MIWA PR-J.PGVF704+B5 Push-pull grip handle lock cylinder cleaning repair

"The key doesn't stick and it's hard to turn"

It's a new property, about 10 years old. It was in a state that I couldn't believe it was aged. The lock is an older model with a large grip handle and a B5 type security thumbturn. The current grip handle lock is a thin PGVF714+U1 crime prevention thumbturn type.

Anyway, start the disassembly cleaning work. Since it is a CP certified product, the cylinder uses grinder and hole saw countermeasures, and many quenched parts. The model number is MIWA PR-J.PGVF-SF painted silver two identical cylinder.

This cylinder is CP certified.There are washers and rings as countermeasures against breaking the lock.I've worked with it many times, but if I understand the structure, I can work through it.

Well, there was a white corroded part on the core cylinder, but it was persistent and I could not remove it.There may be reasons for this state of affairs.It was improved by cleaning it carefully, but I explained that it would be necessary to replace it when similar symptoms appeared, and it was completed.