I spent 40 years working at GM Dealerships doing diagnosis and repairs of cars, trucks, and medium duty trucks. Got promoted to shop foreman and lead technician then service manager. Admittedly I have limited knowledge of Dozers but I turned wrenches all my life and can load a new tube of grease in a grease gun in record time. Getting dirty and crawling around on the ground is normal for me. I maintain all my own equipment and will until the day I die..........