I have a 4 Gal. Side stack oil free compressor, this weekend the compressor kept tripping the fuse box. So I investigated the machine and to my supprise I found that the piston was full of saw dust and paint overspay! Now here is the kicker, the air filter was installed fine, though overspray in the air was able to make it through the paper filter the saw dust did not enter this way. The piston is wide open on the lower end, a fan sucks unfiltered air and blows it up into the piston. It builds up on the cylinder walls and eats up the rubber piston ring. I cleaned everything out and now need a new ring, until then I am looking into a more well made compressor. Also I am looking to get the air in my shop cleaned up, I checked my miter saw motor and other motors and noticed dust build-up.
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