In the next few days I plan to put new oil in my 1402 and test it again.
Now that it seems to be reliable I want to make sure it has clean oil to be on the safe side; ie just in case tiny particles that may be left that could clog things up. At this point its worth it. Assuming it stays OK ; I have no plans to take it apart unless I really have to. However the exploded view could come in handy some day; the data sheet might be handy for checking its performance of for diagnosis.
When you get the chance to fire up your 1402; hope things go smoothly for you. I could find very little information on the Web regarding details on repairing these pumps; the best I could find is the link Sam's FAQ ; at least he gave me some tips that got me through it all; having much patience was also helpful