Under different operating conditions, agricultural tractors should adjust the driving wheel track to ensure the quality of work. First, the adjustment of several job conditions Transport operations: Adjust the driving wheel track to the maximum position and the vehicle is running steadily. 2. Rotary tillage operation: If the rubber tires are used in rotary farming on dry land, the wheelbase should be small, and a 630mm wheelbase can be used. In the paddy field, the maximum track distance should be used to ensure that the turning wheel does not collide with the rotary cultivator. 3. During ploughing operations, the wheelbase is re-adjusted according to the total width of the ploughshare, and the maximum track width is generally used. However, in order to avoid leakage, the right drive wheel needs to be moved inside. Move-in method: Remove the wheel hub. The drive wheel is firstly inserted into the axle shaft according to the large track position, and the wheel hub is installed on the small track. 4. In other operations, the wheelbase should be appropriately adjusted according to the operating requirements and the row spacing of the crops. Second, the wheel adjustment method and precautions. First loosen the four drive wheel retaining nuts and remove the drive wheel assembly. Loosen the two wheel hub clamping bolts, loosen the set screws, and remove the wheel hub. Then the wheel hub is placed at different positions on the axle shaft according to the wheel spacing required by the operation, and is aligned with the positioning hole on the axle shaft. The head of the positioning screw must be aligned with the counterbore driving the axle shaft, the driving wheel, the wheel hub and Axle shafts must be reliably connected. In addition, the left and right driving wheels can be exchanged with each other to change the track pitch according to the operating requirements. Pay attention to the tires can not be installed in the opposite direction. Finally tighten the tightening bolts of each part according to the specified torque.