User manual BENDIX ATR1DC ANTILOCK TRACTION RELAY

[. . . ] ® Bendix® ATR-1DCTM AntiLock Traction Relay Valve TRACTION CONTROL SOLENOID CONTROLLER MOUNTING HOLES (4) AUXILIARY CONTROL PORT 21 (1) SECONDARY CONTROL PORT 42 (1) MOUNTING BRACKET SUPPLY PORT (2) PRIMARY CONTROL PORT 41 (1) DELIVERY PORT (4) 2 PIN SOLENOID CONNECTOR COVER PLATE FOR REMOTE MOUNT REVERSE ANGLE VIEW REMOTE MOUNT ATR-1DCTM VALVE FIGURE 1 - ATR-1DCTM ANTILOCK TRACTION RELAY VALVE DESCRIPTION The ATR-1DCTM antilock traction relay valve is a specialized air brake valve developed for use on Bendix antilock/traction equipped vehicles. The ATR-1DCTM valve can be used on straight trucks, buses and tractors. Although this valve, in combination with the appropriate controller, can be used in any Bendix antilock traction equipped brake system, it was developed for use in systems that were built to comply with Federal regulations effective 3/1/98. It is a combination of four separate valves working in a single housing. [. . . ] Air between double check valve "A" and "B" is exhausted from the secondary circuit of the brake valve. Air between the relay piston and double check valve "B" is exhausted from the primary circuit of the brake valve. Air in the service brakes is exhausted at the main ATR-1DCTM valve's exhaust port. PREVENTIVE MAINTENANCE GENERAL Perform the tests and inspections presented at the prescribed intervals. If the ATR-1DCTM valve fails to function as described, or leakage is excessive, it should be repaired or replaced with a new or genuine Bendix remanufactured unit, available at any authorized parts outlet. 1 2 16 12 40 3 39 38 37 33 36 35 34 18 21 19 31 30 29 17 28 27 4 15 26 25 24 32 20 23 22 14 11 10 9 7 8 5 6 13 13 FIGURE 10 - ATR-1DCTM ANTILOCK TRACTION ASSEMBLY EXPLODED VIEW 8 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. valve part number (see the l. D. NOTE: For ATR-1DC TM valves not incorporating a relay piston return spring (20) the measured differential should be approximately 4 psi. Disconnect the ATR-1DCTM valve's two pin solenoid connector from the controller wire harness. Apply the probes of a volt-ohm meter to the connector leading to the solenoid and note the resistance of the solenoid is between 10 and 12 ohms. Apply and remove vehicle power (12 vdc) to the two pin connector half leading to the ATR-1DCTM valve (solenoid) while observing the brake chambers. Note that a brake application is made and held while power is applied to the ATR-1DCTM valve's solenoid and that it is released when power is removed. The leakage noted should not exceed a 1" bubble in less than 3 seconds. Make and hold a full brake application and apply a soap solution to the exhaust port and around the cover where it joins the body. The leakage noted should not exceed a 1" bubble in less than 3 seconds at the exhaust port. If the ATR-1DCTM valve fails to function as described, or leakage is excessive, it should be replaced with a new or genuine Bendix remanufactured unit or repaired using a genuine Bendix repair kit, available at any authorized parts outlet. Park the vehicle on a level surface and block the wheels and/or hold the vehicle by means other than the air brakes. Identify and mark or label all electrical wiring harnesses and air lines and their respective connections on the assembly to facilitate ease of installation. Note: The antilock controller may not be mounted to the ATR-1DCTM valve. Reconnect all air lines and wire harnesses to the unit using the identification made during REMOVAL step 1. [. . . ] Make certain that the guide (35) is centered over the spring (36), which was installed in step 3. Note; The check valve must be installed so that the top hat portion fits into the valve seat (32). Install the small and large diameter o-rings (27 & 28) on the check valve seat (23). Install the spring (26) on the inlet seat (29) so that the small diameter fits over and around the air passage through the center of the inlet seat. [. . . ]