pto on 560 wont shut off

We have 2 300's that were used for everything around the farm and I know that the pto has not been worked on in either one of them for 40 yrs and I doubt if they got worked on before that

300s doing heavy pto work would burn that planetary pto up as well, I rebuilt mine 4 or 5 times in 35 years.

With regards to the particular PTO in question, I've never seen a planetary with this symptom. Very common with the clutch type, therefore I think the question at hand is adjustment of the clutch type. Having said this, and while the two clutch type are very similar, the adjustment proceedure is quite different, thus I feel it is imperitive he find out which type he has, then find the proper manual for that adjustment. From the description, quite frankly I think his PTO is toast.

I rebuilt the planetary in my 300 several times in 35 years. I rebuilt the clutch type in my 560 at least 5 maybe 6 times in 17 years. Bear in mind that 560 was turning out 90 hp all those years and was worked accordingly.

Do you know which type of PTO your 560 has? There were two, both looked very much alike on the outside. There was a change mid way in production, I don't know the serial number at change. With the early models the PTO had to be removed from tractor for PTO clutch pack adjustment. On late model tractors clutch pack adjustment was done through a 1.5" round hole in top of PTO. You should have the proper manual and try clutch pack adjustment.

You could have clutch pack adjusted too strong, thus it is over powering the brake. Fair warning though, they do the same when the unit is toast. I had my 560 for 17 years never got the clutch pack over adjusted, but I did rebuilt it every couple of years. Bear in mind my 560 was turning 90 hp all those years. 1954 to 1963 were the years of IPTO evolution, IH didn't get it right until 06 series tractors in my opinion.