Machine description: Cat C15 ACERT 550 hp Engine, Engine Brake, Eaton Fuller 18-Speed Transmission, Differential Lock, 46000 lb Rears, 385/65R22.5 Front Tires, 11R22.5 Rear Tires, Air Ride Suspension, 4750 mm Wheelbase, P... more info about the 2009 Caterpillar CT630.