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. 1A) incorporates a nipple mounted PR-3TM valve. 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. [. . . ] 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 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. 4 8. 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. 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. Remove the PR-3 TM valve from the SR-4 TM valve assembly. air pressure at the supply port and apply a soap solution to the delivery port. Leakage of a 1" bubble in 3 seconds is permissible. Apply a soap solution to the supply port. If the PR-3TM valve does not function as described above or leakage is excessive, it is suggested it be exchanged or replaced at the nearest Bendix distributor. [. . . ] Place the spring retainers over the springs and retain with the eight #10 cap screws. Torque to 20-30 inch pounds. ASSEMBLY TYPE 1 SR-4TM VALVE (REFER TO FIG. 4) RESERVOIR FITTING (CHECK VALVE "C") AND INLET EXHAUST VALVE 1. Place reservoir fitting (13) in a vise, pipe threads down. [. . . ]