User manual BENDIX TW-1-3-4-5-6 CONTROL VALVES

[. . . ] Some versions have a heavy inlet valve spring making them suitable for vacuum control. TW-4TM (Figure 3) and TW-5TM valves are similar to the TW-1TM valve except the plunger is designed for a push button (TW-4TM valve), giving momentary application whenever the button is depressed. The TW-5TM valve is similar, but has an extended plunger. SD-03-3602 1 SCREW PUSH BUTTON NUT FIGURE 3 - TW-4TM CONTROL VALVE FIGURE 4 - TW-6TM CONTROL VALVE The TW-6TM valve (Figure 4) is a TW-1TM valve with a grounding switch included. In the exhaust position the switch is open. [. . . ] When the plunger is depressed by the cam action of the lever (Figure 1) or by a direct force on a push button (Figure 3) the plunger contacts the inlet valve, closing the exhaust passage and pushes the inlet valve off the inlet seat in the body, allowing supply air to flow through the delivery ports to the controlled device. SERVICE CHECKS OPERATING AND LEAKAGE TESTS Connect a 100 psi air pressure source to the supply port and connect delivery to an air gauge (if there are two delivery ports, plug one). With the valve in the released position, check for leakage at the exhaust holes with a soap solution. Place the valve in the applied position. Supply air pressure should show on the gauge. Leakage should not exceed 100 SCCM or a 1" bubble formed in 5 seconds. If the TW valve does not function as described or if excessive leakage occurs, it is recommended that it be replaced with a new unit or repaired with genuine Bendix parts. 2 7. 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. REMOVAL Disconnect all air lines and remove the valve. INSTALLATION Place the valve handle through appropriate hole in the panel, place the dial (if used) over handle and install the mounting screws. Apply air pressure and check/ repair air leaks. 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. [. . . ] 2) Place inlet valve spring on inlet valve. 3) Place o-ring on cap nut and install cap nut. 4) Install plunger spring into top of body. 5) Install o-ring seal on plunger and install plunger. [. . . ]