Replace the transfer fuel pump.

[pete389]

I have seen two cm2250s go to shop on the hook for shattered plungers.they came through this and they both have 200000 to 250000 on them sence. It was a time consuming process. Cummins has a procedure for cleaning and replacing parts that take most of the contamination. Cummins made them try this before replacing engine under warranty. Not saying these engines are good as new but still run very good oil pressure. Just throwing it out there food for thought.