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. [. . . ] 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. Build the air system pressure to governor cutout. Apply a soap solution to the exhaust port. 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. Drain the air pressure from all vehicle reservoirs. Identify and mark or label all electrical wiring harnesses and air lines and their respective connections on the assembly to facilitate ease of installation. Disconnect the air lines and wire harnesses. Remove the controller and valve assembly (AT-1DCTM) from the vehicle. Note: The antilock controller may not be mounted to the ATR-1DCTM valve. Install the assembled unit on the vehicle. Reconnect all air lines and wire harnesses to the unit using the identification made during REMOVAL step 1. After installing the unit, perform the OPERATION & LEAKAGE TESTS for the air valve before placing the vehicle in service. 9 OPERATION & LEAKAGE TESTS GENERAL A change in vehicle braking characteristics or a low pressure warning may indicate a malfunction in one or the other brake circuit, and although the vehicle air brake system may continue to function, the vehicle should not be operated until the necessary repairs have been made and both braking circuits, including the pneumatic and mechanical devices are operating normally. Always check the vehicle brake system for proper operation after performing brake work and before returning the vehicle to service. Apply and release the brakes several times and check for prompt application and release at each wheel. If a prompt reaction is noted at some, but not all wheels, test the antilock modulator (M-21TM or M-22TM) between the ATR-1DCTM valve and the brake chamber for proper operation. If a sluggish response is noted at all wheels, inspect for a kinked or obstructed air line leading to or from the ATR-1DCTM valve. If a complete release of the brakes is noted at some, but not all wheels, test the antilock modulator (M-21TM or M-22TM) between the ATR1DCTM valve and the brake chamber for proper operation. If an incomplete release is noted at all wheels, inspect for a kinked or obstructed air line leading to or from the ATR-1DCTM valve. [. . . ] Install the valve guide (25) so that its flange contains (surrounds) the coils of the large end of the spring (26), when the valve seat (23) is installed in the cover (3). Use a small amount grease to hold these parts in the valve seat (23). Install the assembled valve seat (23) with the check valve and valve guide (24 & 25) into the cover (3) bore and while holding it in place install the retaining ring (22). Make certain the retaining ring is fully seated in its groove. [. . . ]