1986, MACK RD688S BOOM TRUCK, 195748 Km.Mack RD688S Truck: Motor: Mack E6 350 hp 2V. Transmission: TRTXL107B Differential: Mack Axles: 18/44 Front tires: 365/80R20 Rear tires: 12R22.5 Platform: 20' National Crane 1989: 17 tons, 85' 120'.