Called dealer today to check on the status of my tractor. They are going to put vent tubes on battery and run them under tractor so any venting will be away from oil cooler. They are also going to "clean-up" any existing corrosion and make a note in their computer system in case that becomes an issue in the future. Dealer thinks there is only minor corrosion to some of the cooling "fins". I don't know if there is a better word for that or not. /forums/images/graemlins/confused.gif
I think I should be satisfied with this fix unless there is something I am missing.