Here's a link to Mermaid Northeast (USA) site, with a servicing schedule. Says it's for Lehman, but basically the same thing. On second thoughts I'll probably get shot for saying that on a P22 thread!
My question is, are you all doing the 50hr oil change for the injector pump! This caught me totally by surprise, have talked to the engineers on here and they've never come across this either, how essential is it? It's no hassle to do it, but I haven't been doing it as I didn't know about it, and I guess the last owner probably didn't either! I know a couple of people who have the dover engine in tractors and they didn't know about it either!