Things You'll Need
Instructions
Open the gun safe using your original combination.
Dial in your original combination on the index changing mark, located at the 11:00 o'clock position of the mechanical lock. Make sure the third and final number in your combination sequence stops accurately on the index changing mark.
Insert the change key into the back of the lock. Turn the key to open up the wheels and prepare the lock for a new combination sequence.
Dial in your new combination on the index changing mark. Dial in the first number of your combination four times to the left. Dial in the second number of your combination three times to the right. Dial in the third number of your combination two times to the left. Make sure each number stops accurately on the index changing mark.
Remove the change key from the back of the lock. Test your new combination with the safe open to make sure your new combination works.