47065 Compressor very little air pressure

by bill
(peoria il.)

47065 Compressor

47065 Compressor

Air goes into tank no pressure reads on either gauge (pressure switch or pressure regulator) very little air comes out of hose.


If I take gauge off pressure switch air blows out under pressure or if I take of pressure regulator same.

Replaced pressure switch already put gauges on different compressor and showed pressure put pressure regulator from another compressor on no change.

This compressor is only little over year old had problem for last two months

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Sep 23, 2017
47065 Compressor pressure
by: Bill

When you say "Air goes into tank no pressure reads on either gauge", if there is no reading on either gauge, how do you know, please? I know you say air comes out when you remove a gauge, but it only take a pound or two of PSI to make air flow.

When this happen "If I take gauge off pressure switch air blows out under pressure or if I take of pressure regulator same." how long does the air flow out? A short burst, or does it flow out for some time?

You checked that the gauges work, if the pump was truly pumping air the tank gauge would register that in a very short time after the pump started if air was being generated, so the problem has to be with pressure generation, and that's pointing back to the pump.

With care, compressor off and tank empty, remove the line from where it enters the tank. Start the compressor. Can you stop the flow of air from the pump with a gloved finger?

While the troubleshooting pages on this site about compressors that run but don't build pressure will point to a few more checks, I'm pretty sure you're going to find the pump has a valve, gasket or piston ring problem, and that typically means a tear down and parts replacement.

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