How To Crack An Old Mosler Safe

  1. How To Crack An Old Mosler Safe
  2. How To Crack An Old Mosler Safe Lock

A small locksmith business in Iceland is missing a number combination for an old Mosler Safe that we need to open. If you know someone or can tell us the combination please email us. The safe has a red plate above the lock that says with a gold font: The Mosler Safe Co. Factories - Hamilton, Ohio Class One Hour Fire Underwriters Laboratories, INC. Inspected Safe -Class Fire C - NO.102580. Fire safes are reinforced with fire retardant materials but have little in the way of actual protection against unwanted entry. The typical burglary safe is built to withstand a considerable attack. But due to their reinforced steel frames and iron cladding, the burglary safe tends to act like an oven; effectively cooking the contents when.

Customers frequently need the proper dialing procedures for their safes. They may have the numbers, but don’t know how many turns to the left or right. This section will help you determine how to open your combination lock.

There are many different types of combination locks so there are also many different dialing sequences. The first step is to determine which type of lock you have. Go to the Safe Lock Identification page to help figure out what you have, then come back to this section and look for the correct dialing procedure. Procedures for very high security locks like Group 2M, Group 1 and Group 1M are too complicated to show. If you have this type of lock, call us while you are standing next to your safe for additional instructions.

Dialing Procedure Checklist for Mechanical Combination Safe Locks

  • Dial to the indicator mark which is at the 12:00 position, not the one at 11:00.
  • It does not matter where you start from; it makes no difference which number is at the indicator mark when you start.
  • You do not go past the number 4 or 3 or 2 times, you go to the number 4, 3 or 2 times.
  • When you come to the number you are dialing to, you must be accurate – plus or minus one half of the space to the next mark. If you go farther than that, start over. (Older locks are typically a little more forgiving.)
  • If you go slightly past the number you are dialing to, it is not ok to just back up those few numbers. If you go past that number, you need to start the dialing procedure over.
  • Old lock technology was not as good as it is now, and your lock may be worn out. They might make lots of noise and they might not turn smoothly. They may not have been serviced in 50 years, during which time the lubrication can turn sticky. When dialing old locks, slow is best.
  • If you think you have the combo but cannot get it to work, especially with an old safe, try the numbers you have 10 times. When you get to the last number, try jiggling the dial back & forth. It sometimes helps to tap on the safe door while dialing. Do not force the dial.

How Do I Open My Combination Lock Safe?

Group 2 Locks with 3 Wheels

How To Crack An Old Mosler Safe

98% of all Group 2 locks have three “wheels” inside. This procedure will work for all of them:

  • Left to 1st #, 4 times
  • Right to 2nd #, 3 times
  • Left to 3rd #, 2 times
  • Right to Stop
  • Turn safe handle

More detailed instructions:

  • Turn the dial Left (counter clockwise) to the first number 4 times
  • Turn the dial Right (clockwise) to the second number 3 times
  • Turn the dial Left to the third number 2 times
  • Turn the dial Right until the dial stops. If you dialed correctly, the dial will stop in less than one full turn. You will feel the lock “engage” about eight numbers before it stops.
  • Manufacturer’s combination cards often show a fourth number – this is the same number at which the dial will stop.

Group 2 Locks with 4 Wheels

These locks are rare; it is very unlikely you have one of these.

  • Right to 1st #, 5 times
  • Left to 2nd #, 4 times
  • Right to 3rd #, 3 times
  • Left to 4th #, 2 times
  • Right to stop
  • Turn safe handle

Sentry Brand Safe Locks

Sentry safes are the most common safes on the market. A small number of these have Group 2 locks, but most have direct entry lock systems which use the following procedure. A very small number start to the right, then left, then right.

  • Left to 1st #, 3 times
  • Right to 2nd #, two times
  • Left to 3rd #, one time
  • Turn safe handle. If there is no safe handle, then turning the dial back to the Right again will unlock the safe.

