If you push the "auto retract" button on the HWH control panel, it will open the valves to allow the levelers to retract. Normally the springs on each jack will retract the jack pistons. While these valves are open you can go to the "slow" jack and use a piece of lumber to provide additional leverage to push the jack up. If this does the trick then the springs on this jack are weak or there is more friction on the piston or the reservoir is full (?)... You can clean the area around the seal and the shiny metal shaft to see if that helps... if not, you probably need to replace the springs. The springs are notorious for this... or breaking. I always carry a few bungees to hold the jack up in case the spring breaks.