That's probably something JD sells as an assembly (the whole pump), if it's available.
IMO, your best bet would be to research the engine make/model (as in, who manufacturered it for JD), and then look through their parts diagrams/service manuals for the engine. And if that does 't work, look for any part numbers/brands on the pump itself, to indicate who makes it and if there are any parts diagrams/service manuals from the original pump manufacturer.
Incidentally, why were you removing that part (it could be either a nut or a bolt)? From what little I know about them (diesel injector pumps), you need to know what your are doing, as some of them have specific setups, where even loosening the wrong bolt will throw the pump off it's calibration, and need fairly specialized tools and/or parts to get it back into calibration, and if you can't do it yourself, the people who have the tools and knowledge tend to want a fair amount of money to do it for you...
IMO, your best bet would be to research the engine make/model (as in, who manufacturered it for JD), and then look through their parts diagrams/service manuals for the engine. And if that does 't work, look for any part numbers/brands on the pump itself, to indicate who makes it and if there are any parts diagrams/service manuals from the original pump manufacturer.
Incidentally, why were you removing that part (it could be either a nut or a bolt)? From what little I know about them (diesel injector pumps), you need to know what your are doing, as some of them have specific setups, where even loosening the wrong bolt will throw the pump off it's calibration, and need fairly specialized tools and/or parts to get it back into calibration, and if you can't do it yourself, the people who have the tools and knowledge tend to want a fair amount of money to do it for you...
