Catterpillar is the world`s leading manufacturer and exporter of construction and mining equipment, diesel and natural gas engines and industrial gas turbines. Catterpillar offers 939c hystat track-type loader. A single lever joystick control is all that is needed to control speed, direction and steering on cat 939c hystat track-type loaders. Full power turn capability is made possible by maintaining power to both tracks at any ground speed or turning radius. You`ll find operating a loader of this size has never been easier or as much fun.