dfloyd0105
New member
I have a 1980 International tractor. When the tractor gets hot the hydraulics quit working. They will start out by getting slow and jerky and then quit. The power steering goes out also. When you let it cool for a while it works fine again for about a hour and then the same thing. We had a guy put a new pump on and new hytran oil and it still does the same thing. We noticed today aa the temperature gets cooler later in the day the hydraulics work better but not great. I know a guy that runs 30sae motor oil in his hydraulics because the other oil gets to thin and doesn't work. Any opinions or advice would be greatly appreciated