1. Preparation tools: wrench, pliers, detergent, etc.
2. Turn off the power supply and adjust the needle of the binding machine to the lowest position.
3. Pull the locking circlip of the needle cover plate with a flat screwdriver to open the needle cover plate.
4. Twist the old needle to separate it from the base, and then put the new needle in the corresponding position.
5. After confirming that the new needle is installed correctly, close the needle cover again.
6. Test whether the binding machine works normally.