BENDIX BW1613 User's Manual
Contents
1. Install the piston assembly into the cavity making sure the spring 9 mates with the bore of the piston Install the cap 5 with o ring 6 FINAL ASSEMBLY 1 Install the cover plate 3 onto the valve body and retain with the six Phillips head screws Torque to 30 in Ibs Attach the red 1 and yellow 2 buttons onto the threaded stems of the spools making sure that they are oriented correctly as noted in Step 1 of Disassembly procedure Reattach the MV 3 valve to the dash using the hardware removed in Step 2 of Disassembly If air lines were removed during disassembly reconnect to ports marked during disassembly When reconnecting threaded ports use a liquid thread sealing compound attach the air line until it is hand tight and then turn approximately one and a half turns further or using a maximum of 10 ft Ibs torque Note overtorquing will crack the port SERVICE TEST Repeat the Operational Testprocedures Test drive vehicle at slow speed in a safe area prior to placing it back into service For additional information refer to Technical Bulletin Bendix Dash Valve Trip Pressure TCH 003 051 BW1613 2012 Bendix Commercial Vehicle Systems LLC a member of the Knorr Bremse Group 3 2012 All Rights Reserved2. SPRING BRAKES QUICK RELEASE VALVE EN IS jl TO TRACTOR SPRING BRAKES TRACTOR TRACTOR SERVICE SERVICE RESERVOIR 1 RESERVOIR 2 FIGURE 2 INITIAL CHARGING OR SYSTEM PARK OPERATION NORMAL OPERATING POSITION FIGURE 4 During initial charge with the system completely With both buttons pushed in air is supplied to the trailer discharged both buttons are out Figure 2 When system and to the tractor spring brakes all brakes are released pressure reaches 65 psi the red button trailer supply may be pushed in Figure 3 and should stay in charging the trailer system and releasing the trailer brakes The yellow button may now be pushed in which will supply air to the tractor spring brakes releasing them RED jun TRACTOR PROTECTION TO TRAILER SPRING QUICK RELEASE T i VALVE maw de TO TRACTOR SPRING BRAKES TRACTOR TRACTOR SERVICE SERVICE RESERVOIR 1 RESERVOIR 2 FIGURE 3 TRAILER CHARGED 8 TRACTOR PARKED RED Il I TRACTOR PROTECTION VALVE TO TRAILER SPRING BRAKES QUICK RELEASE TO TRACTOR SPRING BRAKES TRACTOR TRACTOR SERVICE SERVICE RESERVOIR 1 RESERVOIR 2 FIGURE 4 NORMAL OPERATING POSITION TRACTOR amp TRAILER ACTUATION OF TRAILER PARKING OR SYSTEM PARK FIGURE 2 EMERGENCY BRAKES FIGURE 5 With both buttons in for normal r
3. drop below 100 psi Repeat the test for decreasing primary reservoir pressure The secondary reservoir pressure should not drop below 100 psi 8 Ifthe MV 3 valve fails to operate as described replace or repair it using genuine Bendix parts 9 Close all reservoir drain cocks and deliberately caused leakage points before placing the vehicle back into service CAUTION Note the orientation of the buttons in relation to the valve to be sure they will be replaced properly A TO AVOID PERSONAL INJURY OR DEATH When working on or around a vehicle the following guidelines should be observed AT ALL TIMES Park the vehicle on a level surface apply the parking brakes and always block the wheels Always wear personal protection equipment Stop the engine and remove the 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 b
4. is reduced to approximately 20 to 45 psi the red button trailer supply valve must pop out applying the emergency or parking brakes on the trailer If the red button is held in manually and the pressure decreases to approximately 20 psi a trip piston within the Bendix MV 3 valve will move upward exhausting the trailer supply effecting the required non override feature OPERATIONAL TEST 1 With supply pressure at 120 psi push the red button in The button must stay in 2 Slowly reduce pressure in both service reservoirs The red button must pop when supply pressure drops to 20 to 45 psi Note The yellow button must not pop out before the red button GENERAL