To fjh :
It's not impossible to rebuilt the pump , but in Europe, I can't find someone who can rebuild it.
They are not interested in it. I think they can't find the parts for that.
In Europe, we have some big problem to find some good mechanics. The young ones are habit to change the part but they don't know to rebuild.
It's the rule of consumption society !
To Brutus998 ,
I have some Cummins motors in my garage. I'll look if one of them has the P7100 pump and perhaps we can make trade.
If I don't have it , perhaps you can sell me one that's on your shelf, no ?