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if you have forgotten the combo the only way to figure it out is to progress the combo starting from 000 and then 001,002,003,004 etc...( trying the lock at every new series until you get the correct combo. a 3 digit combo should only take about 10 to 20 minutes to solve. you can cut the time in half if you can remember the first number or the last number.
if you have totally forgotten the combo, then the only way to figure out the combo is to progress the combo -- to do this you will start from 0000 and then 0001,0002,0003,0004 etc.. all the way through until you hit the right numbers and the lock opens, ( make sure you try and open the lock at every new number ). a 4 digit combo usually takes about 1 1/2 to 2 hours to go through all the numbers. what will help in this progression process is if you can at least remember one of the numbers or better yet, remember two of the numbers.
some locksmith shops do have special tools ( readers ) that might be able to read the wheels and figure out the combo for you --- call around and ask some of the lock shops in your area if they have the ability to read the lock for you,, but if they can't - then you are back to square one ( progression ).
hope this helps,
if you have forgotten the combo the only way to get the lock to open is to ' progress ' the combo wheels. since it is only a 3 digit combo - this will take anywhere from 15 to 40 minutes.
start with 000 then 001 then 002 etc... all the way to 999 ( but you will get the combo before 999 is reached ). after the combo is found, with the latch open push the lever to the to open position and set the new combo that you want.
We are a company that uses these lock to show homes and we have 4 locks that we cant locate the combo to. This lock you put the key in and lock it back and it has a 4 combo but the person that handled these have left and didnt give us these combos...cant open them...any ideas on how to unlock these codes?
Check the MasterLock web site to see if they still offer to provide for forgotten combinations. Some years ago I got a combination for a standard rotary dial lock by providing the usual identification information plus a photo of the lock showing its serial number.