by lunchb0x » 12 Feb 2012 1:59
There is a plug follower for the old 001's that went through the back cam on the inner cylinders, if you are rekeying the cylinder you should be taking the top pins out and balancing the pin stack anyway. There is a large clip that goes around the turn snib, removing that will allow you to take the cylinder out. Also while it is apart it would be a good idea to clean out all the grease that Lockwood put in there, it was good 10 years ago but now, most the time it stops the key from working properly as the grease dries and seizes the internals. WD-40 is good for cleaning them out.