Meritor WABCO Air Brake Systems Workbook

1 TP-20141. Revised 01-04. Meritor WABCO . Air Brake Systems Workbook SECONDARY. CONTROL. TO SERVICE. RELAY. FROM PARK PRIMARY. VALVE TANK. SIDE VIEW. INSET (A) OPTION. PRIOR TO MARCH 1, 1998 FMVSS-121 REGULATIONS. ECU INVERSION VALVE AND QUICK RELEASE VALVE. (INCLUDES ANTI-COMPOUNDING). INSET (A) OR (B). xxxxx xxxxx xxxxx xxxxx PRIMARY. DELIVERY. SECONDARY. 001 20/98. 472 500 30. 0. MADE IN GERMANY. CONTROL. TO SERVICE. RELAY. FROM PARK. VALVE. INSET (B) OPTION. AFTER MARCH 1, 1998 FMVSS-121 REGULATIONS. SECONDARY. NEW INVERSION VALVE AND QUICK RELEASE VALVE. (INCLUDES ANTI-COMPOUNDING). SUPPLY COLOR KEY. (WET TANK) SUPPLY. SECONDARY. PRIMARY. PARK/EMERGENCY. PRIMARY ABS ELECTRICAL. TRAILER CONTROL. TRAILER SUPPLY. Introduction The purpose of an air Brake system on heavy duty vehicles is to convert air pressure to mechanical energy to activate the foundation brakes. Federal Introduction Motor Vehicle Safety Standard 121 dictates how this is to be done for over-the-road vehicles.

2 The purpose of this book is to help you construct Meritor WABCO Truck and Tractor air Systems . It will also help you identify air system components and understand how they relate to FMVSS-121. NOTE: The Systems described in this Workbook are generic air Brake Systems . Included in this book are: Truck Systems Air Supply Secondary Service Primary Service Parking Anti-Compounding Emergency (Prior to 3/1/98). Emergency (After 3/1/98) Air Brake System Color Key Tractor/Trailer Systems Tractor Parking & Trailer Air Supply COLOR KEY. Trailer Control SUPPLY. For additional information, call ArvinMeritor's Customer Service Center at 800-535-5560. SECONDARY. PRIMARY. PARK/EMERGENCY. ABS ELECTRICAL. TRAILER CONTROL. TRAILER SUPPLY. 1. Truck Air Supply System Air Supply System Truck SUPPLY. (WET TANK). 2. Truck Air Supply System Compressor_____. _____. _____. _____. Air Dryer_____. _____. _____. _____. _____. Supply Tank _____.

3 _____. _____. Pressure Relief Valve _____. _____. _____. Automatic/Manual Drain Valve_____. _____. _____. _____. Low Pressure Switch _____. _____. _____. _____. Governor _____. _____. _____. _____. _____. 3. Truck Secondary Service System Secondary Service System SECONDARY. SUPPLY. (WET TANK). 4. Truck Secondary Service System Pressure Control Check Valve _____. _____. _____. _____. Secondary Service Tank _____. _____. _____. Manual Drain Valve_____. _____. _____. Air Gauge_____. _____. Dual Foot Control Valve _____. _____. _____. Quick Release Valve _____. _____. _____. ABS Modulator Valve_____. _____. _____. Service Chambers _____. _____. _____. Manual Slack Adjusters_____. _____. Automatic Slack Adjusters _____. _____. 5. Truck Primary Service System Primary Service System SECONDARY. SUPPLY. (WET TANK). PRIMARY. 6. Truck Primary Service System One-Way Check Valve _____. _____. _____. Primary Service Tank _____.

4 _____. _____. Manual Drain Valve_____. _____. Air Gauge_____. _____. Dual Foot Control Valve _____. _____. _____. Service Relay Valve_____. _____. ABS Modulator Valve_____. _____. Spring Brakes _____. _____. Manual Slack Adjusters_____. _____. Automatic Slack Adjusters _____. _____. Two-Way Check Valve _____. _____. Stoplight Switch _____. _____. _____. 7. Truck Parking System Parking System SECONDARY. SUPPLY. (WET TANK). PRIMARY. 8. Truck Parking System Two-Way Check Valve _____. _____. _____. _____. _____. Dash Valve (Yellow Diamond Knob) _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. Quick Release Valve _____. _____. _____. _____. _____. Spring Brakes _____. _____. _____. _____. 9. Truck Anti-Compounding System Anti-Compounding System SECONDARY. SUPPLY. (WET TANK). PRIMARY. 10. Truck Anti-Compounding System Quick Release With Two-Way Check Valve _____.

