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Q: How do I set or reset a Master Lock combination padlock that has a ... Q: How do I change the combination on a Set-Your-Own combination lock model #643D?
Begin by opening your Combination Lock Box. To open a new lock box for the first time: Move all 3 digits to 0-0-0. Make sure all digits are centered on the ...
To set a new combination:
The initial combination is set at the
factory to 0-0-0-0
1. Open the compartment door
2. Push the reset lever left and down.
The lever remains in this position
3. Rotate dials to your desired combination
4. Push the reset lever, up and right, back
to the original position
5. Close the key storage compartment door
6. Scramble the combination dials to lock
the door and conceal your combination
7. Close the shutter door
1. Open the lock with the factory preset combination of 0005.
2. Find the tab on the end of the part of the locking mechanism that has the numbers.
Combination Reset Tab
3. Flip the tab up (with the combination set to the open combination). When you flip the tab up, you disengage the number dials from the tumblers, so that you can reset the combination without changing the position of the tumblers.
4. Change the combination to the desired combination.
5. Flip the tab back down. The dials are now re-engaged with the tumblers.
Open the lock using the original combination, which was 0000 for mine. Once open, you will find two tabs on the lock side--on top and bottom of the lock portal. Push in both tabs, and hold them down while you set the new combination. Once it is set, put the post back in to make sure it is still open. Twist the dials to lock it, and then you should be able to unlock using your new combination.
Here is the manual: http://www.blackburndesign.com/blackburn/wp-content/themes/blackburn//manuals/cyclometers/atom_SL_3.0_5.0_6.0.pdf If you cant find an answer, you can contact them at: http://www.blackburndesign.com/customer-service/blackburn/contact-us
You cannot reset the lock unless you know the combination. You would need someone to pick the lock, like a locksmith and then once it's open you can reset the lock with a new combination.
Instructions:
Opening the key storage
compartment door
1. Open shutter door to reveal the dials
and the release button
2. Rotate dials to the current combination
(if the lock is new, the combination is set
at the factory to 0-0-0-0)
3. Press down on the release button
to open the door
4. Pull the door fully open
5. Add or remove keys
6. Close compartment door
7. Scramble the combination dials to lock
the door and conceal your combination (A)
8. Close the shutter door (B)
To set a new combination:
The initial combination is set at the
factory to 0-0-0-0
1. Open the compartment door
(see instructions above)
2. Push the reset lever left and down.
The lever remains in this position
3. Rotate dials to your desired combination
4. Push the reset lever, up and right, back
to the original position
5. Close the key storage compartment door
6. Scramble the combination dials to lock
the door and conceal your combination (A)
7. Close the shutter door (B)
To hang shackle model
1. Open the compartment door
(see instructions above)
2. Push the shackle release lever to the left
to open shackle
3. Pull the shackle up and out of the lock
4. Place shackle around door knob or other object
5. Close shackle to lock
6. Close the compartment door
7. Scramble the combination dials to lock
the door and conceal your combination (A)
8. Close the shutter door (B)
Reminder:
(A) The release button will open the lock
until you scramble the dials
(B) Keep the shutter door closed to increase
weather resistance and to conceal the
dials from view
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