Master Lock 647D Series Programming Instructions
Note: This lock is preset at the factory to open at 0-0-0.
1. With dials at 0-0-0, pull out shackle.
2. Turn shackle counterclockwise 90° (1/4 turn) and press it down.
3. Continue FIRMLY PRESSING SHACKLE DOWN and turn another 90° (1/4 turn).
4. Set the dials to your own combination.
5. Turn shackle clockwise back to the original 90° position.
6. Lift shackle and return shackle to closed position