Be very,very careful that the banjo union retaining bolt does not go too far into the body of the pump or it will block off one of the oilways ! Have a close look into the threaded hole, and you should be able to see the oilway that I am going on about. Carefully measure how much thread you have got to go into the body of the pump when the banjo union and the two red fibre washers are in place, and compare that with the position of the oilway in the hole. You will find that no more than about a quarter of an inch of thread is needed.
Brian
