Johnagain
Bronze Member
When you disconnected both hoses did you get any fluid out of the pressure hose? With both hoses disconnected the box should have dropped very fast. If this doesn't happen the next test should be disconnect the vent hose at the cylinder when the box is PART of the way up. BEFORE YOU DISCONNECT THE HOSE PUT A 2/4 OR STEEL PIPE SO THE BOX DOESN'T DROP ON YOU. After removing hose then raise box up and remove the pipe or 2/4 and see how fast it drops. if it drops fast then the vent hose might have a plug or trash in it. You might also want to check the fitting I know that sometimes the teflon tape they put on the fitting wads up and can plug the fitting or hose.