Chainsaw Repair

I had some Carlton chains here that I sold them come back hard as glass.
I found they had run hot.

It is likly just surface. If it is one or two teeth it is easy to do by hand, but if it is a hole chain I grind it first, then file.

To get this harder surface of it is not easy, but a stroke with another filr might crack it enough to get correct cutting again.
Vibration doing this kills/dulls files so try to make sure file doesn't vibrate, instead cut as it should.