We seem to be having a heck of a time with this, origionally the complaint was it was struggling to lift capacity 6000#. I set all the pressures so and wasn't working to bad. then somehow they managed to lift 12000# and flipped the machine, all is well. The relief pressure somehow went up to 4200 psi from 3200 psi, I've never seen relief pressure go up, only down, the pressure was lowered and so far so good, does sound familier to anyone? Also the relief was replaced before because it could only manage 1300 psi.