This is a old C500-30-235 Clark with a orbitrol steering unit and a cylinder that runs down and under, along the left side of the machine. The shaft of the cylinder bolts to the frame behind the front wheel with the polyurothane bushings. This is the cylinder that has the head welded on. You can replace the shaft seals by removing a snap ring but you can't take the cylinder apart to get to the piston. Anyway, this thing is drifting all over the place and has very weak power steering. I'm sure it's the cylinder causing it. How do you fix that? Cut the cylinder apart? Buy a new one?