Slowly lost proportional boom functions. Now I am just black and white. Then second section only moves a little with remote. I have use the hand valve. Not sure if problems are separate issues or one. Just trying to get an idea of where to start looking for the problem! 2004 Schwing 39m/omnex computer/ vector remotes

Not sure if I am right. but I believe the valves are suported by air, if you lose presure on the valve they ain't working anymore. remember I had a problem like that one day wen my shut of valve was leaking

Same old questions.  What is pretension pressure?  Does it work with the hard cord?  Does it work manually?  Chances are its a card problem.  Best to give Mr. Seng at Schwing a call.

Hi Riverway

Call 888-SCHWING (724-9464) and ask for Seng. We'll get this fixed.