Cylinder replacement due to HMD malfunction

"I hope to check it because the key is no longer locked from the inside."

I could not understand the contents of the defect well on the phone.When I arrived at the site, it seemed that the thumbturn and the latch bolt were moving at the same time, and the dead bolt did not come out completely.It was a phenomenon that moved at the same time.I have experienced this somewhere, but I can't remember the cause.

I decided to disassemble it for the time being.The spindle shaft does not slip 360 degrees. It can only swing 90 degrees.Further disassembly confirmed that one of the two springs was damaged.The spring is caught and causes malfunction.

This is a common phenomenon with defective HMD.145LS.This time, the knob on the cylinder side is replaced and it is completed.