BENDIX BW1933 User Manual

1Bendix® R-12DC™ Relay Valve with Biased Double CheckDESCRIPTIONThe relay valve in an air brake system functions as a relaystation to speed up the app

2OPERATIONAPPLICATIONUnder normal conditions, the internal biased double checkvalve assures that the primary service signal controls thevalve. Air pr

3BRAKECHAMBERSMAINTAINAPPLICATIONFIGURE 5 - R-12DC™ BALANCE POSITIONAIR PRESSUREABOVE RELAYVALVE ISEXHAUSTEDHEREBRAKECHAMBERSRELEASEDFIGURE 6 - R-12DC

4*Crack Pressure is the amount of controlpressure required by the valve to initiateair delivery. For Crack pressures otherthan 4 psi, a differential

55. Remove piston (9) from the body (10) and retain for reuse.6. Remove and discard o-ring (8) from piston (9).7. Depress and hold the exhaust cover a

6ABS/TRACTIONWARNINGINDICATORSDIAGNOSTICCONNECTIONENGINE ECUBRAKECHAMBERAIR DRYERSUPPLYRESERVOIRANTI-COMPOUNDINGSPRING BRAKERELAY VALVEFRONT AXLESERVI

7GENERAL SAFETY GUIDELINESWARNING! PLEASE READ AND FOLLOWTHESE INSTRUCTIONS TO AVOIDPERSONAL INJURY OR DEATH:When working on or around a vehicle, the

8BW1933 © 2007 Bendix Commercial Vehicle Systems LLC. All rights reserved. 3/2007 Printed in U.S.A.