5 _____. _____. _____. _____. _____. _____. _____. _____. _____. INLET A. CHECK _____. VALVE. DISC _____. _____. INLET. B _____. _____. DELIVERY _____. _____. _____. DELIVERY DELIVERY _____. _____. _____. _____. INLET OR. CONTROL 1. INLET OR _____. CONTROL 2. _____. _____. _____. _____. _____. 11. Truck Emergency System (Prior to March 1, 1998). Emergency System (Prior to March 1, 1998). SECONDARY. SUPPLY. (WET TANK). PRIMARY. 12. Truck Emergency System Emergency System Inversion Valve (Prior to March 1, 1998). Meritor WABCO Production Part Number 9718990010. Meritor WABCO Service Part Number RKN28030 _____. _____. _____. _____. _____. _____. CONTROL. INLET. _____. _____. DASH VALVE. SUPPLY. DELIVERY. TO SPRING. Brake . _____. PRIMARY. RESERVOIR. SUPPLY. _____. _____. _____. New Inversion Valve (Used After March 1, 1998). Meritor WABCO Production Part Number 9718990020. Meritor WABCO Service Part Number RKN28032 _____.

6 _____. _____. _____. PRIMARY. _____. SECONDARY. CONTROL. PORT. BALANCE. PORT _____. DELIVERY. PORT. _____. _____. SUPPLY. PORT. EXHAUST. CHECK. VALVE. _____. _____. _____. _____. 13. Truck Emergency System Complete (Prior to March 1, 1998). Emergency System Complete (Prior to March 1, 1998). SECONDARY. SUPPLY. (WET TANK). PRIMARY. 14. Truck Emergency System (After March 1, 1998). Emergency System (After March 1, 1998). SECONDARY. SUPPLY. (WET TANK). PRIMARY. 15. Truck Emergency System Complete (After March 1, 1998). Emergency System Complete (After March 1, 1998). SECONDARY. SUPPLY. (WET TANK). PRIMARY. 16. Truck Self Test (Prior to March 1, 1998). Self Test (Prior to March 1, 1998). SECONDARY. SUPPLY. (WET TANK). PRIMARY. 17. Truck Self Test (After March 1, 1998). Self Test (After March 1, 1998). SECONDARY. SUPPLY. (WET TANK). PRIMARY. 18. Truck Anti-Compounding/Emergency System Anti-Compounding/Emergency System SECONDARY.

7 SUPPLY. (WET TANK). PRIMARY. 20. Truck Anti-Compounding/Emergency System Inversion Relay Valve With Anti-Compounding _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. One-Way Check Valve _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. 21. Truck Anti-Compounding/Emergency System Anti-Compounding/Emergency System SECONDARY. SUPPLY. (WET TANK). PRIMARY. 22. Truck Anti-Compounding/Emergency System Test Anti-Compounding/Emergency System Test SECONDARY. SUPPLY. (WET TANK). PRIMARY. 23. Tractor Parking and Trailer Air Supply System Parking and Trailer Air Supply System Tractor SECONDARY. SUPPLY. (WET TANK). PRIMARY. 24. Tractor Parking and Trailer Air Supply System Module Dash Control (Yellow Diamond Knob & Red Octagon Knob) _____. _____. _____. _____. _____. _____. Quick Release With Two-Way Check Valve _____. _____.

8 _____. _____. _____. _____. (2 Line) Tractor Protection Valve_____. _____. _____. _____. _____. (3 Line) Tractor Protection Valve_____. _____. _____. _____. _____. (Trailer Supply) Gladhand _____. _____. _____. _____. _____. _____. 25. Tractor Trailer Control System Trailer Control System SECONDARY. SUPPLY. (WET TANK). PRIMARY. 26. Tractor Trailer Control System Hand Control Valve_____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. _____. (2) Two-Way Check Valves _____. _____. _____. _____. _____. _____. _____. _____. Stoplight Switch _____. _____. _____. _____. _____. _____. _____. _____. 27. Tractor Air System Complete Air System Complete SECONDARY. SUPPLY. (WET TANK). PRIMARY. 28. Tractor Self Test Self Test SECONDARY. SUPPLY. (WET TANK). PRIMARY. 29. Meritor WABCO Information contained in this publication was in effect at the time the publication was approved for Vehicle Control Systems printing and is subject to change without notice or liability.

9 ArvinMeritor Commercial Vehicle Systems 3331 West Big Beaver Road, Suite 300 reserves the right to revise the information presented or discontinue the production of parts described at Troy, MI 48084 USA any time. 800-535-5560. Copyright 2004 TP-20141. ArvinMeritor, Inc. Revised 01-04. All Rights Reserved Printed in the USA 16579/24240.