I have a problem with a customers FB20KT, It has the finger tip controll.
Some times the hydraulic doesent work. The pump motor starts and it sounds like when you tilt ore lift to the max. But nothing happens, If I press the emergensy botton and release it the hydraulics works again.

When the problem occur non of the four functions work, so its not a problem with a ft lever and since the pump motor starts im thinking that the problem has to be in the Hydraulic manifold? Can it be a valve wich is fixed open so the oil runs back to the tank? Even when it runs good I think its a strange screaming noice from the system..

Have anyone had the same problem? I would like to hear your thoughts on this!

Thanks.