Gardall Brand Microwave Safes & Other Recent Korean and Chinese Low-End Fire Safes

In addition to the dial, these usually have a thumb turn or key that draws back the safe bolts. If the sequence below does not work, reverse the directions so that you start to the left. On these safes the dial won’t automatically come to a stop on the last movement – you need to dial to the number and stop.

  • Right to 1st #, 4 times
  • Left to 2nd #, 3 times
  • Right to 3rd #, 2 times
  • Left to 4th #, 1 time
  • Draw bolts back with key or thumb turn

Victor Brand Safes

Victor brand safes are a common brand of antique safes. Most have no turn handle, just the dial. Original factory instructions showed the first sequence shown below, possibly to give the illusion that these units are more secure than they are. Locksmiths often re-wrote the combinations to a simpler procedure, the second version shown.
Version 1:

  • Right to 1st #, 4 times
  • Left to 2nd #, 3 times
  • Right to 3rd #, 2 times
  • Left to 4th #, 1 time
  • Turn right to draw back the safe bolts to unlock the safe. If there is a safe handle, turn it after going to the last number.

Version 2:

  • Right to 1st #, 3 times
  • Left to 2nd #, times
  • Right to stop. The last move to the right draws back the bolts to unlock the safe.

Antique Safes by Cary Safe, Detroit Safe and J. Baum Safe

Cary, Detroit, and J. Baum brand antique safes most often use the same sequence as Group 2 locks, even though they are not Group 2:

  • Left to 1st #, 4 times
  • Right to 2nd #, 3 times
  • Left to 3rd #, 2 times
  • Right to Stop
  • Turn safe handle

Antique Safes by National Safe and Hall Safe

Antique National brand safes normally use the following procedure, while antique Hall units normally use the reverse of it. If you try one sequence and it does not work, try the other.

  • Right to 1st #, 4 times
  • Left to 2nd #, 3 times
  • Right to 3rd #, 2 times
  • Left to 4th #, 1 time
  • Turn safe opening handle

Reverse Instructions:

  • Left to 1st #, 4 times
  • Right to 2nd #, 3 times
  • Left to 3rd #, 2 times
  • Right to 4th #, 1 time
  • Turn safe opening handle

Top-Opening Fire Box Safes

Top-opening fire boxes by Hercules, Meilink, and others were very common until about the 1960’s. Usually they are green or brown with handles on both ends. The ones with combination locks normally have dials ranging from 25 to 50 numbers. With some of these you start by going Right first and with some you go Left first, so try both ways.

  • Left to 1st #, 3 times
  • Right to 2nd #, 2 times
  • Left to 3rd #, 1 time
  • Lift cover. With some models the latch is under spring pressure, so when you get to the last number, keep turning pressure on the dial while lifting the cover.

Small Antique Safes

Very small antique safes (12” to 22“ tall) without opening handles, manufactured by Meilink and others, frequently use the following sequence. If this does not work, try the reverse. If a little safe like this has a T-handle, turn the handle after dialing to the last number. Some of these T-handles are actually turning a big screw that tightens the door. If that is the case you will need to turn it about four full turns.

  • Right to 1st #, 3 times
  • Left to 2nd #, 2 times
  • Right to stop. The last move draws back the bolts to open the safe – or if you have one of those with the screw mechanism, it allows the screw to turn.

McNeal & Urban Safes

McNeal & Urban safes used letters rather than numbers on the dial. They usually work as follows:

  • Right to 1st letter, 4 times
  • Left to 2nd letter, 3 times
  • Right to 3rd letter, 2 times
  • Left to 4th letter, 1 time
  • Right to stop.

Other Antique Safes

Antique safes are sometimes found with the following procedure, or the reverse of it. This is usually the result of something done in the field by a locksmith. Worth trying if nothing else works. The dial may come to a stop by itself, or you might need to turn to it.

