I think I am not a very good tractor owner. I do grease the tractor at its suggested times, but this is also the only time I tend to check its other fluids. Make sure all its other fluids are where they should be at this time at least.
I would also suggest on cleaning the area around that fan, it works by blowing air over the metal case....if that case if caked full of gunk it insulates it and it will not cool like it should.