550 split

So I have just completed rebuilding the hydraulic pump on my 550. cleaned up the hydraulic system and drained the trans fluid. The tractor is new to me and when I opened up the transmission noticed that the oil was pretty low. The tractor had been sitting for some time and I new it leaked a little, So I wasn't overly concerned. Once everything was back together I added new gear oil and begun a oil change and tune up. After a relatively short period of time I noticed an ever growing puddle of brand new gear oil developing on the floor. The drain hole in the clutch housing is apparently not plugged and functioning as it should. It appears that I will be splitting the tractor to replace the transmission seal. While I am in there I plan to replace the pto clutch as I believe it has been severely compromised by oil and water. While I have the tractor split should I just plan to replace the drive clutch as well? The clutch seems to have the proper amount of free play other than that I don't really have any more info about its functionality or condition. I have not used the tractor much other than to drive it into the garage to tear it apart. If I did replace the drive clutch I was thinking I would have a local reapair shop do the rebuild on it. Should I plan to do the same with the pto clutch or is that a reasonable operation for a novice? Is there anything else I should plan to do while I have the tractor apart? I have read some posts here regarding the z split and have gotten some useful info. The one question I have is how far do I need to role the back of the tractor? I have a somewhat limited work space for this and don't want to take things apart only to realize my work space is not long enough to actually separate the two halves. Thanks for all the help so far on the hydraulic system. Wouldn't have made it this far without all the help.
E

First off get the service book on the way and parts book too if
you don't already have them. The split is pretty easy and you
will need about four feet I would guess. When I go into a job
like this I get proactive and freshen up all the parts I need.
The pto parts are pretty pricey and if not to bad you may be
able to clean them and reuse them or some of them. The main
clutch if it has been oiled down change it for sure. Along
withthe pilot and throw out bearings. Also in this area is a
flexiable hose that greases the pto engagement these are
usually bad but agco has them still. There is also this brass
collar that may be worn out that the flex hose attaches to.. the
ptoclutch itself can get a little frustrating but take your time
and you will get through it. The design of this tractor is really
neat in comparison to many when you see how easy the split
is. Good luck

Eric make sure when and if you do replace the clutch disc: that you put the long side of drive hub towards the flywheel. It's not uncommon to see them put in wrong with long side facing away from fly wheel. With the long side out you will not be able to release when clutch is applied. Also you can give me a call on my cell 319-939-6660 if you have any questions. If you are going to put in new seals on the PTO drive coming out of transmission give me a call. The driven hub coming out of transmission is installed in a different way. If you have I+T manual it will be useful or I can answer these questions you might have.

I have a 550 that blew out the pto drive. i had to replace the pressure plate casting. I did the work in my small garage. putting the tractor back together took some finesse but it was not bad. I had a lot of fun but the parts were really expensive. however I needed the pto to work. after 15 years it is still working. it was a good investment.

How do I know if I need 5 discs vs the 6 clutch discs for the pto? Any suggestions on where to get parts for this? I have seen a couple of pto clutch and seal kits on eBay.

You can buy the parts for the PTO clutch at Korves, AgParts First and several other places. I'm not sure if the serial number will tell you the number of discs or not. I just pulled mine apart and then ordered the parts. That way I knew my total parts list.
As far as space goes, you'll need a few feet. its at least a good foot to get the two halves to come apart plus you need some additional room to get your hands in there. You don't need 10 feet but at least 3 feet.