after having major overheating problems....last summer, i removed the radiator....had it steam cleaned, replaced the upper and lower hoses. just came back in the house a few hours ago from mowing my runway, it still overheated. didnt boil over, but lost some from the overflow. and the temp. outside was only 60. there is no waterpump or thermostat on this model. im certain the radiator is clean. have no isues with a blown head gasket....dont see any movement in the top can when its running. 470.00 for a new radiator is my only option. chime in here with possible causes for this occurring. tractor runs fine.....no issues. im getting to the point of buying a john deere