AIR COMPRESSOR SPITTIND LID OF OIL TANK

by Rodrigo
(Volta redonda, Rio de Janeiro Brazil)

I've just bought an air compressor type piston with cylinder to stock air. Using it by first time, after some seconds, it spitted oil tank lid.

In that time, I thought I had put it wrong, because before turn it on, I checked the oil level and it was accordint to. So I decided to make the inicial procedure again. It worked well, but when it was filling the air cylinder, the lid was spitted again, but this time more violently and a bit of hot oil was flushed. The gauge was indicating 80 lbf. What could this be? The compressor is the way it came from manufacturing, in other words, I didn't put neither took away oil of tank. There's one more thing: the noise before the spitting of the lid got high and now the sound of motor is too aloud. Is this normal on the first operation of an air compressor? What it could be? Thank you for your help.

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Bill says...

Rodrigo, no, oil is not supposed to spit up and out of the vent in the oil fill port.

I'm surprised that your compressor came to you with oil in it. Most new compressors that are of the oil lubricated variety, are stocked without oil in the sump.

My guess is that you have way too much oil in the sump and, as the oil heats with the compressor operation, it expands, and blows up and out of the fill vent.

Check the correct fill level against what the manual says, the site glass indicates, or the dip stick on the fill tube cap says, and if it is too high, drain the oil out to the correct level.

Good luck.

Bill