4
BW2591 © 2006 Bendix Commercial Vehicle Systems LLC. All rights reserved. 11/2006 Printed in U.S.A.
4. Charge the air system to governor cutout. While
observing both test gauges, make, hold and release
several brake applications at various pressures.
Delivery port (22) pressure should rise to the pressure
indicated below (+/- 5 psi) and promptly return to zero
pressure upon release of the brake valve.
Primary Control (41)
Delivery port (22)
20 psi
20 psi
40 psi
40 psi
60 psi
60 psi
100 psi
100 psi
5. UNPLUG the line leading to the secondary control port
42.
6. Remove the gauge from the line leading to the primary
control port 41. Remove and PLUG the line leading to
the primary control port 41.
7. Install the gauge in the line leading to the secondary
control port 42 and reinstall the line in port 42.
8. Charge the air system to governor cutout. While
observing the test gauges installed in the secondary
control line leading to port 42 and delivery port 22 make,
hold, and release several brake applications at various
pressures. Delivery port 22 pressure should rise to the
pressure indicated below (+/- 5 psi) and promptly return
to zero pressure upon release of the brake valve.
Secondary Control (42)
Delivery port (22)
20 psi
10 psi
40 psi
30 psi
60 psi
50 psi
100 psi
95 psi
9. Remove the gauge from the secondary control line
leading to port 42.
10. UNPLUG and reconnect the primary control line leading
to port 41.
11. Remove the gauge from the line leading to the delivery
port 22.
12. Make certain all lines and fi ttings are returned to their
original pretest positions and tightened suffi ciently to
prevent leakage. Make and hold a full brake application
and test all lines and fi ttings for leakage and note that
the Dual Relay Valve is operating correctly.
If the valve does not function as described or if leakage is
excessive, replace the Dual Relay Valve with a genuine
Bendix replacement.
