DM Advantage fan drives are comprised of premium bearings, an air cartridge and a long-wearing friction liner. The improvements in cooling ability yield better engine performance and longer operating life. The spring-engaged DM Advantage on/off fan drive keeps engine coolant at a more consistent operating temperature and has increased reliability in high-horsepower applications. Also features high torque for turning larger fans, a lighter weight, low parts count for simplicity and a fail-safe design.