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Frequently Asked Questions
Q:
I've lost the combination to my "Set-Your-Own" combination lock. Can you tell me what it is?
A:
Resettable combination locks have a combination that is assigned by the owner of the lock. Therefore, Master Lock does not have record of the combination that the owner set. The lock cannot be reset unless it is in the open position. If your lock is attached to something, you will need to call a locksmith for removal. Please note that Master Lock does not reimburse for Locksmith services and/or fees.
 
Q:
How do I open or reset my TSA Approved Master Lock Travel Sentry Certified lock Model # 4680DBLK or # 4680DNKL?
A:
Click here for instructions on how to change/reset the combination for your TSA Approved Master Travel Sentry™ Certified lock.

Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
 
Q:
How do I change the combination on a "Set-Your-Own" combination lock model #643D?
A:
Here are the instructions for changing the combination on your model 643D lock. This lock is preset at the factory to operate at 0-0-0-0.

1. With dials at 0-0-0-0, pull out the shackle.
2. Turn shackle 90 degree (1/4 turn) so notch on shackle is aligned with notch in lock body.
3. Press and hold the shackle down.
4. Set the dials to your own combination by lining up middle of numbers with red stripe.
5. Lift and return the shackle to closed position.
6. Scramble the dials to lock.

Note: Be sure to record your NEW combination as you are the only one that knows it!

Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!

Note: The lock may only be reset when it is in the open position. If you do not recall the combination the lock is set to, you will not be able to reset the combination.
 
Q:
How do I open a high security combination lock model 2002 or 2010?
A:
1. Turn the dial 3 times to the right and stop on the first number of the sequence
2. Turn the dial to the left, pass the second number of the sequence and stop on it the second time around
3. Turn the dial to the right and stop on the third number of the sequence
4. Turn the dial to the left until it stops
5. Hold dial at stop and pull up on shackle to open lock
 
Q:
How do I change the combination on a "Set-Your-Own" combination lock model #653D?
A:
Here are the instructions for changing the combination on you model 653D lock. This lock is preset at the factory to operate at 0-0-0-0.

1. With dials at 0-0-0-0, pull out the shackle
2. Turn shackle counterclockwise 90 degree (1/4 turn)
3. Continue pressing shackle down and turn another 90 degree (1/4 turn)
4. Set the dials to your own combination
5. Turn shackle clockwise back to the original 90 degree position, lift and return shackle to closed position

Note: Be sure to record your NEW combination as you are the only one that knows it!

Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!

Note: The lock may only be reset when it is in the open position. If you do not recall the combination the lock is set to, you will not be able to reset the combination.
 
Q:
How do I set or reset the combination on my Fortress "Set-Your-Own" combination locks model 622D & 627D?
A:
1. Open the lock (preset at 0–0–0).
2. Turn shackle counterclockwise 180 degree and press it down. You must
    hold the shackle down while performing the next step.
3. Set the dials to your new combination.
4. Lift and return the shackle to the closed position.
 
Q:
How do I set or reset a Master Lock luggage lock that has a resettable “Set-Your-Own” combination? I would like to reset the lock to a different combination, but have lost the instructions for this. Can you help me?
A:
Click on the PDF below that matches your lock model number for instructions on how to change/reset the combination:
Model # 620 and 630 Luggage Lock
Model # 646 and 647 Luggage Lock
Model # 4680 TSA Approved Master Travel Sentry™ Certified lock
Model # 4684 TSA Approved Master Travel Sentry™ Certified lock
Model # 4687 TSA Approved Master Travel Sentry™ Certified lock
Model # 4688 TSA Approved Master Travel Sentry™ Certified lock
Model # 4691 TSA Approved Master Travel Sentry™ Certified lock  
Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
 
Q:
Someone was playing around with my resettable combination lock and accidentally reset the combination. Now, I don't know the correct combination. Is there any way to reset this lock back to "0" and assign a new combo?
A:
Unfortunately, this lock is not resettable without knowing the combination that was assigned by the owner. It's most likely that you will need to purchase a new lock.
 
Q:
How do I set or reset my "Set-Your-Own" combination lock model 179LH?
A:
Here are the instructions on how to change the combination to your model #179 lock:

To Open: Turn each digit to "0" and depress shackle.

To Lock: Depress Shackle. Scramble digits.

Important: When changing to new combination, dial setting must remain on old combination!

Before leaving the factory, your combination padlock has been set to open at 0-0-0-0.

To Reset a New Combination:
  • Open Lock and expose shackle hole.
  • Leaving digit wheels on old combination, insert attached combination changing tool and press it as far as it will go. turn the combination tool 180 degrees until it is aiming at the shackle. Warning: If the combination changing tool is not fully depressed, a lost combination will result!
  • Set digits to your own personal combination and make sure the numbers are perfectly in line with the indicator.
  • Return combination changing tool 180 degrees and remove.
  • Depress shackle. If shackle cannot return to locking position, the change of combination is not successful. Adjust the dials so that they are lined up exactly with the indicator.
  • Spin the dials.
Note: Please make sure you record your NEW combination in a safe place since you are the only one that knows it!

Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
 
Q:
I've forgotten the combination to my standard dial combination lock. How do I obtain the combination for personal use?
A:
A) My lock does not have a serial number:

     To provide enhanced long–term security, Master Lock has discontinued imprinting a serial number on the lock body on combination locks sold through retail locations. For greater convenience, we encourage consumers to store their combination at our secure website, examples of a serial number if you are unsure if your lock features one.

B) My lock has a serial number:

Please see examples of a serial number if you are unsure if your lock features one.

Choose from one of the two options below to obtain your combination:

Note: Due to increased security concerns nationwide, Master Lock recognizes the heightened need for additional safety measures. We no longer provide lock combinations in response to phone, fax, or email requests.

1) Visit a Master Lock Distributor/Retailer
  • Bring the lock to a Master Lock distributor or retailer. The lock must not be attached to anything.

    IMPORTANT: If the lock is not brought to the retailer or distributor, we will not release the combination.
  • Ask the distributor or retailer to contact Master Lock for the combination on your behalf and we will validate ownership through them. US distributors may call 1-800-308-9244. Canadian distributors may call 1-800-227-9599.
  • Please note that although Master Lock does not charge for this service, some distributors or retailers may charge a fee.
- OR -

2) Submit a Lost Combination Form
  • Confirm that your lock features a serial number prior to submitting a Lost Combination Form. Please see examples of a serial number if you are unsure if your lock features one.
  • Print out the Lost Combination Form from a PDF file.
  • Have your Lost Combination Form notarized by a Notary Public to prove you are the owner of the lock. You can include up to 6 combinations on one notarized form.

    Note for inmates at a correctional facility: In addition to the Lost Combination Form, you must submit your request on official prison facility letterhead. In lieu of notarization, the Lost Combination Form must be signed by a prison facility official.
  • Submit your form to: Master Lock Warehouse
    1600 W. La Quinta Rd
    Suite/WHSE # 1
    Nogales, AZ 85621
  • Once the request is received, your combination will arrive in approximately 4-6 weeks.
Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
 
Q:
What is a Notary Public?
A:
A Notary Public is a state official authorized to witness the signing of important documents such as acknowledgements and jurats, administer oaths and affirmations, certify affidavits or depositions, and certain other powers as provided for by law. You can usually find a Notary at your bank and/or library (please call ahead).
 
Q:
What should I do if I can't get a legible photocopy of my lock?
A:
We suggest that you lighten the copy as much as possible. If you can not read the serial number after you make the copy - that is ok, just write it on the side of the copy. What we need more importantly, is to clearly see that it is not attached to something.
 
Q:
My hardware store or home center no longer provides combination look-up service. What should I do now?
A:
Refer to the answer above for our lost combination policy.
 
Q:
How can I obtain my lost combination when my lock is attached to my locker, bike, cabinet, etc.?
A:
For security reasons Master Lock will not provide lost combinations if the lock is attached to anything.
 
Q:
How long will it take to receive my combination?
A:
It will take approximately 4 - 6 weeks for you to receive your combination once we receive the information.
 
Q:
I live outside of the US, can you e-mail the combination to me?
A:
Due to increased security concerns nationwide, Master Lock recognizes the need for additional safety measures. Click here to forward a note to our E-Commerce Team for further instructions.
 
Q:
What is the dialing sequence to open a standard combination lock?
A:
Please follow the steps outlined below:
  • Turn the dial 3 times to the right and stop on the first number of the sequence.
  • Turn the dial to the left, pass the first number of the sequence and stop on the second number.
  • Turn the dial to the right and stop on the third number of the sequence.
  • Pull up on the shackle.
  •  
    Q:
    How do I open a Titanium Series combination padlock model #2050XD or 2051XD?
    A:
    1. Turn the dial 3 times to the right and stop on the first number of the sequence
    2. Turn the dial to the left, pass the second number of the sequence and stop on it the second time around
    3. Turn the dial to the right and stop on the third number of the sequence
    4. Push the button while pulling the shackle
     
    Q:
    How do I set or reset the combination for my Sports Series Ultra Combo (ML285) 5 ft x 12 mm cable combo lock?
    A:
    Click on the following PDF file to download instructions on how to set/reset the combination for your lock.

    Master Lock Sports Series Ultra Combo Cable Lock Instructions


    Note: Be sure to record your combination. Store in safe location.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    I've lost the reset tool for changing the combination on my resettable lock model 175, 176, 177, or 178. How can I get a new one?
    A:
    Contact your local hardware store or locksmith. (Master Lock's part number for the reset tool is K175).
     