  • Left to 1st #, 5 times
  • Right to 2nd #, 3 times
  • Left to 3rd #, 2 times
  • Right to 4th #, 1 time

I Still Can’t Open My Safe

If you still cannot get your safe open after trying the different methods above, you will probably need to bring the safe to our shop or have us come to your location. Call us while you are standing by your safe and we will assist you. Our schedule is normally quite full, so don’t wait until you are in an emergency situation. For instance, if you are going on vacation tonight and you cannot get to your passport because you cannot open your safe, you may not be going on vacation after all!

Posted On by Ralph

When a safe won’t open, it could be for any number of reasons. But the goal is always the same. You need to know what to do to get back inside your locked safe. There are many things that people don’t know about safes, but the what you can do when your safe won’t open always remains the same. There is a bit of information that you will need to gather so that you are better prepared to regain access to your locked safe. And at any point, you can choose to call a locksmith to assist you. But here is what you need to do when you are locked out of your safe.

Determine Your Type of Safe

Knowing what type of safe you have is incredibly important to finding out what your next step is. In cases where you are looking to open your locked safe yourself, you can’t find the relevant information when all you know is, “my safe won’t open”. If you know the brand name, even this can help you when you’re locked out of your safe.

The brand name of the safe is often quite easy to find. Most likely there will be a company logo on the front door of the safe. However, sometimes the logo will not include the name of the manufacturer, instead, it may just have some form of decal or illustration. But most will have large painted letters spelling out the company’s name.

Game yakyuken special psx stocks. If your safe won’t open, and there is no clear brand name, the next step is to look for any type of purchasing information. If that cannot be found, you can take a look at the type of construction and size of the safe. There is a chance that a safe won’t open is not a safe at all, rather it is a lockbox. Lockboxes and safes are two different devices, but either can be accessed by a professional.

This leads me to the final bit of advice. If you do not know what type of safe you are dealing with, call a safe locksmith. Just tell them that, “my safe won’t open”, and your job is as good as done. They will diagnose the issue and make sure that you are not locked out of your safe a moment longer than necessary.

How to Change the Combination to a Mosler Safe   Hunker

Why Are You Locked Out?

Sure, your safe won’t open, but that is the symptom, not the diagnoses. In order to get back into your locked safe, the precise nature of the safe lockout has to be uncovered. A professional will, of course, be able to tell you why your safe won’t open. However, if you are looking to find out for yourself, you may need to troubleshoot the issue.

The reason may be quite straightforward. If the safe uses a key, and you broke the key off in the lock, all you need to do is remove the broken key. After that, you will most likely need to have a new key made in order to see if the safe won’t open still. Or perhaps your electronic lock ran out of batteries and you cannot use the code to open it.

Similarly, if you know that you have forgotten the combination or code to the safe, then you know your safe won’t open. In cases like this, you can check the safe literature to see if there is a reset code that you can perform without opening the safe. The chances of this are slim, and if this method entry works, you should look into getting a more secure safe. In the likely chance that your safe won’t open by these means, there will be more work to be done.

Other issues such as detached bolt work, or jammed internals, can be assessed when you try to move the safe handle to unlock the device. You know the safe won’t open, but if the handle spins like it should, then there is an issue with the bolt work of the door. The bolts may also be jammed if the handle will just not move far enough, but does still move.

Safe Bouncing

If you have made the mistake of purchasing a substandard safe from any of the companies that security experts don’t recommend, or invested in a product that is fire resistant but not burglary resistant, you may be able to bounce your safe. If your cheaply built safe won’t open by the proper means, it may still open this way. Look at the different types of safes, to get a better idea of what type of protection you have.

This method of entry is the most basic form of safe entry, but it can only be used on safes with functioning bolt work. If your safe won’t open, due to an issue with you forgetting or not having access to the combination, a broken key, or a battery that has died in your digital lock, then it can be assumed that your bolt construction is intact.

