How To Open Master Lock Combination Lock

Resource Description

How to open a combination lock

Table of Contents

  1. How to open Master Lock Combination Lock
  2. How to open Master Lock 975 Combination Padlock
  3. How to open Master Lock 6400SHENT ProSeries Bluetooth Shrouded Shackle Padlock
  4. How to open Master Lock 4400EC 1-29/32" Indoor Bluetooth Padlock
  5. How To reset Master Lock 175 & 176

Nowadays, we are living in a society where everyone wants their items to be safe. Locks’ series by Master Locks are ideal equipment to be sure that your items have high-quality security.

You will find out about 4 types of combination locks that are great security equipment for your valuables and items.

Master Lock 1502 Combination Padlock Only

Master-Lock

Master Lock 1502 Combination Padlock Only

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Master Lock 975 Combination Padlock Only

Master-Lock

Master Lock 975 Combination Padlock Only

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This type of combination lock is useful for the school locker, bike, or anything else you need to keep safe. If you know the combination number and follow the steps described below, you’ll open your combination lock with ease.

You can see below a simplified view of a typical three-number combination lock mechanism. The tumblers are usually called wheels. The amount of wheels in a lock is equal to the number of symbols that are used in the combination. For instance, here we can see three wheels in the lock, which is why there are three numbers in the combination.

Combination Lock scheme
four-number combination lock

Four-number combination lock

Here we can see a four-number combination lock, which means there are four wheels or tumblers in a lock mechanism.

Note! The more numbers the combination has, the better secure-quality the lock has.

In the 21st century, we got a modern type of locks that provide a better security for our items:

Master Lock 4400D Indoor Bluetooth Padlock

Master-Lock

Master Lock 4400EC 1-29/32" Indoor Bluetooth Padlock

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Master Lock 6400SHENT ProSeries Bluetooth Shrouded Shackle Padlock

Master-Lock

Master Lock 6400SHENT ProSeries Bluetooth Shrouded Shackle Padlock

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There are locks by Master Lock that can be set up with an app on your mobile device. It helps you to open the lock with the app or make-your-own combination on the lock. Such locks are a better device for your items, they also supply a security for the doors of your office, home, or other industrial places. Just scan the QR code on your mobile phone to register the padlock. It provides not only high-quality security, but also won't take much time for remembering the combination.

So, how to open such types of locks, you can see the instruction below:

How to open Master Lock Combination Lock

Step 1: When you get a combination lock, you can see the sticker with the lock’s combination number on the back of your combination lock. Write down the combination number and leave it in a place where you are sure no one can find it.

How to open a Master Lock 1502

Warning! Remove the sticker from the combination lock carefully and throw it away. Don’t leave the sticker on the lock in case someone else finds out about your combination.

Step 2:

Let’s see the parts of the lock and start opening the combination lock:

How to open a Master Lock 1502

Step 3: How to open the combination lock:

  1. Turn the dial on the lock clockwise to the right three times. Stop turning when the first combination lines up with the indicator.
How to open a Master Lock 1502
  1. Turn the dial one full turn to the left, pass the 1st combination number, and stop turning when the second combination number lines up with the indicator.
How to open a Master Lock 1502
  1. Then turn the dial to the right and stop when the third number lines up with the indicator.
How to open a Master Lock 1502

Step 4: Opening the combination lock

Pull up the shackle of the lock or pull the lock down to open the lock.

How to open a Master Lock 1502

Warning! DON’T FORGET YOUR COMBINATION! KEEP IT IN A SAFE PLACE!

Unfortunately, if you lose the combination number of the lock, you cannot reset this lock without knowing the current combination. You'll likely need to purchase a new lock.

How to open Master Lock 975 Combination Padlock

Master Lock 975 Combination Lock

Master Lock 975 Combination Lock has a wide brass body for superiorly high strength and weather ability. Two-part deadlocking defends from prying, shimming, and rap attacking and the seals of shackles defend every component for operating without troubles. The four-digit dials let you set your combination.

How to open Master Lock 975 Combination Padlock

Step 1:

Enter the combination (if it’s a factory-new lock, the combination is 0-0-0-0) and pull the shackle to open.

How to open Master Lock 975 Combination Padlock

Step 2:

Turn the shackle 90* to position 1.

How to open Master Lock 975 Combination Padlock

Step 3:

Then push the shackle down until it clicks.

How to open Master Lock 975 Combination Padlock

Step 4:

Turn the shackle another 90* to position 2.

change the combination padlock

Step 5:

Then you can change the combination to the one you want.

Pull the shackle up

Step 6:

Pull the shackle up. Verify that the dials’ remained set to the desired combination before locking. And now your lock has a new combination.

Warnings! There is no key included in the lock. That is why be careful with your combination number, DON’T forget it, and DON’T tell it to anyone!

