I had Ted(Original Original) parked in my backyard shed most of the winter and I went to take it out and there was a puddle of oil under it 
I wasn't sure if it was the rear or the REAR PTO as it was very wet around the bottom 3 point brackets. I started it up and went to engage the rear PTO and the lever wouldn't move and wasn't engaged. I took it up to the shop and removed the right angle drive I have on it and started playing with the leaver and it moved a little and the PTO was engaged 
. but now it wouldn't disingage 
Take the 5 bolts loose that hold the shaft part of the PTO and when I move the leaver the entire shaft would move . I was certian at this pont tat I knew what the problem was 
. Most of you will never put a rear PTO on their Original or NF tractor but getting that shaft in and the lever(#17) in to the Clutch, PTO Shifter(#16) isn't easy even though they give you a cover(#2) that suggests that it is easy.I took all the bolts out and pulled the shaft assembly out and found my problem. Item #16 has a "Screw, 1/4-20 X 1/4 Hex Soc Hd Half Dog Pt Set" which goes into a slot cut into a spline on shaft(#11) so the item #16 doesn't fall to the bottom of the case. That setscrew which is left loose had tightened down on the shaft from vibration and only had very little movement
Putting the shaft assembly back in is a real challenge and I found the best way it to hang #16 on the main shaft and getting #17 which goes through the case in the groove. I had learned that you can get to that set screw through the top fill hole in the transmission 
. I put some lock-tite on the screw so it won't happen again. The oil leak was because I don't have a hole for #5 dowel pin and ended up with the gasket upside down left the oil leak out that hole between the covers 
ole
of using a longer set screw and adding a nut to it like they do on the front mechanical PTO bearing lock collar. Not sure if that would work 
