First thing yes you should have a little oil in your lines and if oil is just shooting out at that spot your getting to much oil from your oiler unit, you need to turn it down some, you only suppose to get one drop of oil for every 50 rounds or so ( your press is way bigger than mine so maybe a few more drops) second pull that air line off and cut a little off and push it back in, if that does not work replace the fitting. I had a fitting leaking the other day and I just cut the air line back a little and problem solved.