-1. Before connecting, check and remove the sand, dust or other foreign matter on the surface of the traction seat of the tractor, the traction pin and the traction pin plate of the semi trailer, and check whether there is enough grease.
-2. In order to connect smoothly, the support device should be operated to make the semi trailer traction pin plate fit the height of the tractor head traction seat. Generally, the trailer traction pin plate is about 10–30MM lower than the center position of the tractor traction seat. Otherwise Sometimes not only can not be connected, but also damage the traction seat, traction pin and related parts.
-3. Operate the locking mechanism of the traction seat to open the locking block, and then check whether the locking block is opened to a free state.
-4. Reverse the tractor head, make the semi trailer traction pin enter the opening of the locking mechanism from the V-shaped opening of the traction seat, and make the locking block rotate, and the locking block and the traction pin are automatically locked.
-5. Check whether the locking mechanism of the traction seat has locked the traction pin, and whether the locking is safe and reliable.
-6. Move the tractor head forward slightly to check the connection.