I am starting some repairs on my mf175. I was check out a hyd lift problem and found something as I was looking inside the right side inspection panel. Looking straight in and to the left, down a bit, there is obviously part of the pto that spins. It has one thin disk on a rotating drum it looks like. When the tractors running it is ticking and knocking on the rotating drum. I know it is part of the PTO. Which is spinning all the time. Anyway, whats going on in there? I am waiting on my manual so I can get to this lift thing, and I will fix pto also. Hope I dont have split this thing to fix it. Any thoughts or advice?