Stanadyne Injection Pump Parts Diagram

I watched a guy last Tuesday spend four hours trying to figure out why his Deere 4045 wouldn't prime after he "freshened up" the pump. He was covered in diesel, his knuckles were bleeding, and he was about ten minutes away from throwing a heavy wrench through his windshield. He had a printed Stanadyne Injection Pump Parts Diagram sitting on his workbench, but he was looking at it like a map written in a language he didn't speak. He’d replaced the delivery valve but missed the tiny copper washer that sits beneath it. That $2.00 part, or rather the absence of it, meant his pump could never build the pressure required to pop the injectors. He didn't just