I am mechanically inclined I'm asuming it is like a transmission valve bodie but I've never seen a breakdown of the hpop or engine itself. Where is the best place to get a manual or diagram of the pump. I know how to do almost anything with a gas engine and can do most things with my eyes closed but I'm new do the Diesel engines and want to learn as much as I can because I trust my work more than any one that is around here. Any recomendations of either links or places to buy a manual would be great. thanks