News Release

For more information, contact: Barbara Gould Bendix Commercial Vehicle Systems LLC (440) 329-9609 barbara.gould@bendix.com or Kimberly Pupillo Marcus Thomas LLC (888) 482-4455 kpupillo@marcusthomasllc.com

FOR IMMEDIATE RELEASE

BENDIX REMINDS DRIVERS TO PROPERLY CHECK DASH VALVE TRIP PRESSURE ON PARKING BRAKES
ELYRIA, Ohio Sept. 14, 2009 Bendix Commercial Vehicle Systems LLC, the North American leader in active safety and brake system technologies, is reminding fleets, owneroperators, and drivers of the proper procedures for testing parking brake control trip pressure (the yellow button) and tractor protection control valves (the red button). Bendix works continuously with industry groups, legislative bodies, OEMs and fleets to develop best practices for testing and maintenance of air brake valves. These recommendations are being made in conjunction with the Commercial Vehicle Safety Alliances Brake Safety Training Week slated for the week of Sept. 13. While Bendix is not aware of any federal legislation that specifies the pressure at which the in-cab control valve yellow button must automatically trip to apply the vehicle parking brakes, the following procedure is recommended: Take all normal precautions when working on or around heavy vehicles. For more information, please see Bendix service data sheets or visit www.bendix.com Install an accurate pressure test gauge in the secondary service reservoir With the yellow button pressed in, charge the system to governor cutout and turn off the engine Open the manual drain valve on the primary service reservoir, allowing the reservoir to completely drain

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BENDIX REMINDS DRIVERS TO PROPERLY CHECK DASH VALVE TRIP PRESSURE ON PARKING BRAKES September 14, 2009/Page 2
Open the secondary reservoirs manual drain valve, creating a bleed rate of about 20 to 50 psi per minute as observed on the test gauge Monitor the pressure gauge, noting when the park control valve (the yellow button) automatically trips to the exhaust position > Note: The Bendix PP-DC and the Bendix MV-3 parking brake control valves are designed to automatically trip between 20 and 40 psi.
Bendix recommends the following test for verifying the operation of the tractor protection control valve (the red button): Take all normal precautions when working on or around heavy vehicles. For more information, please see Bendix service data sheets or visit www.bendix.com Install an accurate pressure test gauge in the primary and secondary service reservoirs With both the red and yellow buttons pressed in, charge the system to governor cutout and turn off the engine Disconnect the service or control (blue) line to the trailer leaving the supply or emergency (red) line coupled to a trailer or suitable sealed (dummy) coupling Take care to restrain the service coupling and direct the flow safely away while making and holding a full-service brake application via the foot valve As the service application is vented through the open glad hand, the service system pressure drops until the tractor pressure control valve (the red button) trips, shutting off the leak through the open coupling Record the pressure in the service reservoirs at this point and disconnect the trailer supply coupling to verify that the supply or emergency (red) coupling has been vented to atmosphere, activating the trailer emergency feature
The above recommendation is based on the Bendix interpretation of Federal Motor Carrier Safety Regulations; Title 49; Section 393.43 (b) regarding loss of the charging source, supply reservoir or service reservoirs. See Bendix Technical Bulletin TCH-003-051 (Bendix Dash Valve Trip Pressure/DOT Inspections) online in the Troubleshooting segment of the Document Library at www.bendix.com.
About Bendix Commercial Vehicle Systems LLC Bendix Commercial Vehicle Systems, a member of the Knorr-Bremse Group, develops and supplies leading-edge active safety technologies, air brake charging, and control systems and components under the Bendix brand name for medium- and heavy-duty trucks, tractors, trailers, buses, and other commercial vehicles throughout North America. An industry pioneer, employing more than 2,000 people, Bendix is driven to deliver solutions for improved vehicle performance, safety, and overall operating cost. Bendix Commercial Vehicle Systems is headquartered in Elyria, Ohio, with manufacturing plants in Acua, Mexico; Bowling Green, Ky.; Huntington, Ind.; and Vancouver, British Columbia, Canada. For more information, call 1-800AIR-BRAKE (1-800-247-2725) or visit www.bendix.com.

Accelerator Control, Air. SeeTreadle Valve (E-8P) Accelerator Control, Electronic 635 Air Dryer 269 Air Filter. SeeIntake / Exhaust Air Restriction Indicator 603 Alternator Belt Tensioner 729 Cable Tests 725 Removal 727 Antilock Brake System (ABS), Air ABS Modulator Valve (M-32QR) 285 EC-60 Controller 361 WS-20 Wheel Speed Sensor 287 Antilock Brake System (ABS), Hydraulic ABS Modulator 483 Electronic Control Unit (ECU) 486 Wheel Speed Sensors 484 Appendixes Using 17, 18 Axle & Suspension, Front 63 AirTek Front Suspension 66 Appendix1: Hendrickson Airtek & Softek 69 SofTek Front Suspension 64 Axle & Suspension, Rear 187 Appendix 1: Hendrickson Comfort Air 197 Rear Axle & Suspension Maintenance Chart 188 Rear Spring Suspension 190 Removal 189 Body Body Electrical 715. See alsoElectrical; See alsoElectrical Schematics Body Glass 909 Door Panel Glass Replacement 921 Rear Vision Glass Replacement 910 Transist Window Glass Replacement 912 Body Tie Downs 60 Entrance Door 914 Booster 481 Brakes, Air 249 20L Front Brake Chambers 295 Air Compressor 267 Air Dryer 269 AD-9 Air Dryer 307 AD-IP Air Dryer 327 Air Tanks 273 Appendix 1: Bendix AD-9 Air Dryer 307 Appendix 2: Bendix AD-IP Air Dryer 327 Appendix 3: Bendix PP-DC Park Control Valve 347 Appendix 4: Bendix SR-7 Spring Brake Modulating Valve 353 Appendix 5: Bendix EC-30 ABS Controller 361 Appendix 6: Meritor MM 4B, Automatic Slack Adjuster 405 Appendix 7: Haldex Automatic Brake Adjusters 461 Brake Interlock, Air 264 Brake Shoes & Drums 304 D2 Governor 267 E-8P Treadle Valve 275 EC-30 ABS Controller 361 Flow Diagrams 253 M-32QR ABS Modulator Valve 285 PP-DC Park Control Valve 281, 347 QR-1H Quick Release Valve 279 R12H Relay Valve 277 Rear Brake Chambers 297 Releaseing For Towing 36 Slack Adjusters 301, 405, 461 SR-7 Spring Brake Modulating Valve 283, 353 WS-20 ABS Wheel Speed Sensor 287
Belts Routing Diagram 235, 236 Tensioner 729 Blue Bird Blue Bird Distributor 13 Parts Sales 14 Training 14 Warranty 14

