I had an IH 2505 that I had to chain up the 3 pt arms. It came with
land we bought and was my first tractor.
The IH dealer had it for a couple of months, couldn't find the problem, and charged me $300. Eventually I gave up and bought my first Kubota. I gave the IH to a friend of my son. He found the problem, the wrong hydraulic filter had been installed!
Good luck!