Hello. I resently purchased a 26hp kubota tractor. Month and a half ago. Decided to brush hog About an hour or so into the project. White smoke blew from the hood. Overheated. Took to dealership and they stayed engine was blown and needed replaced. They also said warranty would not cover I was doing nothing that the tractor wasn’t designed to do. This was first time I brush hogged this area so was paying really close attention to the area. Glanced at gauges few times. Any suggestions.