MasterLock notes Russell Bateman April 2024 last update:

How to configure a new combination

1. Adjust dials so   0 0 0 0   (new purchase) or current combination is aligned with marks.
2. Withdraw shackle to open lock.
3. Turn slot on bottom to the circle using coin or screwdriver.
4. Adjust dials to reflect new combination.
5. Turn slot on bottom back to left.
6. Close shackle.
7. To reset combination, repeat steps 1 - 6.