User manual BENDIX MV-3 DASH CONTROL MODULE

[. . . ] This complies with Federal Regulations that one control must apply all the parking brakes on the vehicle. 7. Build both service reservoirs to 120 P. S. I. Decrease the pressure at the secondary reservoir. The primary reservoir pressure should not drop below 100 P. S. I. [. . . ] Note: The yellow button must not pop out before the red button. Hold the red button in and continue to reduce pressure in all service reservoirs. Air must start to escape from the exhaust port when the trailer supply line pressure reaches 20 P. S. I. Release the red button and rebuild the supply pressure to at least 120 P. S. I. Push in the yellow button; the yellow button must remain in. Push the red button in and pull the yellow button out. The red button must pop out almost instantaneously. 9. 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. CAUTION: Note the orientation of the buttons in relation to the valve to be sure they will be replaced properly. DISASSEMBLY OF THE MV-3TM VALVE 1. Remove the red (1) and yellow (2) buttons from the stems of the spools on the MV-3TM valve by turning in a counterclockwise direction. Remove and save the mounting hardware from the four corners of the cover plate (3). If removing the valve from the vehicle, remove and identify the air lines from the back of the valve. 1 2 4. Remove the six Phillips head screws (4) from the cover plate (3) and carefully remove the cover plate (3) from the valve. 4 5. Remove the cap (5) and o-ring (6) from the bore of the tripper valve. Remove the piston (7), spring (8), spring (9) and check valve (10). These parts will all fall out of the cavity of the MV-3TM valve by tilting the body forward. Remove the o-ring (11) from its groove on the piston (7). Remove the two main spools from the body of the MV-3TM valve by grasping the stem and pulling firmly. Remove the two springs (12) from the bottom of each spool cavity. Pull the guide spool (14) over the threaded end of one of the plungers (15). Remove the o-ring (16) from the guide spool (14). [. . . ] Attach the red (1) and yellow (2) buttons onto the threaded stems of the spools, making sure that they are oriented correctly as noted in Step 1 of Disassembly procedure. Reattach the MV-3TM valve to the dash using the hardware removed in Step 2 of Disassembly. If air lines were removed during disassembly, reconnect to ports marked during disassembly. When reconnecting threaded ports use a liquid thread sealing compound, attach the air line until it is hand tight and then turn approximately one and a half turns further (or using a maximum of 10 ft. lbs. [. . . ]