User manual BENDIX E-14 DUAL BRAKE VALVE

[. . . ] The primary piston, which contains the exhaust valve seat, closes the primary circuit exhaust valve. As the exhaust valve closes, the inlet valve for the primary circuit moves off its seat, allowing air from the primary circuit supply port to flow out the delivery port. APPLYING: NORMAL OPERATION-SECONDARY CIRCUIT The secondary piston(18) moves with the primary piston and closes the secondary circuit exhaust. When the inlet valve in the primary portion of the valve is moved off its 2 EXHAUST EXHAUST SUP-2 DEL-2 SUP-2 DEL-1 SUP-1 DEL-1 SUP-1 DEL-1 DEL-2 PLUNGER FORCE PEDAL FORCE PLUNGER FORCE PEDAL FORCE AIR FLOW AIR FLOW FIGURE 4 - APPLYING - NORMAL OPERATION FIGURE 5 - APPLYING - FAILURE IN THE PRIMARY CIRCUIT air flow from the supply port to the delivery port. [. . . ] 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. 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. VALVE REMOVAL 1. Identify and mark or label all air lines and their respective connections on the brake valve to facilitate ease of installation. For manifold-type valves, remove the brake valve and manifold, in tact, from the vehicle. 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 DISASSEMBLY (SEE FIGURE 9) The following disassembly and assembly procedure is presented for reference purposes only. Always have the appropriate maintenance kit on hand, and use its instructions in lieu of those presented here. Refer to Figure nine throughout the procedure. 5 CAUTION: The brake valve may be light clamped in a bench vise, but overclamping may damage the valve and cause leakage and/or malfunction. If a vise is used, clamp on the supply and delivery ports on opposing sides of the valve's primary body. On valves that have a manifold on the engine compartment side, remove the bolts that secure the manifold to the valve. Separate the valve and manifold and remove the sealing rings and adapter sleeves. Remove the four cap screws(16) that secure the primary body to the secondary body. Pull secondary piston(18) out of the primary body and remove and discard o-rings(19 & 20). Remove and discard snap ring(10) from the secondary body while manually holding and compressing valve seat(11) in place. Remove and discard valve assembly(13) along with its o-ring(15) from the secondary body. [. . . ] 3/2004 Printed in U. S. A. PRIMARY PISTON DEL-1 21 O-RING WEAR RINGS SUP-1 11 O-RING FIGURE 10 16. Install the assembled secondary piston(18) in the primary body, making certain that o-rings(19 and 20) are not damaged. Secure the bodies using the four cap screws(16), and torque to 30 to 60 in. Install the pedal mounting plate on the basic brake valve, noting the relationship marked during VALVE REMOVAL step 2. [. . . ]