Used Mack GU713 Tri Axle Dump Truck for sale. Features: Heavy Single Frame, 18,000 lb. Non-steerable Lift Axle, 2-way Tailgate, Aftermarket Trunnion, Body Vibrator, Electric Flip Tarper, Air Tailgate Release, Power Passenger Side Window, Power Locks, Heated Chrome Power Mirrors, Tilt Steering Column, Single Vertical Exhaust, Air Ride Cab, In-Dash Pyrometer, Block Heater, Strobe Lights, 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).