Dunno much about pump it all as its "new" to me, all readers can figure this out with my posts by now, but what I know is that I put a lot of "S*it" into mine and that its still going, they are strong. How would yours be gone?
Again, look at the tank strainer( mine was filtthy) the pre-filter, the filter. Those are important.
Olivier

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E300TD year 2000. RUSTY SOLD
cost a fortune to maintain on the road
but run well on WVO
Second Merc died due to corrosion ( NOT rust) How can mercedes get away with that for so long?
Third lasted a month then went away...
Fourth now... Corroded too...