BENDIX TCH-013-018 User's Manual
Contents
1. Diagnostics software BW2329 may be used to test the valve BENDIX TECHNICAL ASSISTANCE TEAM For direct telephone technical support call the Bendix Tech Team at 1 800 AIR BRAKE 1 800 247 2725 option 2 Monday through Friday 8 00 A M to 6 00 P M EST and follow the instructions in the recorded message or you may e mail techteam bendix com 2009 Bendix Commercial Vehicle Systems LLC 8 09 All Rights Reserved Printed in U S A wast2. the AT 3 solenoid valve on your vehicle is damaged perform the following inspection Follow all standard industry safety precautions including but not limited to those included in this document 1 Park the vehicle on a level surface and block the wheels and or hold the vehicle by means other than the air brakes 2 Drain the air pressure from all vehicle reservoirs 3 Locate the AT 3 solenoid valve s on the vehicle See Figure 2 4 With the valve mounted on the vehicle grasp the solenoid body with your hand and attempt to rock it checking for looseness of the crimp area If the solenoid body moves or rocks then the valve is damaged and should be replaced Replacement valves are available through any Bendix authorized parts distribution center Ifa replacement valve is needed be sure to follow the installation guidelines included with the valve to prevent damage to the replacement valve Continued Bulletin No TCH 013 018 Effective Date 8 24 2009 Subject Bendix AT 3 Valve Leakage Quick Release O From Trailer Valve TN ABS oF Control Valve Modulator Foot N Valve ABS Modulator Solenoid Valve Steer Axle ESP Supply FIGURE 2 EXAMPLE APPLICATIONS OF BENDIX AT 3 SOLENOID VALVE 6X4 TRACTOR WITH Cancels N A Page 2 of 3 AT 3 Solenoid Valve Drive Axle ATC ESP ABS fo Modulator Relay ey iB Valve Pressure Reducing xe ABS uae AT 3 Solenoid Valve M
3. his document are assembly torques and can be expected to fall off slightly after assembly Do not re torque after initial assembly torques fall For assembly use hand tools or torque limited drivers only Do not use impact driver to install any fittings Use a professional grade thread sealant on all air hose connections to this valve INSTALLATION Bendix approves two methods of installation a either install the valve onto the vehicle with OEM approved mounting bolts and then attach the fittings or b bench installation of the fittings using only the clamp location shown in Figure 1 before installing the valve on the vehicle 1 Clean and inspect all air lines and electrical harnesses for damage and replace as necessary Select one of the two fitting installation methods either install the valve onto the vehicle first or clamp as shown in Figure 1 using a bench vise for steps 2 and 3 2 With thread sealant applied connect the 1 4 18 NPT supply and delivery air lines to the valve to an initial torque of 15 3 ft lbs The fittings may be oriented clockwise no more than one 1 additional turn to its final position 3 For vehicles where the service exhaust port is used apply thread sealant to the hose connector and tighten to 18 ft lbs 25 Nem Where the fittings were installed using a bench vise now install the valve onto the vehicle Cancels N A Page 3 of 3 4 In cases where the service exhaust
4. m i Technical Bulletin Bendiy Bulletin No TCH 013 018 Effective Date 8 24 2009 Cancels N A Page 1 of 3 Subject Bendix AT 3 Valve Leakage When installing valve components on a vehicle including service replacement parts the installer needs to carefully follow the installation guidelines Not following these guidelines can lead to damage of the valve and reduced vehicle braking Bendix Commercial Vehicle Systems LLC has identified that some Bendix AT 3 solenoid valve bodies have become damaged and may result in leakage Bendix recommends that the crimp area of the AT 3 valve be inspected and replace the valve if this area has been found to have become loose See Figure 1 The Bendix AT 3 solenoid valve is a specialized air brake valve which may be used for several functions depending on the specific vehicle needs Most typically the AT 3 solenoid valve is used in the Bendix ATC automatic traction control and Bendix ESP stability systems See Figure 2 for typical applications of the Bendix AT 3 solenoid valve One or two of these valves may be installed on a vehicle l Permitted Crimp Area Clamp From Clamp Both Sides of Location Valve Body Mounting Hole Flange Solenoid Body oe A ey Electrical Clamp Location Never Clamp Using Solenoid Mounting Holes _ Body eee a Service gt Exhaust Port FIGURE 1 THE BENDIX AT 3 SOLENOID VALVE To identify if
5. odulator HSA Hill Start Aid TRACTION CONTROL ELECTRONIC STABILITY AND HILL START AID 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 1 Park the vehicle on a level surface apply the parking brakes and always block the wheels Always wear safety glasses 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 removed Where circumstances require that the engine be in operation EXTREME CAUTION should be used to prevent personal injury resulting from contact with moving rotating leaking heated or electrically charged components Do not attempt to install remove disassemble or assemble a component until you have read and thoroughly understand the recommended procedures Use only the proper tools and observe all precautions pertaining to use of those tools If the work is being performed on the vehicle s air brake system or any auxiliary pressurized air systems make certain to drain the air pressure from all reservoirs before beginning ANY work on the vehicle If the vehicle is equipped with an AD IS air dryer system or a dryer reservoir module be sure to drain the purge reservoir Following the vehicle manufacturer s recommended procedures deactiva
6. port is open to the atmosphere remember to install the valve with this port oriented downwards within 30 degrees of vertical Where used re install the snorkel tube retained during disassembly Be sure to check that the snorkel tube has a constant downward slope Consider installing a snorkel tube for open service ports in locations where road spray could enter the valve 5 Reconnect the wire harness to the solenoid using the identification made during the REMOVAL step Be sure to check that the harness has sufficient tie wraps etc to prevent any damage during vehicle operation 6 Test valve as outlined in Operational and Leakage Tests OPERATIONAL AND LEAKAGE TESTS 1 Chock the wheels fully charge the air brake system and apply the brakes 2 Coat the valve with a soap solution leakage of a one inch bubble in 3 seconds is permitted Where the service exhaust port is open to the atmosphere do not spray the soap solution directly into this port or snorkel tube where installed OPERATION TEST Since this valve is used for different functions depending on the vehicle consult the vehicle Operator s Manual for further information For vehicles where this valve is being used for ATC functions you may also refer to the Antilock Traction Controllers Service Data sheet visit www bendix com for operational test s for traction functionality In addition for certain vehicle air brake systems a PC with the Bendix ACom
7. te the electrical system in a manner that safely removes all electrical power from the vehicle Never exceed manufacturer s recommended pressures 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 Use only genuine Bendix replacement parts components and kits Replacement hardware tubing hose fittings etc 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 Automatic 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 Bulletin No TCH 013 018 Effective Date 8 24 2009 Subject Bendix AT 3 Valve Leakage The following is for reference only and should not be used in lieu of the instructions provided with the service replacement valve ASSEMBLY Note All torques specified in t
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