User manual BENDIX DV-2 AUTO RESERVOIR DRAIN VALVE

[. . . ] The inlet valve remains open when pressure is ascending in the system until maximum (governor cutout) pressure is reached. The spring action of the valve guide in the sump cavity closes the inlet valve. The inlet valve and the exhaust valve are now closed (Figure 3). When reservoir pressure drops slightly (approximately 2 psi), air pressure in the sump cavity opens the exhaust valve (Figure 4) and allows moisture and contaminants to be ejected from the sump cavity until pressure in the sump cavity drops sufficiently to close the exhaust valve. [. . . ] A constant slight exhaust of air at the drain valve exhaust could be caused by excessive leakage in the air brake system. If the DV-2TM automatic drain valve does not function as described or if leakage is excessive, it is recommended that it be replaced with a new or remanufactured unit or repaired with genuine Bendix parts. CLEANING AND INSPECTION Cleaning solvent may be used on metal parts. Inspect all parts for wear or deterioration. Replace all parts not considered serviceable during these inspections. Bendix Field Maintenance Kit 282134 contains all parts necessary for servicing all models of the DV-2TM valve. INSTALLING AND REMOVING REMOVING Block and hold vehicle by means other than air brakes. Disconnect heater wire if valve is so equipped. Remove automatic reservoir drain valve. ASSEMBLY Before assembling the valve, apply a light film of grease on inlet valve seat. DO NOT APPLY OIL TO THE INLET AND EXHAUST VALVE. Place valve guide over inlet and exhaust valve. Place valve guide and inlet and exhaust assembly into cover (wire will project through exhaust port). Place body on cover and install cap screws and lockwashers. Install adapter or pipe nipple in appropriate port. Install drain valve in reservoir and reconnect heater wire if drain valve is so equipped. NOTE: Covers on the standard and heated drain valves can be interchanged. TESTING REBUILT AUTOMATIC RESERVOIR DRAIN VALVE DISASSEMBLY Remove 4 cap screws and lock washers. NOTE: The heater and thermostat of the DV-2TM valve's so equipped are not serviceable. If the heater or thermostat has failed, the entire cover must be replaced. Do not remove the thermostat cover plate. It is moisture sealed and removal could result in early thermostat failure. Remove adapter and filter assembly (if filter present). [. . . ] For vehicles with Antilock Traction Control (ATC), the ATC function must be disabled (ATC indicator lamp should be ON) prior to performing any vehicle maintenance where one or more wheels on a drive axle are lifted off the ground and moving. 1. Park the vehicle on a level surface, apply the parking brakes, and always block the wheels. Stop the engine and remove ignition key when working under or around the vehicle. When working in the engine compartment, the engine should be shut off and the ignition key should be removed. [. . . ]