When I bought my powerscreen, (three years old) it had been in a coal mine and the tracks were sized up pretty tight. Had to back off the adjusters to super loose and let the sized up sections go around however they would go. We drizzled used ATF on them every day. Once they started moving a little better I had one of my guys put it up on the jacks and spin the tracks for half an hour. They loosened up pretty well, but I still put used at on them evert now and then.