[Wayne County Hose]

I've never done a gray market Yanmar cylinder, but loads of common ones. Most I have seen have a one piece piston,nut combo. The piston rides very close to the cylinder wall and has a 2 piece piston seal with a wear band on either side of the seal. Internal o-ring, and an external square ptfe ring that rides the cylinder wall. It is possible that the nut/piston assembly came off, but I would suspect internal damage if that did occur. I can not see it having any kind of pin hole, it's either blown out, or okay.

If you're pretty good with a wrench, take it off and rip it apart, I don't think you can damage it any more than it is. If it has the cap I think it does, spanner wrenches can take it off, maybe. I have the proper spanner wrenches and hit them with a 3 lb ball peen and they still won't come off. I end up using the same hammer and a big chisel to break it loose.

If it were my tractor and you reseal one side, I would do the other side also as they are sister cylinders, the other side may not be far behind. Good luck.