Leakage Tests of the Bendix Automatic Drain Valve

Perform the following test after repairing or replacing the DV-2 valve, to ensure that the valve is functioning properly.

With the system charged and pressure stabilized in the system, there should be no leaks at the drain valve exhaust port. A constant slight exhaust of air at the drain valve exhaust port could be caused by excessive leakage in the air brake system.

If the drain valve is leaking excessively, repair or replace it. See Cleaning and Inspection of the Drain Valve, Air Reservoir Automatic Drain Valve, Bendix DV-2 of the Cascadia Workshop Manual.