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Issue with compressor.

Chaznsc

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Apr 9, 2013
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I have a craftsman 5hp portable compressor. Today it developed a noticible hole at the base of the air inlet to the tank. Can this piece be changed?
 

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Nexussian

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If you are concerned about the round hole in the fitting, pictured on the right, it appears to be manufactured, can you see if it is threaded?

I would suspect it to be some sort of last chance relief, as in, if the pressure switch stuck in the on position and the pump kept running with the tank above it's rated pressure, something would blow out of that hole and keep the tank from relieving itself like a bomb.

If that's not it, try dismantling that.

If the tank or the line are flimsy enough to be damaged from disassembly, while exercising s modicum of care, then they shouldn't be pressurized in the first place (thinned out by corrosion perhaps?).
 
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Chaznsc

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Based on the above, it appears this lets the air trapped in the compressor to evacuate once the pressure switch shuts off the motor. Problem is it lets all the air from the tank.
 

rustrunner

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Apr 14, 2013
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bushnell,fl and the backroads of N.H. & Vt.
I had a problem with mine years ago and if my memory serves me right, I think (could be wrong) that there is a plastic ball with spring in there. like I said it's been a while. i'd tear it apart and find out. can't hurt, it if it's not working right.
 

redmondjp

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Nov 25, 2014
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Redmond, WA
That fitting shown is a combination tank check valve and compressor unloader (the tiny hole). The check valve is leaking.

Yes, it can be replaced (I'd take it apart and see if it can be cleaned or fixed first, as stated above).

Control Devices makes new combination check valve/unloader units, known also as a "load genie". Here is one for sale on Amazon:

https://www.amazon.com/dp/B007IVRQZ6/?tag=atomicindus08-20
 
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Chaznsc

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Apr 9, 2013
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The check valve was sticky. I removed it and oiled / cleaned it. Works perfectly now. Thanks for the help guys.
 
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