I've had one for twenty years, and the question that comes to my mind is...
Why?
Cooey's don't need to be taken apart. They work. They work forever. One hundred years from now with the occasional drop of oil added to the assembly, it will function just as well as it had since it came off the factory floor. The Cooey 39 I refinished and had professionally reblued is just as good now as it has been when built some 70 years ago, and the guy didn't -touch- the bolt....