Have had an issue with an MCE x Bucher Hydraulics setup for a couple of years now and its starting to become a much bigger problem now.
The lift is a 3 stage telescopic cylinder acting on a cylindrical glass car that serves 3 floor with about 20m travel. We changed the ram seals 5 years ago and it was running ok until about 2 years ago when it just started relevelling up and down at the top floor. This only happened when people would enter or leave the car and then it would sit there relevelling up and down 10mm above and 10mm below floor level until it received it's homing floor call down to Basement.
I identified a leak in the bucher valve block and rebuilt the down pilot and down spool. It now has no leaks but still has the relevelling issue. There are no leaks in the system now and the lift doesn't sink below floor level over a period of time.
I am wondering if the static pressure is too low (20 bar) or if the MCE LS-QUTE landing system (tape reader) or the HC-CTL board that the tape reader comes back to could be causing the relevelling. Any help would be much appreciated!
See attached photos of power pack and controller setup.
