wheel skid.

Proportioning Valve Pressure Test Gauge Set:

The pressure gauges used for testing the in-line proportioning valves on both non-ABS and ABS brakes, is Pressure Gauge Set, Special Tool C-4007-A or equivalent, currently used for testing the combination valve.