LPS or Liquid Wrench down the shaft and up into the keyhole. Give it a couple more taps with the hammer. Insert the key and work it from side to side while compressing the lock. With combination locks keep rolling the numbered tumblers around and around and then set them on the proper combination and try to open.
What do you do when your Master lock won’t open?
Please try resetting the lock again by following the instructions below:
- Place lock in the open position.
- On the back of the lock, slide the reset lever into the “up” position.
- Insert the shackle into the lock and squeeze firmly twice to “clear” it.
- Pull up on the shackle to open the lock.
- Enter your new combination.
What do you do if your lock combination is stuck?
Put lubricant on the shackle and dial parts if your lock freezes up in the winter. Apply the lubricant sparingly — you need just a few drops. Let the lubricant sink far down into the lock. Knock the lock gently against a table to spread the fluid throughout the lock and loosen up any frozen or stuck parts.
Why isn’t my lock opening?
Use silicone thread lubricant to moisten the jammed lock, making it easier to insert the key. Consider putting a small dot of graphite in the keyhole if the lock still does not open. Once you have applied graphite to the key, try to open the jammed lock at least four times so the graphite has a chance to work.
Can Master locks be cut?
Master combination locks have a hardened steel shackle that cannot be cut with a standard hacksaw blade. If you have a Master Lock that is closed and you lost the key or forgot the combination, you can cut it off yourself in just a few minutes with the right tool.
How do you reset a Master Lock?
To set or reset the combination on your 175, 176, 177, or 178 Master Lock padlock:
- Open the lock using the previous combination.
- Insert the reset tool in the hole on the side of the lock.
- Push the reset tool in and turn 90° in either direction.
- Set wheels to your new combination.
- Turn and remove the reset tool.