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Very clean 2006 Mack truck. AI 4 valve engine with Mack 13 speed transmission and Mack 4.42 flat axle rears. 17'6" heated aluminum dump body and air operated everything: Hendrickson air suspension, air operated tailgate, air up/down steerable lift axle, air operated PTO. This video shows the multi stage hydraulic cylinder working effortlessly. This piece was sold June 5, 2012