How to Change the Combination on an S&G Group 2 Combination Lock


The Sargent & Greenleaf (S&G) Group 2 combination lock is a heavy-duty safe lock with more than 1 million possible combinations. The company uses it to secure a variety of safes. Changing the lock combination regularly helps prevent against theft and tampering. The lock has a high level of security, and although the method for changing the combination is bit involved, it is not too difficult to follow.

Things You'll Need

  • Lock change key
  • Enter the active combination and open the door.

  • Leave the door open, but relock the lock by spinning all three dials at least a couple notches.

  • Enter the combination again, using the "changing index" guide located at the 11 o'clock position, rather than the regular guide marker at the 12 o'clock position.

  • Insert the lock change key into the side of the lock panel. This key comes with the lock and looks somewhat like an Allen wrench.

  • Rotate the key 90 degrees counter-clockwise.

  • Spin the wheel four full turns counter-clockwise, then end on the first number of a new combination. Again, align the numbers with the "changing index" marker.

  • Spin the wheel three full turns clockwise, then end on the second number of the new combination.

  • Spin the wheel two full turns counter-clockwise, then end on the third (and final) number of the new combination.

  • Spin the wheel clockwise exactly 10 digits.

  • Rotate the change key 90 degrees clockwise to lock in the combination.

  • Test out the combination several times before closing the door.

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  • Photo Credit safe image by goce risteski from
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