master lock serial number list with combination

#Master lock serial number list with combination serial numbers

Write down the magic number (3 in this example).ĩ-Find the possible first numbers of the combination. Remember we are only concerned with the remainder, which will always be 0, 1, 2, or 3. Divide the third number of the combination (27 in this case) by four and write down the remainder. This is the third number of the combination.Ĩ-Find the magic number. Four of the remaining five numbers will share the same number in the 'ones' place, so for example, if the numbers left on the list are 4, 14, 24, 27, and 34, the number 27 is the only one which does not have a four in the 'ones' place. Of the remaining sticking points, choose the one with the unique digit in the 'ones' position. You should eliminate 7 of the 12 numbers with this step. Look at your list of sticking points and eliminate all those which are not whole numbers (i.e. Write them down.ħ-Find the third number of the combination. You should find a total of twelve sticking points in one complete turn of the dial. Turn the dial clockwise about one number from the sticking point in order to allow you to 'escape' that sticking point.Ħ-Reapply tension to the shackle and continue turning the dial clockwise to find all the sticking points. A range of 22.5 and 23.5 would have a sticking point of 23.ĥ-Release shackle tension and turn the dial slightly past the sticking point. A range of 4 and 5 would have a sticking point of 4.5. Now you have a sticking 'range.'ĭetermine the sticking point by finding the number that's in the midpoint of the sticking range. While continuing to apply tension to the shackle, turn the dial as far left (counter-clockwise) as you can. If so, record the number to the half (e.g. Sometimes it will stick right on the numbers, but sometimes it will be between the numbers. If you can’t turn the dial at all, release the shackle and turn the dial clockwise just a number or two and then try it again.Īs you turn the dial clockwise with tension on the shackle, you will come to a point where you can’t turn the dial anymore. Turn the dial slowly as you apply tension. To apply tension you can either pull the shackle up while holding the lock, or you can pull the lock down if the shackle is locked onto something solid. The shackle is the u-shaped part of the lock that goes around whatever you’re locking. It is a good idea to turn it at least three rotations first, just to make sure it’s clear.ģ-Apply steady tension to the shackle and turn the dial clockwise.

#Master lock serial number list with combination serial numbers

It is rumored that Master Lock changed the combination algorithm on some of the newer locks, in particular those with serial numbers starting with the number 800.Ģ-Turn the lock’s dial clockwise to zero. This method only works with Master Lock combination locks, and may not work with all of them.