Mack EM7 6 Cylinder Diesel 300 hp Engine, 1991 US EPA Label, 2133 Engine hrs, Manual Transmission, Differential Lock, 20000 lb Front Axle, 38000 lb Rears, 58000 lb GVWR, 425/65R22.5 Front Tires, 11R22.5 Rear Tires, Camelback Suspension, 225 in Wheelbase, Berkeley PTO Driven Pump, Front Spray, Rear Spray