GOAL GF thumb-latch decorative lock, lever malfunction repair

"The lever is malfunctioning."

There are many types of levers, but the symptom was that the thumb-latch lever part of the decorative thumb-latch lock was not working properly. Although it felt a little strange, it was in normal operational condition.

The external grip body may be out of oil, or the lock case may be out of oil. Anyway, I'm going to disassemble it and isolate the cause.

The most common cause was a slight discomfort in the movement of the grip body, but no defects were found. We will grease it up to alleviate the symptoms of poor movement.

I tried disassembling the lock case in the same way, but no defects were found here either. I also greased it up just in case. The operation has been improved smoothly, so it is now complete.