Mine went bad at about 300 hrs. I rebuilt it and had some issues as I didn't have the right tools. It took me about 5 hours and I got hosed with hydraulic oil in the face when I pushed the rod (that little cylinder holds more than you think). Rookie error. At 800 hrs it went out again and I was busy so I just bought a new one, about $150. It only took about 45 min to replace it. I think you can extend the life of these cylinders by using a proper counterweight when using the FEL which I sometimes don't do.