Tony,
What speed were you using for kneading?
Their manual indicates to use speed 2. I had thought that stir or speed 1 might be easier on the machine, so I contacted them about this point. According to KA, only speed 2 is to be used for kneading. As it was explained to me, speeds lower than that don't provide sufficient cooling from the internal fan, and speeds faster than that may tax the machine too much.