Got a Hein Werner model M quick lift floor jack . Got the main ram cylinder taken off the rest of the jack and need to remove the end nut off and the cylinder screwed off the body . The end nut is 2 - 2 1/2 " . I put a pipe wrench on the nut while the cylinder was in my vise . It wouldn't budge . Anyone have an idea on how to get the thing unscrewed without squeezing the cylinder flat in a vise ?