SAFETY GUIDELINES WARNING PLEASE READ AND FOLLOW THESE INSTRUCTIONS 3 Hold the red button in and continue to reduce pressure in all service reservoirs Air must start to escape from the exhaust port when the trailer supply line pressure reaches 20 psi minimum 4 Release the red button and rebuild the supply pressure to at least 120 psi Push in the yellow button the yellow button must remain in 5 Charge the system to 120 psi and push both buttons in Pull the red button out The yellow button must remain in 6 Push the red button in and pull the yellow button out The red button must pop out almost instantaneously 7 Build both service reservoirs to 120 psi Decrease the pressure at the secondary reservoir The primary reservoir pressure should not
5. LO lt t gt A Q Q N Bendix MV 3 Dash Control Module DUAL CIRCUIT SUPPLY CHECK VALVE MOUNTING HOLES 4 MOUNTING gt PLATE j AUXILIARY PORT OPTIONAL TRACTOR TRAILER DELIVERY SECONDARY DELIVERY SUPPLY 1 SUPPLY EXHAUST PRIMARY FIGURE 1 BENDIX MV 3 DASH CONTROL MODULE DESCRIPTION The Bendix MV 3 dash control module is a two button push pull control valve housed in a single body that accommodates dual circuit supply through a double check valve The MV 3 valve can duplicate the functions of any existing two or three valve push pull system and has the advantages of reduced plumbing EXHAUST SUPPLY 1 PRIMARY The MV 3 valve body plungers and spools are made out of a non metallic non corrosive material All air connections are at the back of the valve with the exception of the optional auxiliary port as shown in Figure 1 The MV 3 valve provides the following functions 1 Tractor Protection 2 Trailer Service Air Control AUXILIARY DELIVERY PORT TRACTOR DELIVERY 3 System Park 4 Trailer Park Only 5 Trailer Charge with Tractor Spring Brakes Applied Tractor Park Only 6 Primary amp Secondary Reservoir Connections TRAILER DELIVERY SUPPLY 2 SECONDARY BOTTOM VIEW 7 Dual Supply Reservoir Isolation via the Check Valve RED 1 fow TRACTOR PROTECTION VALVE TO TRAILER
6. ide spool 14 over the threaded end of one of the plungers 15 Remove the o ring 16 from the guide spool 14 Remove o rings 18 19 amp 20 and the exhaust seal 21 from the plunger 8 Repeat Step 7 on the remaining spool assembly 9 Remove the retaining ring 22 from the cavity of the MV 3 valve body that contains the dual circuit supply valve 10 Pull the check valve seat assembly 23 from the valve Remove the two o rings 24 and 13 from the check valve assembly Remove the check valve 17 from the MV 3 valve body CLEANING amp INSPECTION The non metallic components which comprise most of the parts of the MV 3 valve should not be immersed in any solvent type cleaner Old lubricant should be wiped out VALVE BODY with a clean dry cloth If any visible damage to the body or the spools can be detected the complete unit must be replaced FIGURE 6 BENDIX MV 3 DASH CONTROL MODULE PARTS EXPLODED VIEW ASSEMBLY DUAL CIRCUIT SUPPLY VALVE 1 Lubricate all o rings and bores with silicone lubricant Bendix piece number 291126 or Dow Corning 55 M Place the check valve 17 into its seat in the body with its flat surface facing upward If necessary reach into the body to make sure the valve is seated evenly in the bore Install o rings 24 amp 13 onto the check valve 23 Then install the assembly into its cavity in the Bendix MV 3 valve body 4 Install the snap ring 22 making sure it is f
7. rake 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 a Bendix AD IS air dryer system a Bendix DRM dryer reservoir module or a Bendix AD 9si air dryer be sure to drain the purge reservoir Following the vehicle manufacturer s recommended procedures deactivate the electrical system in a manner that safely removes all electrical power from the vehicle A A 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 brand 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 indica
