You must first know the existing code before you can reset the padlock.

1. Using the existing code, unlock the padlock.
2. Rotate the unlocked shackle 180 degrees and then press it down.
3. While the unlocked shackle is depressed manipulate the code wheels to the desired code.
4. Release the shackle and rotate back 180 degrees.
5. Your new code is ready to use.