User manual BENDIX QRN-2 QUICK RELEASE VALVE

[. . . ] In its standard configuration the valve is designed to deliver within 1 psi of control pressure. However, for special applications the valve is available with zero hysteresis. Supply Delivery Exhaust SUP 1 DEL 2 EXH 3 SUPPLY DIAPHRAGM Supply port: 1/2"-14 P. T. [. . . ] 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. Where circumstances require that the engine be in operation, EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving, rotating, leaking, heated or electrically charged components. FIGURE 5 - QRN-2TM QUICK RELEASE VALVE BALANCE 3. Do not attempt to install, remove, disassemble or assemble a component until you have read and thoroughly understand the recommended procedures. Use only the proper tools and observe all precautions pertaining to use of those tools. If the work is being performed on the vehicle's air brake system, or any auxiliary pressurized air systems, make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle. If the vehicle is equipped with an AD-ISTM air dryer system or a dryer reservoir module, be sure to drain the purge reservoir. Following the vehicle manufacturer's recommended procedures, deactivate the electrical system in a manner that safely removes all electrical power from the vehicle. Never connect or disconnect a hose or line containing pressure; it may whip. Never remove a component or plug unless you are certain all system pressure has been depleted. must be of equivalent size, type and strength as original equipment and be designed specifically for such applications and systems. Components with stripped threads or damaged parts should be replaced rather than repaired. Do not attempt repairs requiring machining or welding unless specifically stated and approved by the vehicle and component manufacturer. Prior to returning the vehicle to service, make certain all components and systems are restored to their proper operating condition. SERVICE CHECKS 1. Visually inspect the valve's exterior for cracks, gouges, or other physical damage. Inspect all air lines connected to the valve for signs of wear or physical damage. Test air line fittings for excessive leakage and tighten or replace as necessary. OPERATIONAL AND LEAKAGE TESTS 1. Apply and release the service brakes several times and check for prompt response of the brakes at the appropriate wheels. [. . . ] Install the QRN-2TM valve on the vehicle using the mounting hardware saved during removal. Reconnect all air lines to the valve using the identification made during removal. Perform OPERATIONAL AND LEAKAGE TESTS before placing the vehicle back into service. [. . . ]