Introduction Chassis description Dongfeng Xiaotianjin chassis, 3800 wheelbase, Cummins engine, Euro IV emission standard, 9-ton rear axle, air-cut brake, and direction assistance. Modification instructions Adopting enhanced hydraulic roll on roll off system, dual hydraulic cylinder control, roll on roll off and chain can realize roll on roll off box loading, unloading, unloading and other functions, hydraulic multi-way valve control, the …