How to Open a Master Lock Combination Lock without the Code

Master Lock combination locks are renowned for their reliability and security, but forgetting the combination can be frustrating. Before resorting to bolt cutters, follow this guide to unlock your Master Lock without the code. We cover both scenarios: with and without the serial number.

Without a Serial Number

1. Turn the Dial Clockwise at Least 3 Times to Clear It Start by turning the dial clockwise three full rotations. This step ensures that any previous attempts to open the lock are reset.

2. Apply Pressure on the Shackle The shackle is the curved handle at the top of the padlock. Pull up on the shackle to apply tension. Then, turn the dial clockwise (CW) slowly. If the dial doesn’t turn, release the shackle, turn the dial slightly, and try again.

3. Find the First Sticking Point While maintaining tension on the shackle, slowly turn the dial clockwise. You will encounter a point where the dial stops turning. This is the first sticking point. Note the number where it stops. Sometimes, the sticking point will be between numbers, so record the number to the nearest half (e.g., 22.5).

4. Release the Shackle and Turn the Dial Slightly Past the Sticking Point Let go of the shackle and turn the dial clockwise just past the first sticking point. This adjustment helps move past the sticking point for further steps.

5. Reapply Tension and Continue Turning the Dial Reapply tension to the shackle and continue turning the dial clockwise. You will find 11 more sticking points in one complete turn of the dial. Write down all 12 sticking points.

6. Identify the Third Number From the list of 12 sticking points, eliminate all non-whole numbers (i.e., cross off numbers ending in .5). From the remaining numbers, choose the one with a unique digit in the “ones” place. This number is the third number of the combination.

7. Divide the Third Number by 4 Take the third number and divide it by 4. Record the remainder (0, 1, 2, or 3). This remainder is your “magic number.”

8. Find Possible First Numbers Add 4 to your magic number repeatedly until you circle the dial. These numbers are potential candidates for the first number of your combination.

9. Determine Possible Second Numbers Adjust your magic number: if it’s 0 or 1, add 2; otherwise, subtract 2. Add 4 to the result repeatedly until you complete a circle around the dial. These are the potential second numbers.

10. Cross Out Close Numbers Eliminate any second numbers that are within 2 digits of the third number.

11. Trial and Error You now have a reduced set of possible combinations. Try each combination until the lock opens. This method significantly narrows down the possibilities from 64,000 to just 80 combinations.

12. Use the CCW Trick Another method involves turning the dial counterclockwise (CCW) while applying tension to the shackle. Find the sticking point and add 5 to that number to estimate the first number of the combination.

13. Retry Combinations Without Clearing the Lock Once you have a potential combination, try it without resetting the lock unless the first or third number exceeds the second number. This approach helps streamline the trial process.

With a Serial Number

If you have the lock’s serial number, retrieving the combination is straightforward:

1. Download the "Lost Combination Form" from Master Lock’s Website Master Lock provides a form for lost combinations on their website. Download it but don’t fill it out yet.

2. Notarize the Form Take the form to a notary public and have it notarized. This step proves ownership of the lock. Most banks offer notary services for a small fee.

3. Photocopy the Lock’s Serial Number Make a photocopy of the lock’s serial number, ensuring the lock isn’t attached to anything. Handwrite the serial number beneath the photocopy.

4. Mail the Form and Photocopy Send the notarized form and the photocopy to:

   Master Lock Warehouse
   24 North Free Port Drive
   Nogales, AZ 85621

5. Wait for Your Combination Master Lock will process your request and mail you the combination in 4 to 6 weeks. Test the combination on your lock to ensure it works.

Conclusion

Opening a Master Lock combination lock without the code is a meticulous process but entirely feasible. The methods outlined above provide a step-by-step guide to unlocking your lock, whether or not you have the serial number. Always ensure you have the right to unlock the lock to avoid legal issues.

For persistent challenges, contacting Master Lock for assistance remains a reliable option. By following these steps, you can reclaim access to your secured items without damaging your lock.

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