Depending on the age of the tractor, now might be a good time to do a drain and refill of the cooling system. I prefer the new premix bottles, so I don't have to worry about contaminants in the domestic water supply being introduced to the tractor. I could buy distilled water, but there isn't that much of a cost savings in the end when you consider the little that you will use and the time it takes to mix etc. Dusty
Make sure you get the correct allen socket for the plug. It is a real pain to unscrew the plug. Kubota grey paint on the block sticks pretty good . . .