Yesterday I did a tear down of an old unused turbo molecular pump I’ve had laying around. Very instructive to see the insides. Here it is to begin with:
To assist disassembly, the pump has pry screws to push off the top case (Stuart’s tip):
Once you remove the outer shell you see this:
Sliding out the stators allows the removal of each pancake.
The rotor appears to be in perfect condition. It is machined from a single solid piece of metal. The stators are flimsy and largely bent out of shape.
At this point we still haven’t figured out how to remove the main rotor.