User manual BENDIX SR-4 SPRING BRAKE CONTROL VLV

[. . . ] Bendix® SR-4TM Spring Brake Control Valve #2 RESERVOIR CHARGING PORT #2 RESERVOIR CHARGING PORT #1 RESERVOIR CHARGING PORT SERVICE PORT SERVICE PORT #1 RESERVOIR CHARGING PORT DELIVERY PORTS (4) TRAILER SUPPLY PORT TYPE 1 DELIVERY PORTS (4) FIGURE 1B TYPE 2 TRAILER SUPPLY PORT FIGURE 1A FIGURE 1 - SR-4TM SPRING BRAKE CONTROL VALVE TYPE 1 & TYPE 2 DESCRIPTION The SR-4TM valve is provided in two different configurations. 1B) has the function of the additional PR-3TM valve integrated into the main housing. There is no difference in the operational performance of the two designs. The SR-4TM trailer spring brake control valve is similar to the SR-2TM valve. [. . . ] If the SR-4TM spring brake valve does not function as described above or leakage is excessive, it is recommended that it be repaired or replaced with a genuine Bendix service replacement valve. 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. 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. 4 8. 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. 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. REMOVAL OF VALVE FROM VEHICLE 1. Check the vehicle wheels and drain all air system reservoirs completely. Disconnect all supply, delivery and exhaust lines at the trailer spring brake valve. NOTE: Mark all air lines and their relation to the spring brake valve for reconnection. Remove the spring brake valve from the trailer #1 reservoir. PR-3TM VALVE REMOVAL AND TEST (TYPE 1 SR-4TM VALVE) 1. [. . . ] Retain with the four 1/4 inch cap screws, torque to 30-60 inch pounds. Install the four check valve assemblies (4) into the cavities of the SR-4TM valve and retain with the 3/8 inch pipe plugs. Apply a thread sealant or Teflon tape to the threads of the pipe plugs and torque to 130-170 inch pounds. Install the two piston assemblies (3) into their cavities, place the spring (1 & 2) over the bosses of the piston assemblies. [. . . ]