Used Freightliner 122SD Dump Truck for sale. Features: 2004 J&J Aluminum Dump Body, 18.5 ft. Dump Body Length, 20,000 lb. Steerable Lift Axle, Auto Tarper, and more. Visit Liberty Kenworth and Coopersburg Kenworth to see our HUGE inventory of new and new and used dump trucks, daycabs, sleepers, trailers, and more.