Used Mack RD688S Dump Truck with Salt Spreader for Sale. Features: Double Frame, Non-steerable Lift Axle, 17 ft. Beau-Roc Steel Dump Body, No Tailgate, Salt Dogg Spreader mounted in bed, Cruise Control, Hydraulic Snow Plow Frame, and more. Truck starts, runs, and spreader works. Sold as-is. Coopersburg & Liberty Kenworth has new trucks, used trucks, trailers, and parts for sale. Locations: Coopersburg, PA (near Allentown), Swedesboro, NJ (near Philadelphia), and TRP 068 (Pottstown, PA).