Air coming from Makita oil filler cap
Brand new makita Mac 2400. Filled with oil, ran for recommended 20 minutes with drain valve open. Doesn't produce enough pressure to register on gauge. Hear air coming from oil filler cap.
(Please see the trouble shooting page on this site about compressors with air leaking from the oil filler cap. As an aside, since it's brand new, we would take it back in exchange for another. - Moderator)