TOSTEM Egg Repair of malfunction due to damage to shutter coil spring

"I can see something like a spring from the keyhole, and the key does not stick, so I would like to check it."

If there is a spring visible from the outside, that part is limited.This is because the inside of the cylinder cannot be seen by the general public.

If so, I wondered if it was a defect around the shutter.

Upon confirmation at the site, the repair target was the TOSTEM egg on the upper cylinder.The lower side was replaced with a WEST 916 cylinder.

When disassembled, one of the coil springs of the shutter is deformed and pops out.Such symptoms are rare.I removed this spring and completed it as a first aid.

Since this is a rental property, the replacement work has been postponed.Please replace it as soon as possible.