User manual BENDIX QR-1C DBL CHECK QUICK RELEASE VALVE

[. . . ] However, for special applications the valve is available with greater differential pressure or zero hysteresis. QR-1CTM valves also come with optional noise reducing foam crosses or silencers. Some QR-1CTM valves can also come with biased double check valves. These double check valves contain a beaded seat cap nut (Figure B). [. . . ] Service air passing through the valve flexes the double check and quick release diaphragms, sealing the supply and exhaust ports. When the service application is released, air is exhausted from the spring brakes. OPERATING AND LEAKAGE TESTS Before performing these tests, park the vehicle on a level surface and hold the vehicle by means other than the brakes. With the park control valve in the released position, note that the spring brakes are released. Remove the air line connected to the QR-1CTM valve balance port and apply a soap solution to the exhaust and balance port. A 1" bubble in 5 seconds is permissible at either location. Reconnect the QR-1CTM valve balance line; and using the park control valve, park the vehicle. NOTE: A prompt application of the spring brakes with an exhaust of air at the QR-1CTM valve exhaust port. Remove the air line connected to the supply port of the QR-1CTM valve. With a service brake application hold applied, apply a soap solution to the supply port and around the seam between the body and cover. A 1" bubble in 5 seconds is permissible at the supply port. No leakage is permitted between the body and cover. If the 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. 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. At a minimum, the QR-1CTM valve should be inspected every 12 months or 3600 operating hours, whichever comes first, for proper operation. Should the QR-1CTM valve not meet the elements of the operational tests noted in this document, further investigation and service of the valve may be required. REMOVAL 1. Block vehicle wheels and/or hold vehicle by means other than air brakes. Identify and disconnect air lines from valve. 2 INSTALLATION Mount valve with exhaust port pointing down; securely tighten mounting bolts. [. . . ] 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. [. . . ]