BENDIX BW2710 User's Manual
Contents
1. but must be inspected for proper operation as a part of routine vehicle maintenance No two vehicles operate under identical conditions as a result maintenance intervals may vary Experience is a valuable guide in determining the best maintenance interval for air brake system components At a minimum the SDS 9600 valve should be inspected every 6 months 2 or 1500 operating hours whichever comes first for proper operation Should it not meet the elements of the operational tests noted in this document further investigation and replacement of the valve may be required REMOVAL Secure the vehicle with spring brakes or blocks Drain the reservoir which supplies the SDS 9600 valve Mark and disconnect the connecting air lines Remove the screws that secure the valve to the trailer frame rail Remove the valve INSTALLATION Typical system schematics for the SDS 9600 valve are shown in Figures 3 and 4 Inspect the mounting hardware and replace if necessary Check connecting air lines for integrity and foreign material replace if necessary Re connect the air lines Check the operation of valve by charging system and performing the service check as described in this manual TO AUXILIARY CONNECTOR ATC SOLENOID i CONTROLLER TRAILER SUSPENSION DUMP VALVE PR 3 PRESSURE LEVELING PROTECTION VALVE VALVE INTEGRATED CHECK VALVE FIGURE 3 SYSTEM DIAGRAM PRESSURE PROTECTION VALVE WITH INT2. 3 8 NPT Saal DELIVERY PORT RESERVOIR PORT EXHAUST PORT SHOWN WITH OPTIONAL SILENCER SD 03 4520 SUPPLY PORT 3 3 NPT DELIVERY PORT EXHAUST PORT SHOWN WITH DIAPHRAGM FIGURE 7 BENDIX SDS 9600 TRAILER SUSPENSION DUMP VALVE PORT IDENTIFICATION DESCRIPTION The SDS 9600 trailer suspension dump valve is utilized to assist spread axle trailers with air suspension negotiate tight turns at low speeds by limiting torsion forces on the rear trailer axle These forces can damage tires frames and suspension components When activated the SDS 9600 trailer suspension dump valve exhausts dumps a portion of the air out of the rear trailer axle suspension taking the weight off of that axle and transferring it to the forward trailer axle The trailer can then pivot on the forward trailer axle in a turn Maintaining a portion of the air in the rear axle reduces damage to the air suspension saves on suspension and systems air reduces time needed to re inflate the system when required and reduces tire chattering all of which may occur if all of the air is exhausted from the suspension The SDS 9600 trailer suspension dump valve then returns air to the rear axle Suspension upon driver input deactivated or when vehicle speed is in excess of 10 mph The Bendix SDS 9600 trailer suspension dump valve is a pilot operated normally open three way valve with a high capacity exhaust inversion control and
3. EGRATED CHECK VALVE TO AUXILIARY CONNECTOR sip cnn een ee ae sen A SOLENOID CONTROLLER TRAILER S SUSPENSION 1 DUMP VALVE PR 4 PRESSURE LEVELING PROTECTION VALVE VALVE SINGLE CHECK VALVE FIGURE 4 SYSTEM DIAGRAM PRESSURE PROTECTION VALVE WITHOUT INTEGRATED CHECK VALVE SERVICE CHECKS LEAKAGE Build the air system to governor cutout Shut off the engine Using a soap solution check all lines and fittings leading to and from the SDS 9600 trailer suspension dump valve for leakage and integrity Repair any excessive leaks exceeding a 1 bubble in 5 seconds before restoring vehicle to service GENERAL The SDS 9600 trailer dump system can be tested for full functionality by using Bendix ACom Diagnostics Software Bendix ACom Diagnostics is a PC based software program and is designed to meet RP 1210 industry standards This software provides the technician with access to all the available ECU diagnostic information and configuration capability including e ECU information e Diagnostic trouble codes and repair information e Configuration ABS ATC and more e Wheel speed information e Perform component tests e Save and print information When using ACom Diagnostics software to diagnose the SDS 9600 valve refer to the ACom 1 0 Auxiliary number 1 port For more information on ACom Diagnostics software or RP1210 compliant tools go to www bendix com or vis
4. delivery pressure hold feature The function of the valve is to apply delivery pressure to the rear axle of a spread axle trailer Suspension and then to exhaust the delivery pressure through a high capacity exhaust upon the input of a control signal Upon exhaust an internal mechanism of the trailer Suspension dump valve stops the exhausting of air and holds the delivery pressure at a minimal pressure Porting is as follows 2 3 8 inch NPT delivery ports 1 4 inch NPT control port 1 4 inch NPT supply port 1 4 inch NPT reservoir Exhaust port with Diaphragm or optional 3 8 inch NPT port 1 1 1 1 FRAME RAIL FRAME RAIL SPREAD AXLE TRAILER 2 MINIMUM CLEARANCE 2 MINIMUM CLEARANCE 3 8 16 X 50 EXHAUST FIGURE 2 MOUNTING THE SDS 9600 TRAILER SUSPENSION DUMP VALVE OPERATION MOUNTING ORIENTATION The SDS 9600 trailer suspension dump valve is mounted to the trailer frame rail or cross member It is preferred that the valve be mounted on the backside of a cross member with the exhaust port facing down Mounting on the top side of a cross member is acceptable provide the exhaust port is facing rearward on the vehicle Never mount the valve with the exhaust port facing upwards The valve should have at least 2 inches of clearance between the exhaust port and any other surface Refer to Figure 2 PREVENTIVE MAINTENANCE Important The SDS 9600 control brake valve is not serviceable
5. it your local authorized Bendix parts outlet 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 2 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 3 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 4 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 5 Following the vehicle manufacturer s recommended procedures deactivate the electrical system in a ma
6. nner that safely removes all electrical power from the vehicle 6 Never exceed manufacturer s recommended pressures 7 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 8 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 9 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 10 Prior to returning the vehicle to service make certain all components and systems are restored to their proper operating condition 11 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 BW2710 2008 Bendix Commercial Vehicle Systems LLC All rights reserved 5 2008 Printed in U S A 5
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