Question about Square D 9013FHG14J52M1X Air Compressor Pressure Switch

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I have a air compressure with a square d 9013fhg44mix pressure switch. The problem is where the 1/4 air line goes, this valve leaks when ever the compressor is off. Once the compress is on it is off and then when the compressor turns back off air leaks out of the valve again. Is there an adjustment on this? Bought new switch and have the same problem. Is this 1/4 inch line neccesary?

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The 1/4" line is very necessary and there are no adjustments on it. When the tank reaches full the pressure switch turns off the power and opens the valve to the 1/4" line to bleed off pressure from the air pump and feed tube so the motor can turn over the next time the tank drops to the kick in pressure. Every time the pressure switch turns the motor off a small amount of air should be heard coming out of the bottom of the switch for three to five seconds and then it should stop completely. If air continues to leak out of the switch by the 1/4" line, you have a bad tank check valve. The tank check valve is the brass fitting at the other end of the 1/4" line where the feed tube from the air pump goes into the tank. It keeps air in the tank after the pressure switch turns off the motor. Easy to replace, find the one you need for your model compressor.

Posted on Mar 25, 2011

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