Question about Craftsman Air Tools & Compressors

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Craftsman Air Compressor 919.156640 -- Today, when I went to set the regulator outlet pressure to 80 psi, it continued to hiss (relatively small air leak) from under the plastic regulator knob (13 on the parts diagram). When I turned the knob counter-clockwise to reduce the pressure, it had no effect - the pressure stayed at about 80 psi with a slow leak. I eventually pulled the safety valve to reduce pressure so that I could open the drain ****. My owners manual states that for the problem of a continuous air leak at the regulator knob, the cause is usually dirty or damaged regulator internal parts. Most of the parts are not available any longer. Is it worth my trying to take the regulator apart to clean the parts - or is this beyond routine DYI skills?

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You could give it a try you don't have anything to loose and you might be able to clean it and thats what it sounds like. But you can redo bolth of the regulators with new ones get rid of the plastic cover and they thread on a pipe that comes out of the air system. You could get two new gauges and a manifold body for 50 dollars at a place that sells auto paint supplys or spray equipment. If the compresser still works good its worth it you just have to do a little retro fitting these parts tend to be vary standard its your call good luck

Posted on Jan 02, 2011

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Take it apart, just watch for the springs and valve falling out. Regulators aren't complicated and if you can save $40 for ten minutes' worth of disassembly, cleaning and reassembly then you're probably ahead.

If nothing else, you get to see exactly how it works, and that's worth something too.


Posted on Jan 02, 2011

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