Ningbo 504 and Benye 504 are the same. The gearbox and power output of this model adopt meshing sleeve to shift gears, which solves the shift problem. This model has compact structure, convenient maintenance, reliable operation and few faults. The hydraulic steering gear is light and easy to operate, which greatly reduces the labor intensity. Four-wheel drive is more suitable for sticky and wet soil operations. Hydraulic lifting adopts force level adjustment, which can well meet the requirements of pear tillage and rotary tillage, and keep the tillage depth consistent. It can be used as a trailer for transportation and a fixed working power for pumping and threshing.