    Q:
    Can Master Lock reset my "Set-Your-Own" combination lock and send it back to me?
    A:
    Unfortunately, your lock is a "set-your-own" combination lock. Once you have set the combination, we cannot reset it for you!
     
    Q:
    Our health club needs to obtain more than 6 combinations for our locks. How can I get them?
    A:

    Requests for more than 6 combinations are considered a chart. Fax your request on official letterhead along with the completed Chart Request Form to 1-800-308-9245. The cost for hardcopy charts or charts on CD is $50. A remittance request for the fee will accompany your chart. E-Mail charts are free of charge ($100 if full history is requested). Please allow up 2-4 weeks from the receipt of your request to process your chart.

     
    Q:
    How do I set or reset a Master Lock combination padlock that has a resettable “Set-Your-Own” combination? I would like to reset the lock to a different combination, but have lost the instructions for this. Can you help me?
    A:
    Click on the PDF below that matches your lock model number for instructions on how to change/reset the combination:
    Model # 1500iD Speed Dial Combination Padlock
    Model # 1590 Precision Dial Combination Padlock
    Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I set or reset the combination on a "Set-Your-Own" combination brass padlock model 175, 176, 177 or 178?
    A:
    Models #175, 176, 177 and 178:
    • Open lock with the factory set or previously set combination. The lock must be set to the current combination, or you cannot reset it. Note: the shackle must be in the open position to reset the combination.
    • Insert reset tool (enclosed in package) in hole on side of lock.
    • Push reset tool in and turn 90 degrees (in either direction). Reset tool automatically stays in this position.
    • Set wheels to desired combination.
    • Turn and remove reset tool. Lock is now set to new combination.
    • Record your new combination in a safe place.
    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I change the combination on my key, mini or portable safe?
    A:
    Instructions for Set-Your-Own Combination Key, Mini, or Portable Safes: Model # 5400D Portable Key Safe
    Model # 5401D Wall Mount Key Safe
    Model # 5404DHC Wall Mount Single Key Safe
    Model # 5406D Portable Key Safe
    Model # 5408D Portable Mini Safe
    Model # 5408DCAMO Portable Camo Mini Safe
    Model # 5422D Portable Lock Box
    Model # 5423D Wall Mount Lock Box Model # 5900D/5900DWHT Portable Safe
    Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I set or reset the combination on my "Set-Your-Own" combination bike or cable lock?
    A:
    Please look for specific directions under the model number of your lock.

    Model #8114:

    • Open the lock & withdraw the cable.
    • Turn the collar (circular, ribbed & in front of the combination wheels) - clockwise until it stops (about halfway around).
    • Set the combo wheels to your desired combination.
    • Turn the collar counterclockwise until it stops at its original position.
    • Record your new combination in a safe place.

    Model #8119, 8120, and 8122:
    • Open the lock and withdraw the cable.
    • Flip the small reset lever by the combination wheels to the "up" position.
    • Set the combo wheels to your desired combination, making sure the numbers are lined up with the marks on the case.
    • Flip the reset lever "down" to the starting position.
    • Record your new combination in a safe place.

    Model #8280 (Pro-Sport):
    • Press the button and remove u-bar from lock body.
    • Open the anti-dust cover and align the opening combination to the guide points.
    • Push the red button towards notch in body. Hold down (there should be a clicking sound).
    • Turn the dials to your desired combination.
    • Pull back reset button to its original position. The lock should now be reset to your new combination.
    • Record your new combination in a safe place.
    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I set or reset the combination on a retractable cable lock model 4603 or 4605?
    A:
    Instructions to set or reset the combination for: Model # 4603 Retractable Cable Lock
    Model # 4605 Retractable Cable Lock  
    Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    What are some suggested password combinations for "Set-Your-Own" combination lock model #643DWD and #4691DWD?
    A:
    Some of password combination suggestions can be found in within the 643DWD instructions.
     
    Q:
    How do I reset the combination on my Receiver Lock with Key Safe, model 1467DAT?
    A:
    Click on the following PDF file to download instructions on how to set/reset the combination for your 1467DAT Receiver Lock with Key Safe.

    1467DAT Receiver Lock with Key Safe Instructions
    Note: Be sure to record your combination. Store in safe location.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I set or reset the combination on my backpack lock model #1542, 1544, 1547, 1548 or 1554?
    A:
    Here are the instructions on how to reset the combination on your backpack lock (which is pre-set at the factory to open to combination 0-0-0):

    1. With dials at 0-0-0 (or combination the lock was previously set to), push in the shackle
    2. With shackle pushed in, set your new combination
    3. Release shackle and scramble wheels to lock
    4. Be sure to record your NEW combination as you are the only one who knows it!

