Cat 3126 6 Cylinder Diesel 300 hp Engine, 2000 US EPA Label, 4135.9 Engine hrs, Air Conditioner, Cruise Control, Exhaust Brake, Eaton Fuller 16-Speed Manual Transmission, Differential Lock, 20000 lb Front Axle, 60000 lb Rears, Dana DS405 Drive Axles, 4.33:1 Axle Ratio, 60000 lb GVWR, Aluminum Outer Wheels, 315/80R22.5 Front Tires, 11R22.5 Rear Tires, Spring Suspension, PTO, 56000 lb Capacity, Rear Mounted, 152 ft 4 Section Boom, Johnson 25 ton Capacity Hook Block, Manitowc Swingaway Offset Jib, 25 m Jib Extension, Enclosed Cab, Out and Down Outriggers, 22 ft x 96 in Bed