AR50146 injection pump

Late 7700 with turbo used a Bosch inline pump. Some 404 engines used JDB or DM rotary pumps. I prefer the pump builder number as some JD numbers aren't in my book.
 
This is the old style roosamaster pump like the old JD 4020 tractors used and similar to the 1971 and 1972 pumps as well these did not use a electric shutoff and were from a 128 hp non turbo motor
 
Look closely at the pump tag, DBGVC pumps fit EARLY 404 blocks with the small hole above the oil pump, later blocks used a larger hole for the CB and JDB pumps as the pump housing pilot center was larger. Pumps will not interchange. JDB pumps were also built with and without the electric shut off solenoid. The late 4020 did use electric shut off, where early models did not.
 

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