I am working on the pto clutch on a 550 and also putting all new seals in that I can get to, from what I understand there is a seal inside of the hollow pto shaft and a lip type seal behind the bearing sleeve. In the manual it says to unbolt the 3 nuts and simply lift off sleeve and it doesn't seem to work that way and the part where the bearing slides wont slide over the pto splines where it goes into the pressure plate, is there something I don't know or should be doing any help would be appreciated. thank you