Purchased an old 98 763 with a blown engine. I used to work for the only so I knew the bobcat a bit. He had proven the left lift arm in several areas requiring a weld shop to patch. When finished the left side was 2" lower than the right. During my rebuilding of that arm and the center structure I noted only the left cylinder lifts... full of fluid. Where do I start. I did just rebuild that cylinder also.