service manual

Brakes, Hydraulic 477 ABS Modulator 483 Appendix 1: Bosch Hydro-Max 505 Appendix 2: Meritor MM39, Hydraulic ABS 535 Appendix 3: Meritor MM 2075, Quadraulic Calipers 565 Booster 481 Brake Interlock, Hydraulic 495 Brake Pads 488 Brake Rotors 489 Brakes Maintenance Chart 479 Calipers 487 Electronic Control Unit (ECU) 486 Master Cylinder 480 Parking Brake 501
ECU (ABS Controller) Air Brakes 289, 361 Hydraulic Brakes 486 Electrical. See alsoMultiplex System Alternator Cable Tests 725 Alternator Performance Test 724 Charging System 723 Doran Warning Light Monitor 715 Starter 730 Ignition / Run Test 732 Low Voltage Test 733 Slow Cranking 734 Electrical Schematics Body 717 Chassis 737, 753 Using 19 Engine Engine / Transmission Removal 229 Engine Trim 235, 236 Exhaust System. SeeIntake / Exhaust
Calipers 487 Chassis Chassis Electrical 723. See alsoChassis: Chassis Electrical; See alsoElectrical Schematics; See alsoMultiplex System Compressor 267 Contacts Blue Bird TechPubs 16 NHTSA 15 Cooling System 587 Coolant Filter 593 Fan Clutch 597 Shutters 600
Fan Clutch 597 Frame Chassis Frame 57 Body Tie Downs 60 Huck Fasteners 57 Fuel System 625 Accelerator Control, Electronic 635 Fuel Filters 628 Fuel Level Sending Unit 629 Fuel Tank 632 Throttle Position Sensor 635
Dimensions 30 Doors Door Panel Glass Replacement 921 Door Panels 919 Electric Door Opener 918 Interlink Adjustment 914 Manual Door Control 916 Outward Opening Entrance Door 914 Pneumatic Door Opener 917 Doran Warning Light Monitor 715 Driveline 248 Dryer, Air 269
General Specifications Body 23 Chassis 21 Dimensions 30 Fastener Grades 31 Glass 909 Door Panel Glass Replacement 921 Rear Vision Glass Replacement 910 Split Sash Window Glass Replacement 910 Transit Window Glass Replacement 912 Windshield Glass Replacement 909 Governor, Air Compressor (D-2) 267
Maintenance Schedules 41 Master Cylinder 480 Modulator, ABS Hydraulic 483 MPX Module 673 Muffler. SeeIntake / Exhaust Multiplex System 671 Diagnostic Mode 676, 703 Feedbacks 675 Input & Output Tables 677, 682 How to read 677 Ladder Logic How to read 678, 714 Ladder Logic Symbols 679 MPX Module 673 MPX Simulator 681, 708 Sleep Mode 676 Troubleshooting Example 708
Instruments 641 Appendix 1: Instrument Cluster 645 Intake / Exhaust 603 Air Restriction Indicator 603 Exhaust System 608, 623 Muffler Removal 620 Interlock For Air Brakes 264 For Hydraulic Brakes 495
Pads, Hydraulic Brake 488 Panels & Compartments General Specs 23 Park Control Valve (PP-DC) 281, 347 Parking Brake For Hydraulic Brakes 501 PDU 750 Perry Water Filter 593 Pulse Width Modulation 635
Ladder Logic. SeeMultiplex System
Quick Release Valve (QR-1H) 279
Relay Valve (R-12H) 277 Rotors, Hydraulic Brake 489

Wheel Speed Sensors, ABS Air 287 Hydraulic 484 Windows Rear Vision Glass Replacement 910 Split Sash Window and Glass Replacement 910 Transit Sliding Windows 912 Windshield Glass Replacement 909
Safety Service Precautions 34 Seating 923 Drivers Seat 923 Passenger DOT Seats 925 Seat Belts & Shoulder Harnesses 927 Track Mounted Passenger Seats 926 Shutters 600 Slack Adjusters 301 Haldex 461 Meritor 405 Spring Brake Modulating Valve (SR-7) 283, 353 Starter 730. See alsoElectrical; See alsoElectrical Schematics; See alsoMultiplex System Removal 736 Steering 835 Steering Column & Shaft 840 Steering Gear 841 Steering Pump 846 Stop Arms 922
Tanks, Air 273 TechReference CD Adobe Acrobat & PDFs 18 Contents of 18, 19 Using 18 Towing Jacking & Towing Procedure 36 Transmission 237 Cooler 238 Filter 238 Maintenance Schedule 238 Planetary Gears & Clutches 238 Removal 242. See alsoEngine / Transmission Removal Shift Cable Removal 246 Shifter Removal 245 Torque Converter 237 Treadle Valve (E-8P) 275