John , the swelling traps the internal mechanism as well as preventing the cylinder from sliding in the housing. Note the lock cylinder plunger in the third picture. It is trapped in the die casting. The groove you mention is between a steel sleeve and the casting. The lock cylinder is squeezed by the swelling and probably can't be removed without cutting open the casting. Yes the parts were originally plated when the assembly was new. I have talked to one or two machinist about reproducing the casting and from their comments; yes I feel it could be accomplished. Part of the problem is I don't know exactly what the guts of the cylinder look like. There must be some sort of cam mechanism that withdraws the lock cylinder plunger allowing the cylinder to "pop out" that is attached to the lock cylinder itself. At the minute, it looks like the cylinder will have to be machined open to figure out what it looks like inside; however, I am holding off on this option until I know more about what I am facing. I was hoping someone on this forum had delt with this issue before.
Edited by HarryJ (06/08/08 09:45 AM)