Has anyone out there had one of these cylinders apart? Mine is the type with two 1/8" pipe plugs on opposite sides of the barrel near the rod end. Parts book shows it as AL 36565. Do the plugs need to be out before the rod can be removed? The parts book shows only the rod, a wiper ring and the seal. No snap rings or retainers other than the two pipe plugs? I don't see anything on the rod other than the seal. Nothing that the plugs might be involved with. Any ideas?