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Rob, I'm really sorry. I guess I didn't look closely enough at your picture to see that you had already taken out the inner cylinder. Like Jim said, you can tap out the shaft. I'd go from the delievery side out tward the engine side. The small puck in the middle has to float on the shaft...

That shaft has a very high machining tolerance to the hole it slides into. If you can't move yours then you need to definitly take it out and clean inside the unit further. The shaft should have a perfect gliding feeling with a light coating of diesel, just smooth as silk. To remove the pump...

Those pieces were designed to break, sort of like a safety fuse so the more intricate parts don't become damaged. Rob, you may want to check if that quill shaft sticking out in your picture can spin freely and pump in and out. You can lube it and all the pump parts with diesel fuel. You may...

Hi Rob, I ground down the mating edges (where its broken) to form an angle (V notch) to accept weld material. Don't mess with the broken faces and grind too deep because the faces will probably fit back together like broken cookie pieces will inter lock. I used a mig welder on a low to medium...

Its already screwed up so what the heck, take it off and open up the IP. That was my mentality. Its not so scary if you look up and read TM 5-6115-584-34, which is available here in the TM menu under generators. There is a fuel return line that comes off the IP and dumps back into the tank...

I forgot to mention, I carefully welded mine back together and ground it to shape. (As well as cleaned up the internal parts of the IP.)

I had the very same problem. Upon cranking the engine, fuel would not get past the injection pump and to the injectors. The problem was this broken piece within the injector pump. Search here on SS and you will find threads that will guide you on how to disassemble and repair the problem...