Unlocking and disassembling and cleaning the WEST5500 auxiliary lock

"I accidentally closed an unused key."

Entrance auxiliary lock that has not been used for about 5 years.When I accidentally closed it, it stopped working.In other words, he said he couldn't get out of the front door.

It's a West thumb-latch, and pretty old-fashioned.I couldn't enter through the front door, so I entered through the side vent.

It was unlocked by disassembling the thumbturn and forcibly turning the deadbolt.However, it was quite dirty, and it was improved by cleaning and greasing.

By cleaning the cylinder exclusively, the operation of the auxiliary lock has been restored for the first time in five years.