Used Mack GU713 Tri Axle Dump Truck for sale. Features: Air Ride Cab, Dual Power Steering Boxes, Single Frame, 20,000 lb. Hendrickson Non-steerable Lift Axle, 17.5 ft. x 54 in. Steel Beau-Roc Dump Body, Auto Tarper, Air Locking Tailgate, Body Vibrator, Power Heated Mirrors, Power Passenger Window, Power Locks, Tilt Steering Column, Air Conditioning, Cruise Control, and more. Hundreds of new and used trucks, trailers, and parts for sale at Coopersburg & Liberty Kenworth. Three convenient locations: Coopersburg, PA (near Allentown), Swedesboro, NJ (near Philadelphia), and TRP Parts (Pottstown, PA).