I used to have one like yours, 2006 28hp cat 60inch cut. I had bearing problems on mine as well. I also had switch problems with the deck height just like you do. I had to replace all of my spindle bearings by 300 hours. I also had my hydraulic lines blow off quite often as well. You will want to keep your radiator washed out with a pressure washer or your going to have over heating problems. I many other problems as well and i finally sold mine at the end of last year. The engine was very strong but unfortunately the rest of the mower was not. I have had much better luck with my lightning. Good Luck!