8. tor 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 The power MUST be temporarily disconnected from the radar sensor whenever any tests USING A DYNAMOMETER are conducted on a Bendix Wingman Advanced equipped vehicle You should consult the vehicle manufacturer s operating and service manuals and any related literature in conjunction with the Guidelines above DISASSEMBLY OF THE BENDIX MV 3 VALVE 1 Remove the red 1 and yellow 2 buttons from the stems of the spools on the Bendix MV 3 valve by turning in a counterclockwise direction 2 Remove and save the mounting hardware from the four corners of the cover plate 3 3 If removing the valve from the vehicle remove and identify the air lines from the back of the valve 4 Remove the six Phillips head screws 4 from the cover plate 3 and carefully remove the cover plate 3 from the valve 5 Remove the cap 5 and o ring 6 from the bore of the tripper valve Remove the piston 7 spring 8 spring 9 and check valve 10 These parts will all fall out of the cavity of the MV 3 valve by tilting the body forward Remove the o ring 11 from its groove on the piston 7 6 Remove the two main spools from the body of the MV 3 valve by grasping the stem and pulling firmly Remove the two springs 12 from the bottom of each spool cavity 7 Pull the gu
9. ully seated in its groove SPOOLS 1 Install o rings 18 19 amp 20 and the exhaust seal 21 onto the stem of the plungers 15 CAUTION The exhaust seal 21 must be installed so that its beveled surface mates with the beveled surface of the plunger Figure 7 2 Install the o ring 16 onto the guide spool 14 Install the guide spool assembly over the threaded end of the plunger 15 and press down firmly until it contacts the plunger flange W 15 PLUNGER 19 O RING MATING EXHAUST SEAL BEVEL J lt gt tam Ye El 20 O RING 21 EXHAUST SEAL FIGURE 7 PLUNGER AND EXHAUST SEAL Install the spring 12 over the boss in the bottom of the spool cavity in the body of the MV 3 valve Place the spool assembly into the body keeping the spool square to the body press and turn the stem until the spool is fully seated in its cavity Note the assembly is keyed and may only be installed one way Repeat Steps 1 2 and 3 with the remaining components for the opposite spool SHUTTLE AND CHECK VALVE 1 5 Install the o ring 11 into its groove on the piston 7 and o ring 6 onto the cap 5 Install the spring 8 on the piston 7 and spring 9 on the boss of the check valve 10 Install the spring and check valve into its cavity in the body of the MV 3 valve tapered end of check valve to enter cavity first Make sure the spring 9 is centered in the bore
10. un modes the parking To actuate only the trailer brakes pull out the red button brakes on both the tractor and trailer may be actuated exhausting the trailer supply line The trailer brakes are Py pulling the yellow parking brake button out which now applied either by emergency air or spring brakes exhausts the air from the tractor spring brakes and depending on the type of trailer system simultaneously causes the red trailer supply button to pop out applying the trailer brakes This complies with Federal Regulations that one control must apply all the parking brakes on the vehicle RED 1 yauow TRACTOR PROTECTION VALVE TO TRAILER E SPRING Fi BRAKES a QUICK RELEASE VALVE TO TRACTOR SPRING BRAKES TRACTOR TRACTOR SERVICE SERVICE RESERVOIR 1 RESERVOIR 2 FIGURE 5 TRAILER PARKED TRACTOR RELEASED TRAILER CHARGE FIGURE 3 If both buttons are out when parking the combination vehicle and it is desired to recharge the trailer leaving the tractor spring brakes applied the red button may be pushed in repressurizing the trailer supply line This mode might also be used to park a combination vehicle with air actuated emergency brakes on the trailer to provide demonstrated parking capability with tractor spring brakes only AUTOMATIC APPLICATION With both buttons in the normal run configuration if the supply pressure to the push pull valves
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