Engine would overheat when in 4 wheel drive or brushhogging after one hour. Did everything. Lowered battery, changed thermostat, changed water temp sensor. That helped a lot, but would still overheat. Noticed inner air cleaner was sucked in a little bit. Still looked clean andno debris that i could see. Changed both inner and outer air filters. That made the biggestdifference of all. It is a lot better now, not perfect, but i can live with it.