Hmm, Cummins Injector Pump Circling the Drain?

Last week Nellie's fuel injection pump started to leak from the auto advance assembly's gasket. Not a big deal but certainly a warning flag for things to come. After all, its gaskets and seals are 25 years old and have been operated for 5500 hours. It took three hours today to remove the pump—but much of that was head scratching and looking for the right-sized wrench or socket.