For the operation of the vehicle, the semi trailer is as important as the tractor, so how should the semi-trailer be maintained? The following points should be noted.

1, Frequently check whether the trailer tire bolts are loose.

2, Check the suspension every two days and adjust the tie rods to see if the bolts are loose.

3, Ensure the specified tire pressure when driving.

4, Check whether there is air leakage in the air pipe.

5, Regularly check the distance between the traction pin and the center of the semi trailer axle at both ends, the error shall not be more than 1.5mm.

6, Check whether the steel U-bolt is loose every 5000km.

7, The trailer can not be overloaded , unbalanced, or concentrated in the middle of the frame.

8, The spare tire must be fixed tightly and the safety bolts must be locked.

In addition, drivers should also develop good driving habits and be diligent in maintenance, which can avoid many unnecessary troubles.