User manual BENDIX SC-3 INLINE SINGLE CHECK VALVES

[. . . ] Bendix® SC-3TM In-Line Single Check Valves inlet outlet spring (one sc-3TM valve model features this 1/16" pipe plug) inlet outlet wafer-type check valve FIGURE 2 - SC-3TM Single CheCk valve: wafer-type (exterior and CroSS-SeCtional viewS) inlet spring outlet FIGURE 1 - SC-3TM Single CheCk valveS DESCRIPTION The Bendix® SC-3TM in-line single check valve is a device placed in an air line to allow air flow in one direction only and to prevent flow of air in the reverse direction. The two types of SC-3TM in-line single check valves are: 1. An arrow indicating the direction of air flow is found on the body of the valve. outlet ball FIGURE 3 - SC-3TM angle CheCk valve: ball type (exterior and CroSS-SeCtional viewS) OPERATION Air flow in the normal direction moves the check valve from its seat, and the flow is unobstructed. [. . . ] With air pressure present at outlet side of check valve and the inlet side open to atmosphere, coat the open end of the check valve with soap suds; a 1" bubble in 5 seconds is permissible (100 SCCM). If the check valve does not function as described, or leakage is excessive, it is recommended that it be replaced with a new genuine Bendix part available at any Bendix parts outlet. REMOVAL Block and hold vehicle by means other than air brakes. Disconnect air lines at single check valve and remove. DISASSEMBLY/ASSEMBLY Note: There are no Disassembly/Assembly procedures for SC-3TM valves. If a valve does not meet the Operational and Leakage tests, it should be replaced at any authorized Bendix parts outlet. TESTING AND TROUBLESHOOTING Perform "Operating and Leakage Checks". warning!pleaSe read and follow theSe inStruCtionS to avoid perSonal injury or death: when working on or around a vehicle, the following general precautions should be observed at all times. 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. 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. 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-IS® 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. [. . . ] 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. 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. general Safety guidelineS 2 BW1892 © 2007 Bendix Commercial Vehicle Systems LLC. [. . . ]