I have a mortise lock and I just replaced it's dead bolt cylinder. I cannot find a perfect picture of it but it looks just like this:
[url]I removed it and took it back to the locksmith who keyed it for me, and while he watched, I can insert my key and it turns every single time. I felt like an idiot.
I then went back home, reinstalled it, and inserted my key, won't turn.
I removed it again and no problem.
So it will only work when uninstalled. Once I installed it fails.
I then removed the middle screw, it works again. WHAT IS WRONG WiTH THIS???? Why is the middle screw when tightened make it difficult to turn the key?
I looked closely, and it seems when the screw is tightened, I cannot insert my key 100% into the cylinder. There may be about 0.5mm still protruding, causing the problem.
I tried NOT tightening the screw too much and it did not help. I am running out of ideas. Why would this screw make a difference anyways? Is it possessed?
MC