Has anyone had a problem with engaging the PTO on a 60" Lazer Z? It works fine when the mover is cold, but after running it for a while is when the problem begins. If I stop the PTO and try to restart it, it sometimes takes 2-3 min before it will engage again. It makes a noise like it wants to engauge, but just sits there for a couple of min. Almost seems like some kind of clutch problem? Thanks for any help.