User manual BENDIX ATR-1 ANTILOCK TRACTION RELAY

[. . . ] ® Bendix® ATR-1TM AntiLock Traction Relay Valve MOUNTING BRACKET CONTROLLER MOUNTING HOLES (4) SERVICE PORT TRACTION CONTROL SOLENOID UNDRILLED "CON" PORT SUPPLY PORT BODY DELIVERY PORT (4) 2 PIN SOLENOID CONNECTOR SUPPLY PORT COVER PLATE FOR REMOTE MOUNT REMOTE MOUNT ATR-1TM RELAY VALVE FIGURE 1 - ATR-1TM ANTILOCK TRACTION RELAY VALVE DESCRIPTION The ATR-1TM antilock traction relay is a specialized air brake valve developed for use on Bendix antilock/traction equipped vehicles. It is essentially three separate valves working in combination in a single housing. An R-14TM style service relay is the base valve and is fitted with a modified cover containing a double check valve and a traction control solenoid. The ATR-1TM valve contains both air and electric components to provide the service braking and traction control (differential braking) functions. [. . . ] Note that a brake application is made and held while power is applied to the ATR-1TM 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. Drain the air pressure from all vehicle reservoirs. REMOVAL 1. 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 from the vehicle. INSTALLATION 1. 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. 7 2 1 35 34 33 32 PRIOR INTERNAL COMPONENT CONFIGURATION 12 16 31 30 29 28 27 26 25 24 23 22 3 Assembly of items 29-35 34 Key 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 18 21 19 35 20 17 22 4 15 14 Description Key Description ECU Control 19 Relay Piston Bolts (4) 20 Piston Spring (if used) Cover 21 O-Ring Base 22 Retaining Ring Retaining Ring 23 Check Valve* Exhaust Cover 24 O-Ring O-Ring 25 Inlet Seat* O-Ring 26 Check Valve Seat Valve Spring 27 O-Ring Valve Retainer 28 Check Valve Valve Assembly 29 Spring Seat Cap Screws (2) 30 Spring Nuts and Washers (2) 31 Inlet Seat Lock Washers (2) 32 O-Ring Bracket 33 O-Ring Cap Screws (2) 34 O-Ring O-Ring 35 Alternate Plug* O-Ring 36 Bolts (2) 11 10 9 8 7 6 5 FIGURE 9 - ANTILOCK TRACTION ASSEMBLY EXPLODED VIEW 8 * Note: For new style ATR-1TM valves either both items 23 - 25, or item 35 will be present. 13 DISASSEMBLY PREPARATION FOR DISASSEMBLY 1. Remove all air fittings and plugs from the valve. Mark the relationship of the valve cover(3) to the body(4) and, if the valve is equipped with a mounting bracket(15), mark the relationship of the bracket to the cover and body(4). Mark the relationship of the electronic controller(1) to the cover(3). Then, depending on the internal configuration: 12a. Remove check valve seat(23), with o-rings(27 & 28). Remove o-rings(27 & 28) from the check valve seat. Then Remove the check valve(24), guide(25), and spring(26). Remove plug(35), with o-ring(34). OR, 12b. Remove the inlet seat(29) with o-rings(30 & 31), then remove o-rings(30 & 31) from the inlet seat(29). Remove the blend back piston(32) from the valve cover(3). [. . . ] Using lubricant to hold them in place, install the large and small sealing rings(18 & 17) on the cover(3). Install the o-ring(21) on the relay piston(19), then install the piston in the body(4). Note the relationship marks made prior to disassembly, then install the cover(3) on the body(4). Secure the cover on the body using the two, short cap screws(16). [. . . ]