Under various operating conditions, agricultural tractors must adjust the wheel track of the driving wheels to ensure optimal performance and work quality.
First, let’s look at different job conditions and the corresponding wheel alignment requirements.
1. **Transportation Operation**: When moving the tractor over long distances or on roads, the drive wheel track should be set to its maximum position. This ensures stability and better handling during transportation.
2. **Rotary Tillage Operation**: When using rotary tillers on dry land with rubber tires, a narrower wheelbase is preferred—typically 630mm. However, in paddy fields, the wheelbase should be widened to the maximum to prevent the wheels from colliding with the rotary cultivator when turning.
3. **Ploughing Operation**: During ploughing, the wheelbase should be adjusted based on the total width of the plow share. Usually, the maximum track width is used for stability. However, to prevent soil leakage, the right drive wheel should be moved inward. The adjustment method involves removing the wheel hub, inserting the drive wheel into the axle shaft according to the position of the outer wheel, and then reinstalling the hub with the smaller track width.
4. **Other Operations**: For other tasks such as planting or harvesting, the wheelbase should be adjusted according to the crop row spacing and specific operational needs.
Second, here are the methods and precautions for adjusting the wheel track. Start by loosening the four fixing nuts that secure the drive wheels. Remove the drive wheel assembly, then loosen the two clamping bolts on the wheel hub and the set screws. Carefully remove the hub. Next, place the hub at the desired position along the half-shaft based on the required track width, ensuring it aligns with the positioning holes. The set screw head must be aligned with the counterbore on the axle shaft to ensure proper engagement. Make sure the drive wheel, hub, and axle are securely connected.
Additionally, the left and right drive wheels can be swapped to change the track width as needed. However, always check that the tire treads are not installed in the opposite direction, as this could affect traction and safety. Finally, tighten all bolts to the specified torque values to ensure a secure and safe setup.
By following these steps, operators can optimize the tractor’s performance under different field conditions, improving efficiency and reducing wear on both the machine and the equipment.
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