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You have to have a combination. If you have a key lock you don't need a combination, all it is is a lock that says master and a key to turn it and then it opens what you have in it.
I'm not sure which master lock you are asking about, but see related links below for methods of opening combination locks
use a fire hyderant and bang it in a downward motion hitting the lock. do this a couple of times and it should do the trick.
It depends on the make of the lock. Many time you need to know the combination. Sesame locks require a pin that goes in the shackle hole when the shackle is 180 degrees from open. Master combination locks with a scroll combination require a reset key that can only be used when the current combination is known in order to change. Other padlocks require the lock to be open and the shackle turned 180 degrees and pushed down while setting the combination.
need number changer .. you know helpme ok smile AlthoughI don't have a 646 in hand, locks of that style generally accept new combinations as follows: 1. Open the lock.2. Rotate the shackle 180 degrees so that it is parallel with the body of the lock -- just as though you were about to close it, but with the shackle facing the wrong way.3. Push the shackle in, as though you were closing lock.4. Hold it in and set the new combination. (On some models, you will not have to hold the shackle in place.)5. Release the shackle. (Or, if you did not have to hold it in, pull it up.) The new combination should now be set. As with all such products, test it before locking it onto an item.
If you set this combination, then nobody else would know it - that's the whole idea .
Master lock
If you do not have the combination, there is no way to open the lock. A master combination would defeat the purpose of having the lock.
With the combination
You have to have a combination. If you have a key lock you don't need a combination, all it is is a lock that says master and a key to turn it and then it opens what you have in it.
There is no "master combination" that can open any lock. There would be no use for the lock if that were the case.
You need to contact the lock company. They will reset it or tell you how it can be done. You may need a new password.
It will come with a slip of paper that has the specific combination to that lock. Each individual lock has it's own combination.
A locksmith will be able to provide the combination from the code number stamped on the back of the lock.
don't now and don't care
Go to 0 5 times and then 10 it should open and then if uu close you an set it to a different batch of numbers but only 3
First of all, you need to unlock it. If you don't know the current combination: it can't usually be changed. Then, you need to set your new combination and lock it. It should then be set.