User manual BENDIX A-18 TRAILER ABS

[. . . ] ® Bendix® A-18TM Trailer ABS (Gen 4TM and Gen 5TM ABS) GEN 4TM AND GEN 5TM ABS INTRODUCTION This manual describes the Bendix® A-18TM trailer ABS system and contains two primary sections: · · Installation Service FIGURE 1 - ABS Controller Assemblies Table of Contents Power Requirements for ABS . 15 Install the ECU/Relay Valve and Stand Alone Relay Valve . 17 Install the Trailer Mounted Warning Light . 23 Use of Hand Held Tool for Configuration . [. . . ] Install the trailer-mounted ABS Warning Lamp. Perform the End-of-Line Checkout. Sensor Friction Sleeve ABS Sensor Bushing Push FIGURE 16 - Wheel Speed Sensor Components Sensor FIGURE 15 - Speed Sensor Installation 14 Install the ECU/Relay Valve and Stand Alone Relay Valve In all installations, the ECU/Relay Valve assembly appears as Relay Valve "A" in the diagrams. The Stand Alone Relay Valve is identical to the ECU/Relay Valve except it does not have the ECU and ECU mounting bracket. The relay valves may be installed on the reservoirs or a frame member. The Stand Alone Relay Valve is the second relay valve in systems with two relay valves and is labeled Relay Valve "B" in the diagrams. Leak and Performance Test 1. Park vehicle on level surface and block wheels. Release parking brake and fully charge the air system (governor cut out point). Apply the service brake several times, then hold and check for prompt brake air chamber application and release at all wheels. Coat outside of relay valve with a soap solution. NOTE: If a sluggish response is noted at all wheels, inspect for kinked or obstructed air line leading to or from valve. Increase system air pressure to governor cut-off. With brakes released, coat exhaust port of relay valve with a soap solution. Leakage of a 1" bubble in 5 seconds is permissible. Leakage of a 1" bubble in 3 seconds is permissible. Pipe Fitting Torques Refer to the following torque specifications when installing pipe nipples. Torques are for NPT threads with thread sealant applied. Contamination by thread tape can cause component failure. Tighten pipe nipples as follows: · · With Thread Sealant - Finger tight plus 1 1/2 turns Without Thread Sealant - Finger tight plus 2 turns Frame Member 3/4" Heavy Wall Steel Pipe Nipple ECU Relay Valve ECU Reservoir Tank FIGURE 18 - Frame Mounted Relay Valve Relay Valve FIGURE 17- Tank Mounted ECU/Relay Valve 15 Install the Inline Power Connector The inline power connector is on the end of the main ABS harness and connects the ABS system to the trailer electrical system. Install the Main ABS Harness 1. Install the ECU connectors as follows: Standard: Plug the grey harness connector into the ECU connector labeled "X1". The connector is keyed and can only fit in one direction. Plug the black harness connector into the ECU connector labeled "X2". Basic: Plug the green harness connector into the ECU connector labeled "X1". This connector is also keyed and is the only connector on the ECU. [. . . ] Indirectly Controlled Wheel -- A wheel whose braking is adjusted in response to wheel speed information from an adjacent wheel. A control method in which a wheel is controlled at optimum slip, a point where retardation and stability are maximized. The brake pressure that is best for the wheel in question is directed individually into each brake chamber. A method of controlling the opposite sides of a steer axle during ABS operation so that torque steer and stopping distance are minimized. [. . . ]