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Tool Talk Discussion Forum

Re: Air compressor trouble

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Author  [Modern View]
XRogerX

03-28-2013 14:57:53
99.254.4.97



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If I knew what pump it was I could give you a better diagnosis, but usually, the pressure relief valve on the pump itself is to relieve excess pressure between stages. If it pops, you have HP valve problems. Some people will swap it out for a full pressure valve (200psi or so) to mask the symptoms of failed valves, but all you are doing is forcing the 1st stage to do all the work, the second stage is just along for the ride. Do you actually hear pressure bleeding off after it stops? I have seen blow off lines completely filled with carbon on worn machines using car oil as the lubricant. The fact that it runs when you pull the valve is a sign that pressure is being trapped somewhere, along with the fact that it will start when it bleeds down to 50psi. You might put a pipe nipple and a pressure gauge in there to see what pressure you are getting. A picture would help greatly.

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