I just wanted to update this old thread I hijacked. I was able to get my seal replaced and fix my slow leak around the PTO shaft. It ended up being a pretty simple procedure. Once I took the bolts out of the housing it just took a little persuasion to separate from the tractor. The old gasket had a pretty good hold still. Once that was removed I just had to get the seal out of the housing. It didn't come out super easily, but at the time I wasn't exactly sure what I was working with so I didn't get too physical with it. Ultimately, you can just take it out in pieces if you have to. It is in there pretty snug. I just pried it out a little until I could get on it with needle nose and then started working my way around. Once it was out I sat the new one in there and lined it up. I then used the old one as a press in a way and slowly hit it around until it got seated. That last 1/16" was a bit tough, but it made it. At that point I just took a razor blade and cleaned off the old gasket from the tractor and the housing and put the new gasket on, put the bolts back in and called it a job. Just remember, try to do this when you're replacing your hydraulic oil. Or at least drain the oil. But it's been a week now and I have no leaks at all so it did the trick. Thanks to the contributors on this post and if the next guy has any questions, please let me know. I'm happy to help in any way I can. That's what this place is for!