[Retro]

There should be a kit available for that pump, did you check all the fittings for the hoses? Mine has o-rings on a couple and jic on the others. If you need to rebuild the pump and dont want to loose much oil I would recommend finding the right plugs and caps for the hoses and fittings and quickly put them on when you remove them, you will loose some.
Take the pump off to rebuild it there will be more than one gasket to change and also a seal for the input shaft.
Hope this helps