To bounce a safe, you simply strike the top of vault while turning the handle simultaneously. This act works similarly to a bump key. The internal components of the locking mechanism are temporarily oriented to their proper opening position, as the bolt work in the door jumps from the sudden impact. This is not a professional method of entry, but it does take some practice. However, if the safe won’t open, then it may be too heavy or too well made. (This is a good thing.)

Lock Overrides

How To Crack An Old Mosler Safe Lock

Overrides are installed very frequently in smaller safes with electronic keypads. If your safe is the type of product that you would see used as a hotel safe, then there is a good chance that there is an override procedure. The reason for this is that these safes are intended to have their combinations reset. As a result, many motels and hotels have to be able to get inside when a safe won’t open because a guest forgot to leave the door ajar.

Often there is a factory code that comes standard to reset these types of safes without the need to open them. The most common combination is repetitive zeros, the number of which varies, but is often the same number as the safe’s standard combination length. With nothing more than the manufacture, it is often easy to find this information. If the safe won’t open with the information you get, be sure that you have the right model number. If you do, then there is a chance that the override code has been changed on your device.

Other than code based pre-installed overrides, there may also be openings on the bottom of the safe if it was not bolted down using every pre-drilled hole. With most electronic safes, there will be a switch on the inside of the door that when flipped, allows the combination to be reset. If you can flip this switch, you can simply reset the combination. Of course, this method can be a little difficult without locksmith tools, such as a borescope. If a safe won’t open due to a dead battery, this will not work.

How To Crack An Old Mosler Safe


Safe manipulation is the type of safe cracking that you see in movies when a safe won’t open. Where a suave gentleman in a black turtleneck will hold his ear to a safe and spin the dial, opening the lock with nothing but his bare hands and a bit of finesse. Unlike in movies, it is less about having a stethoscope, and more about knowledge, practice, and natural talent. This is not a way that you can get back into your own safe unless you are highly trained. And chances are if you have read this far, you are not.

But don’t be discouraged. A professional locksmith can still open your safe this way (as long as there is a combination dial). Manual combination locks are the type of locking mechanism that can be manipulated without harming the safe. This will be necessary if you have purchased a safe or vault from any of the best safe companies. But there are forms of manipulation for a when a safe won’t open and simple touch-based manipulation is not enough.

These will harm the safe, but not in a way that demands replacing the device. In cases that demand more serious techniques, a hole will have to be drilled in the safe. Tools and probes will then be inserted to manipulate the bolt work or locking mechanism of the safe door. Of course, a safe accessed in the following way (or by similar methods) will no longer be as secure as it was. But most people will still not be able to exploit the safe via this new hole. And the hole will almost be slightly obscured. If anyone was looking to open your safe illegally in this way, they have only been saved the time it would have taken to drill the hole.

Violent Entry

In cases when you are saying, “My safe won’t open, and I need to get in now!”, you probably do not have time for the more delicate methods. In this case, you may need to subject your safe to violent entry. These ways of getting in when a safe won’t open, compromise the safe far too much to continue using it after the device is opened.

Another reason that the safe may need violent entry, is because the safe won’t open because it is far too broken. Sometimes a safe won’t open, and it is not going to open without being taken apart.

It is of the utmost importance that you do not attempt to use any form of violent entry yourself. These methods may appear to be rather basic, but the use of these tools can be dangerous if you do not understand the construction of your safe. People that try to break in when their safe won’t open by force can severely injure themselves. Leave this work to the professionals.


Now that you know what you can do when you are locked out of your safe, you will never need to say, “My safe won’t open.” You will just be able to go about fixing the issue. Never hesitate in any step of the process to reach out to a locksmith. If ever your safe won’t open, there is always someone ready to help. Feel free to call United Locksmith if you need any assistance with opening your safe. We’ll get the job done!

Category: Commercial, Residential, Safes, Safety & Security

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