The adjustment method of traction pin clearance is as follows:
1. Stop the vehicle on a flat road without load and pull up the trailer hand brake;
2. Loosen the lock nut of the saddle adjusting bolt rod and turn the adjusting screw counterclockwise until the saddle handle is pulled out;
3. Turn the adjusting screw clockwise for 1 to 1.5 turns and tighten the lock nut to eliminate the gap. Traction pin is a metal standard part used in vehicle to connect tractor and trailer. It can be divided into mushroom type, cross type, double spoon type and L type according to its shape; 2. According to the diameter, the traction pin can be divided into 50 and 90; 3. According to the national standard, the traction pin can be divided into type A and type B according to its shape; 4. According to the assembly method, it can be divided into welding type and assembly type.