How to open Master Lock 6400SHENT ProSeries Bluetooth Shrouded Shackle Padlock

The Master Lock No. 6400SHENT Bluetooth Shrouded Shackle Padlock has a wide metal body for durability and high-quality security. Weather cover supplies weather resistance against snow, rain, and temperature extremes. The shackle is made of boron alloy, offering maximum resistance to cutting and sawing.

Way №1: Unlock with mobile device

How to open a Master Lock 6400SHENT Master Lock Enterprise

Step 1: Firstly, you must create an account at enterprise.masterlockvault.com. Then download the Master Lock Vault Enterprise app. on your Android or iOS device, launch the app, and sign in.

Step 2: In the Master Lock Vault Enterprise app. touch the sign (+) in the upper-right corner. Scan the QR code, from the gray box located above, on your mobile device to register the padlock. Touch the name of the padlock to access the details of the padlock and manage additional settings.

Step 3: Your padlock is in Wake Touch mode. Press any button on the keypad to unlock the padlock.

open a Master Lock 6400SHENT

Step 4: The padlock will appear under the Awake Tab in the app. Touch the blue icon 🔑 to unlock the padlock. When the light turns green, you have 5 seconds to open the padlock or it will relock.

Way №2: Unlock with padlock keypad

Step 1: Enter the code, which is located in the black box above, into the padlock keypad and press the enter button.

Step 2: When it turns green, you have 5 seconds to open the padlock or it will relock.

How to replace the battery on your padlock:

Step 1: Low battery will be indicated by a yellow light on the padlock or through the app.

Step 2: Open the battery compartment, which is on the bottom of the padlock with a flat-head screwdriver and remove the battery.

Step 3: Install the new CR123A battery, making sure that the positive and negative sides are facing the proper direction as indicated on the battery compartment.

Step 4: Close the battery compartment and tighten the screws.

How to open Master Lock 4400EC 1-29/32" Indoor Bluetooth Padlock

The Master Lock No. 4400EC Bluetooth Padlock has a wide metal body for durability. The shackle is made of boron alloy, offering maximum resistance to cutting and sawing.

Way №1: Unlock with mobile device

master lock enterprise

Step 1: Firstly, you must create an account at enterprise.masterlockvault.com. Then download the Master Lock Vault Enterprise app. on your Android or iOS device, launch the app, and sign in.


Step 2: In the Master Lock Vault Enterprise app. touch the sign (+) in the upper-right corner. Scan the QR code, from the gray box located above, on your mobile device to register the padlock. Touch the name of the padlock to access the details of the padlock and manage additional settings.

Step 3: Your padlock is in Wake Touch mode. Press any button on the keypad to unlock the padlock.

Step 4: The padlock will appear under the Awake tab in the app. Touch the blue icon 🔑 to unlock the padlock. When the light turns green, you have 5 seconds to open the padlock or it will relock.

How to open a Master Lock 4400D

Way №2: Unlock with padlock keypad

Step 1: Enter the primary code shown above by pressing (up, down, left, right) directions on the padlock keypad.

Step 2: When the padlock lights green, you have 5 seconds to open the padlock or it will relock.

How to replace the battery

Step 1: The yellow light on the padlock indicates a low battery.

Step 2: Unlock and open the padlock. Pull out the battery drawer and remove the old battery.

Step 3: Install a new CR2450 battery with (+) side facing the back of the padlock.

Step 4: Close the battery drawer.

If you follow all the steps correctly, it won’t be so hard to open the padlock. Keep your items and doors safe!

How To reset Master Lock 175 & 176

Master Lock 175 and 176 brass locks are common choices for areas that have harsh weather or during the rainier season, due to their metal alloy made of copper and zinc that make these locks very durable.

Brass Master Locks are one of the most economic choices for your security needs, and due to the alloy’s durability brass padlocks are ideal for caustic and marine environments. Master Locks 175 & 176 are almost identical. The main benefit of purchasing a 176 is that it has a control key override just in case you don’t have the combination.

To reset the 175 & 176 you will go through the process using a K175 reset tool.

How To reset Master Lock Combination lock

Step 1: Open the lock with the factory or previously set combination. The lock must be set to the current combination, or you can’t reset it.

How To reset Master Lock Combination lock

Step 2: Insert the reset tool in the hole on side of the lock, push it in, and turn 90 degrees in either direction. The reset tool automatically stays in this position.

How To reset Master Lock Combination lock

Step 3: With the change tool in the lock, set the wheels to your desired combination.

How To reset Master Lock Combination lock

Step 4: Turn the reset tool back 90 degrees and remove it. The lock is now set to your new combination.

How To reset Master Lock Combination lock

Now your lock may be opened when you put in your new combination. Make sure to save your specific combination.