User manual BENDIX QR-L INLINE QUICK RELEASE VALVE

[. . . ] Material: Die cast zinc Operating pressure: 150 psi maximum Operating temperature: -40° to 200° F 1 SD-03-906 Service Brake Valve Tractor Protection Valve Control Line QR-LTM Valve Exhaust Supply Trailer Control Valve Trailer Supply Valve Delivery Diaphragm Exhaust FIGURE 5 QR-LTM INLINE QUICK RELEASE VALVE BALANCED MODE Exhaust Supply Line QR-LTM Valve FIGURE 3 TYPICAL QR-LTM INLINE QUICK RELEASE VALVE AIR SYSTEM APPLICATION OPERATION 0 psi Crack & Differential Pressure Unlike standard quick release valves, the QR-LTM valve maintains the same pressure at the supply and delivery ports (0 psi crack and differential) throughout the entire pressure range during both apply and release modes. Three radial channels in the cap, along with a specially shaped diaphragm, provide the QR-LTM valve with this feature. Apply When air pressure enters the supply port, it causes the center portion of the diaphragm to seal the exhaust in the body. Supply air pressure simultaneously forces the edges of the diaphragm away from its seat on the cap, allowing air to flow freely out the delivery port. [. . . ] 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 exceed manufacturer's recommended pressures. 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. Use only genuine Bendix ® replacement parts, components and kits. Replacement hardware, tubing, hose, fittings, etc. 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 physical damage. Replace the valve if excessive physical damage is noted. Inspect all air lines connected to the valve for signs of wear or physical damage. Repair or replace as necessary. OPERATIONAL AND LEAKAGE TESTS 1. Block the vehicle's wheels and fully charge the air system. Apply and release air pressure rapidly to the QR-LTM valve several times and check for prompt response. With air pressure applied to the supply port, apply a soap solution to the QR-LTM valve exhaust ports. Leakage of a 1" bubble in 5 seconds is permissible. [. . . ] Perform OPERATIONAL AND LEAKAGE TESTS before placing the vehicle back into service. PREVENTIVE MAINTENANCE Important: Review the Bendix Warranty Policy before performing any intrusive maintenance procedures. A warranty may be voided if intrusive maintenance is performed during the warranty period. No two vehicles operate under identical conditions, as a result, maintenance intervals may vary. Experience is a valuable guide in determining the best maintenance interval for air brake system components. [. . . ]