Befor I read the last post I went out and tryed to lossen the nut. had no luck its just not acting right. what i have is after i took the cover off, the nut and allen head move in and out about a half of a inch. I tryed to loosen the nut, but it want's to go back inside its hole so its hard to keep a wrench on the nut. tryed a socket but can't hold the allen head. when i turn the nut with the socket it turnes,very hard though but the shaft does not turn, I'm touching it on the left side. I guess if i knew how this thing works or made it would be easier. I figure its a shaft with a lock nut so you can adjust your clutch. is it a floating shaft with play both ways without tension on the clutch? I need a break