How to replace leaking PTO seal?

Hey all, i had my wife using our new to us Kuhn disc mower a little bit today to practice.  It was a lot of fun and she did great.  Needs to get the rpm and mph up a bit more but that will come.

Thank you Mack it is a 1983 6080. Can you elaborate a little more? How do I pull the rear housing? What do I do after that?

After rear housing is removed, there are some gears to remove before seal.
Check length of PTO shaft to make sure shaft is not too long causing binding of shaft.
Make sure PTO is engaged before removing rear housing or you will loose coupler.     MACK

Also i'm still curious about a gasket between the main case and the rear cover.

You don't have to pull off the top 3 point, I had to reseal that also.

Just make sure PTO don't collapse when 3 point is raised up and down. MACK

I didn't spell it right or it could be that stupid auto correct.  Here is a picture of the sealer. 

That long PTO shaft is the only thing that is holding it up from coming apart.  It is a pretty heavy unit so I use an engine hoist to lift on it while pulling backwards, run a bolt through the top link hole to hook onto.  Since it is so heavy it tends to drop down in the back and push up on that shaft which causes the bind.  You will have to pick up on the PTO shaft to try and level it out when pulling at the same time. When you get it out you will see that the shaft wants to stick up in the air.

Here are the other 2 pages of the FSM regarding the PTO.  In case you need it.

Well we got it! It took all day but the seal is replaced. We ran in to a few hiccups along the way.

The shaft did not want to come through the bearing so I bought a couple 6 inch bolts and threaded them through on the top so the cover would have rails to slide off on. We did some prying and pulling and it finally came, but it took the bearing with it. I guess that was better than fussing with it any more.

The main nut on the cover was on incredibly tight plus had the locking indents on it. After we struggled with it for a while we loaded it up in the back of the car and drove to my uncles mechanic garage where we could put an impact gun on it. 700 ft lb and it broke right free.

Getting to the seal after that was pretty simple, just some nuts and gears mostly. Seal didn't have anything obviously wrong with it.

Assembly was the reverse. Had to take a 2x4 and narrow one end to make it more like a 2x3 to reach in past the differential and knock that bearing back in to place for the main shaft. Put that anaerobic sealer to it. Shaft when in alright with the same long bolts rail system and we got it sealed up.

Took about 5-6 gallons of tractor fluid. I have a question on the fluid. I have a small leak on the steering hydraulic pison. Where does this piston get its fluid from? The differential fluid? Somewhere else? What about the fluid for the loader and the rear remotes? I would like to check levels but I'm not sure where they pull thier fluid from.

THANK YOU!

Thanks LB I'm going to change the trans oil next. My serial number is a few hundred after they changed over to no suction screen.

If I remember right the shift fork which changes 540 to 1000 is spring loaded one way.  Could be something in that area, if the gears and the nut on the output PTO shaft is tight.  I try to get that nut just past where the previous stakes were.

Hmm it's difficult to say. I could feel the clunking in my hand when I was holding the top of the long shaft and spinning it back and forth. It's definitely in that shaft somewhere in the back of the cover. I did not touch the adjustment for that shift fork and the spring is on just as I had taken it off. I will keep you all updated if anything happens.

Thank you for chiming in.

Gears are touching each other for some reason. Does it do it in both 1000 and 540?       MACK

Hi Trent here have pto problems with 6080 I recently got I'm 50 miles north of you approx could we talk on phone.