leave the engine in the skid loader, drain and pull the rad and fan..you'll need a DB pump gear puller, or make your own..leave the pump drive gear right where it is,this is basically a small plate the has two bolts that hold the drive gear and a center forcing bolt to push the tapered shaft off the drive gear off the DB inj pump shaft..pull the nozzles(injectors) and send them in with the pump to get cleaned/checked..that way when you get the pump back its a system ready to go..Area Diesel looks like a full service diesel pump shop, I'd try em if I was in the midwest..hell call them to discuss it all