The CaseIH STX500QT Quadtrac is an articulated crawler tractor produced from 2004 to 2006 as part of the Steiger STX Series. It features a powerful Cummins 15.0L 6-cylinder turbocharged diesel engine delivering 500 hp, hydrostatic power steering, and integrated hydraulic wet disc brakes. The tractor is equipped with a 16-speed full power shift transmission and offers a rear PTO rated at 440 hp. It has a wheelbase of 154 inches and weighs 53264 lbs. The STX500QT is built in Fargo, North Dakota, USA, and comes standard with a Surveyor Cab. It offers 30 or 36 inch track width options and a rear lift capacity of 19500 lbs.