Plungers stuck on ISX 12 CM2250

[Waterloo]

(10-07-2020 )RMKC MIKE Wrote:  By whole thing, are you referring to whole pump or head? If you mean head, Cummins doesn't have a head for the pump that came on this truck.

I know nothing about the X12, but if like the CM-2250, cummins updated the pump from I believe three cylinders to two, or vice versa. Odds are, you need an entire new pump. I would register the motor on quickserve, you will need your engine serial number (EIN), register it and see what Cummins says in the manual and parts section, you will see everything the dealer sees. https://quickserve.cummins.com/info/index.html