AD-9 Purge Valve Kit

For trucks equipped with the AD-9 desiccant-style air dryer, the Bendix 5004341 Purge Valve Kit from Wofford Truck Parts is an essential service component. Over time, the purge valve and heater in an air dryer can degrade, allowing moisture or oil to pass into the brake system—something that can cause component corrosion, freeze up in cold weather or reduced system performance. This kit supplies the 12-volt soft-seat purge valve with integrated heater and mounting hardware necessary to restore proper purge functionality. According to supplier data, the valve kit replaces original Bendix part numbers such as 107 801, 107 896, 109 569, 109 686 and others.



With proper installation, the purge valve ensures effective moisture expulsion at each purge cycle and helps maintain the efficiency of the desiccant cartridge, reservoir and downstream piping. Ideal for fleet maintenance or one-off servicing, this kit supports longer service intervals and better system uptime.