PR.PGF714 Inspection and repair due to malfunction of cylinder

"There are times when it is difficult to insert the key and it does not turn"

When I arrived at the scene, it was MIWA push-pull grip handle lock PR.PGF714.

This is a common example of malfunction occurring the day after heavy rain. We presented an estimate for cleaning work without disassembly and cleaning work after disassembly, and we decided to wash the cylinder without disassembly.

It seems that 15 years have not passed, but considerable dirt comes out. It was improved by washing carefully for about 15 minutes.