How do you unlock a Master combination lock if you forgot the code?
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.
How do you use a Master Lock 175?
Operating Instructions for the Master Lock M175 Combination Lock.
Enter the combination and pull the shackle to open. ... .
Turn Shackle 90° to position 1..
Push shackle in to lock until it clicks..
Turn shackle another 90° to position 2..
Set dials at black indicator line to desired combination..
Pull shackle up..