What does S&G stand for?

If you have a safe and the Dial has S&G on the face and you have always wondered what it meant, here is your answer: Sargent and Greenleaf ; a U.S. company that manufactures combination locks, key-operated safes, time locks, digital safe locks and safety deposit locks.Here is a picture of their logo.

How to change code for S&G Model 6121

Below will be some basic instructions on how to change the User code, Master code, Supervisor code and how to delete a user or supervisor code.  There is only one Master code so it cannot be deleted only changed. You will need the master code with out it you will not be able to change the master code.

The default code from the factory is 123456#

To Change the Master code (code #1)... Must be 6 digits
PRESS: [ 7 ,4] (MASTER CODE)  #  1  *  (NEW MASTER CODE) # (NEW MASTER CODE) #
       
  After the final # is pressed the lock will make three distinct chirps to indicate that the Master code has been accepted. If a long series of closely spaced chirps sounds the new code was not accepted and the old code remains.

To Change The Supervisor code (Code#2)...   Must be 6 digits
PRESS: [ 7 ,4] (MASTER or SUPER code) # 2 * (NEW SUPER CODE) # (NEW SUPER CODE) # 

After the final # is pressed the lock will make three distinct chirps to indicate that the Supervisor code has been accepted. If a long series of closely spaced chirps sounds the new code was not accepted and the old code remains. 

To Change a User code... Must be 6 digits
PRESS: [7,4](MASTER or SUPER code) # (USER I.D. 3 Through 9) * ( New user code) # (New user code) #

To Delete a User or Supervisor code
Press: [7,4] * (code to delete) # (User I.D. 2 Through 9) * # #

After the final # is pressed the lock will make three distinct chirps to indicate that the user code has been deleted. If a long series of closely spaced chirps sounds, the has not been delete.

Click here for service manual

How to change the combination of a S&G mechanical safe lock

Sargent and Greenleaf
Model 6730, 6735, 6738, 6741 Mechanical Combination Lock

When preparing to change the combination on any Mechanical safe lock you will need the following.

1. safe change tool(key) that is made for that particular safe dial wheel set up.
2. The old safe combo(The combo you are changing)
3. The new combo(Which shouldn't be too simple or close to the old code for security reasons)

Once these essentials are acquired we can begin the set-up
Now you want to open the safe and keep the door open at all times even after the safe combo has been change to check the combo at least 2-3 times with the door open to insure that the wheels set properly and to make sure the combo works well.

The change index- Every Sargent and Greenleaf dials should have a "Change Index line" Which is the line to the left of the Opening index line. Once the safe is open you must dial the old code to the change line for the wheels to line up properly so you can insert your change tool in the back of the housing. Insert the tool fully and rotate 90º Counter-Clockwise. You will hear a "Click". Now follow the instructions below to set your new combo.

How to set to a new combination:

1.Turn the dial left until the first new numbers aligns with the

   changing index the fourth time.

2.Turn the dial right until the second new number aligns with

    the changing index the third time.

3.Turn the dial left until the third new number aligns with the

    changing index the second time.

At this point your wheels are lined up. 

5. Turn the changing tool  approximately 90º clockwise and remove
    it from the lock.

*Do not pull on the change tool until it has been

fully rotated to the same position that you inserted it initially.