2000 Posts and climbing!!!
Join Date: Jun 2011
Re: F725 with FD590V 20Hp overheating
Take a close look at the radiator as well. On my mowing tractor, (radiator in the very front, with a mid-mount belly deck) I have to clean the radiator out after each mowing, else it clogs up with clippings. It develops a nice mat on the front, and you can peel it off like a rug......
That wouldn't account for coolant loss though.... Now, the overheating *may* be due to the fact that the system isn't reaching its designed pressure. Higher pressure raises the boiling point of the fluid.....
I *think* you can get adapters for cooling system pressure testers, that will fit the radiator on the tractor. Local auto parts store might be able to help you out with that. (and even rent you the tool.....) The also have test kits, to see if you are getting combustion gases into the coolant. (a sure indicator of a blown head gasket.)