BENDIX BW1578 ユーザーズマニュアル

1.  Proceed as for Bendix

®

 PP-1

®

 valve through Step 3.

2.  Connect a modulated source of air pressure to the pilot 

air inlet. With the button pushed in (applied position) 
with 125 psi supply pressure and a gradually increasing 
pressure applied at the pilot air port the valve should 
move to the release position with a pilot pressure of 
not more than 18 psi. Leakage in this mode should not 
exceed a 1” bubble in 3 seconds at the exhaust port 
and a 1” bubble in 5 seconds at the plunger stem.

1.  Proceed as for PP-1

®

 valve through Step 1.

2.  With the button pulled out (exhaust position), leakage 

at the brake valve port or at the plunger stem should 
not exceed a 1” bubble in 5 seconds.

BW1578  © 2011 Bendix Commercial Vehicle Systems LLC, a member of the Knorr-Bremse.Group  •  5/2011  •  All rights reserved.

3.  Push the button in. Supply pressure should be present 

in the delivery volume. Leakage at the exhaust port or 
around the plunger stem should not exceed a 1” bubble 
in 5 seconds.

4.  Pull the button out and apply supply pressure at the 

brake valve port. Supply pressure should be present 
in the delivery volume and leakage at the exhaust port 
should not exceed a 1” bubble in 5 seconds.

Note: If any of the above push-pull valves do not function 
as described or if leakage is excessive, it is recommended 
they be returned to our nearest authorized distributor for a 
service new or remanufactured replacement.