AGENT-GMD500.ALPHA-TA-E cylinder cleaning repair

"The key no longer sticks."

It is said that it is a key with "AGENT" written on the dimple key. He has been deceiving and using it so far, but finally the key stopped sticking, so he asked us to take a look.

The ALPHA TA-E (TAE) lock had an AGENT GMD-500 universal replacement knob attached. The keyhole was upside down, but the pin was almost stuck due to aging deterioration (dirt).

I was able to improve it by spraying enough special oil and cleaning it.