I have a gear L2501 with just over 100 hours on it. Has anyone had the right lifting rod on the three point back off while brush hogging? This started happening about 20 hours ago and causes the front of the right side of the deck to drop below the left and drag on the ground. I have to stop periodically to tighten the rod. From what I can tell the nut at the top does nothing to prevent this when it's tight as the rod backs "down" and away from the nut. Any ideas if you've had this issue would be appreciated.