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!

    Note: The lock may only be reset when it is in the open position. If you do not recall the combination the lock is set to, you will not be able to reset the combination.
     
    Q:
    How do I reset a “Set-Your-Own” combination cable?
    A:
    Here are instructions for resetting your "Set-Your-Own" combination cable:

    1. Open the lock using the factory set combination of - - - - .
    2. Flip the reset lever to the up position to reset your combination.
    3. Reset the combination making sure the desired numbers are lined up with the pointer.
    4. Flip the reset lever to the down position to complete the setting of the combination, making sure you do not move the number dials.
    5. Test the new combination by fully inserting the lock prong into the cylinder hole and read the number.

    Note: Please secure your NEW combination in a safe place since you are the only one who knows what it is!

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I reset a “Set-Your-Own” Word combination cable?
    A:
    Here are instructions for resetting your "Set-Your-Own" Word combination cable:

    1. Spin the wheels until you decide on a 4 or 5-letter word for your new combination. Visit www.masterlockbike.com and select customer support for examples. Record your choice.
    2. Dial the combination wheels to read R-I-D-E-R and withdraw the cable.
    3. Turn the knob 90 degrees in a clockwise direction until it stops.
    4. Reset the combination wheels to the desired word making sure the letters line up with the marks on the case.
    5. Once you have selected your word combination, turn the knob back to the original position in a counterclockwise direction.
    6. Your new combination is now set.
    7. You may reset the combination as often as you like.

    Note: Please secure your NEW combination in a safe place since you are the only one who knows what it is!

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I set or reset the combination on my backpack lock model #1550?
    A:
    Here are the instructions on how to reset the combination on your backpack lock (which is pre-set at the factory to open to combination 0-0-0):

    1. Align dials to preset combination (0-0-0).
    2. While pushing in button located on the bottom of the lock, turn the dials to any combination you choose.
    3. Release button ONLY after you have finished choosing your combination.
    4. The lock is now ready to be used. To change your new combination again, dial your combination and repeat steps 2-3.
    5. Don't forget to write your combination down and keep it someplace safe!

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I reset the combination on my 7147D Storage Security Cash Box?
    A:
    Instructions for operating your 7147D:

    Model # 7147D Storage Security Cash Box  
    Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I change the combination on a "Set-Your-Own" combination lock model 1520D, 1523D, 1524D, or 1534D?
    A:
    Below are instructions for changing the combination on your 1523D/1524D/1534D/1534DBBR/1534DWHT/1534DBLU/1534DBLK/1534DPNK combination lock:

    1. Open lock and withdraw the shackle.
    2. Pull spring loaded metal end cap off.
    3. Remove all 4 or 5 combination wheels.
    4. IMPORTANT: Make sure the red marks remain aligned with Master logo. Install wheels so your desired combination aligns with the Master logo.
    5. Snap metal end cap back into place. (Note: If end cap will not mount properly, check wheels to make sure they are right side up.)
    6. Close shackle and scramble wheels to lock.

    Note: Please secure your NEW combination in a safe place since you are the only one who knows what it is!

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I change the combination on a "Set-Your-Own" combination lock model #643DWD?
    A:
    Here are the instructions for changing the combination on your model 643DWD lock. This lock is preset at the factory to operate at P-L-A-Y.

    1. Decide on your new 4 letter combination - choose from suggestions on reverse side or create your own.
    2. With dials at P-L-A-Y (middle of letters should be aligned with red stripe), pull out the shackle.
    3. Turn shackle 90 degree (1/4 turn) so notch on shackle is aligned with notch in lock body.
    4. Press and hold the shackle down.
    5. Set the dials to your desired combination by lining up middle of letters with red stripe.
    6. Lift shackle, return to closed position and hold shackle down while scrambling letters to lock.
    7. To re-open lock, set dials to your combination and lift shackle.

    Note: Be sure to record your NEW combination as you are the only one that knows it!

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!

    Note: The lock may only be reset when it is in the open position. If you do not recall the combination the lock is set to, you will not be able to reset the combination.
     
    Q:
    How do I set or reset my “Set-Your-Own” combination lock model M40XDWD?
    A:
    Click here for instructions on how to change/reset the combination for M40XDWD Combination Lock.

    Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!
     
    Q:
    How do I set or reset my “Set-Your-Own” combination lock model M175XDLF?
    A:
    Click here for instructions on how to change/reset the combination for M175XDLF Combination Lock.

    Note: Once the lock is set, there is no way to open it without the combination. Please make sure you record your NEW combination in a safe place.

    Store your combination at www.masterlockvault.com - a FREE service from Master Lock! The Master Lock Vault provides a safe & convenient place to store all of your confidential data for quick & easy access from your PC, iPhone, or any other mobile devices!