Air coming from Makita oil filler cap

by Jerry
(Sterling, colorado)

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)

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Sep 26, 2016
Air from Makita oil fill cap
by: Bill

A new compressor with air leaking from the oil filler cap, my, that's not good.

I would expect that the piston seal(s) have failed, are installed incorrectly, missing... who knows until you pull the pump apart.

Since it's a brand new Makita compressor that is failing, we would take it back in exchange for another. This one may be a lemon.

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