Question about Dewalt D55153 1.1 HP Continuous 4 Gallon Electric Hand Carry Compressor

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My DeWalt D55153 oil-lubed compressor won't get up to pressure, and runs continually trying to.

My DeWalt D55153 oil-lubed compressor won't get up to pressure. At first, it would only go up to about 100 psi and then keep running but not increase tank pressure; then it was 70, and now it's getting stuck at about 60. I've adjusted the pressure cut-offs a few times so I could keep using it, but at this point it's not giving out enough pressure. I don't use this compressor often, and it usually rides in the back of the van. Over the years I've changed the oil every year, since I don't get very many hours on it. I've noticed that the oil was dirty when I changed it last year, and this year it looked like it may have been metal in the oil. It's been making a bit of a pinging/knocking noise when it runs. Am I dealing with a pressure switch issue, or is this a motor issue? Is infrequent use and constant transportation a problem for this type of compressor?

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Posted on Jan 02, 2017

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SOURCE: dewalt air compressor keeps running until pressure

The regulator switch/unloader is bad or out of adjustment. Perhaps though the gauge is faulty. 200 psi in a 120psi compressor is dangerous, don't run it until it is fixed!

Posted on Dec 16, 2010

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SOURCE: Dewalt D55168 air compressor runs until 95 psi and

If you have no leaks the first thing I'd check is the ring and cylinder for wear. The cylinder wear is usually pretty obvious, but if you can see light around the piston ring it's bad. The replacement part number is N038785. Also check to make sure no valves on the valve plate part number A09819 are broken or bent.

Posted on Dec 16, 2011

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