Dongfeng D9 Vacuum Suction Tank Truck Chassis & Driving Performance First of all, this Dongfeng D9 vacuum suction truck adopts the brand‑new Dolica high‑end chassis. It runs on a reliable Yuchai 170 HP (125 kW) diesel engine that meets National VI emission standards. Besides, the 3950 mm wheelbase, power steering, factory clutch booster and original air‑conditioning bring drivers great comfort. What’s more, …