Air Compressor Issue |
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wideone
Senior Member Joined: 05-August-2011 Location: Bristol,TN Status: Offline Points: 310 |
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Posted: 26-July-2012 at 2:38AM |
I have a IR 80 gal 7.5 max hp compressor. It kicked on yesterday and filled up like always, then started what sounded like shot gun shots. After I cut it off, you could see the tank pegged at 150 psi. My thoughts are that the pressure blow off is bad or going bad. The unit is mounted in the corner and I haven't tried to get into it yet. It did fine for about 4 more cycles, then started doing it again about every 10 seconds till I cut it off. Anyone have any thoughts? I hope this is as simple as replacing the pressure blow off. Thanks Randy |
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ilyes
Senior Member Joined: 09-January-2010 Location: Philadelphia PA Status: Offline Points: 3782 |
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What is your regular tank pressure?
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wideone
Senior Member Joined: 05-August-2011 Location: Bristol,TN Status: Offline Points: 310 |
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As far as I know Ilyes, it has always been around 150 which is straight up on the guage. Seems like it was always normally there when I shut the compressor off. I did have an electrical surge in the garage during the last few storms that killed the tv there. The comressor is on a breaker, then a fused shut off box so I think I am safe from the surge as nothing tripped. Thanks |
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Psquare75
Admin Group Member of the Stroker Club Joined: 26-November-2005 Location: United States Status: Offline Points: 4591 |
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My pressure blow off got stuck open once. That was fun. Worth looking at.
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Paul
77 XR7 460/C6/3.00:1 *SOLD* 78 XR7 523/C6/3.5:1 79 F100 460/TKO500/3.25:1 'I also have some left over potatoes-I understand you can generate electricity from them'- Foote500 |
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Rockatansky
Senior Member Joined: 30-July-2010 Location: On The Road Status: Offline Points: 6059 |
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or it could be the high pressure cut off switch is allowing it to run up over the blow-off limit and the high pressure relief valve was operating properly
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72 GT Ute
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wideone
Senior Member Joined: 05-August-2011 Location: Bristol,TN Status: Offline Points: 310 |
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This makes sense as it "fixes" itself after being turned off. I'm going to try and use it tonight to finish the repair to the side of my car. Very little painting/clear coat and I'll be done. Thanks |
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Robbdtme
Senior Member Joined: 06-June-2012 Location: Central WI Status: Offline Points: 765 |
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I go with the electrical pressure relay switch too as you mentioned having some electrical surges
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wideone
Senior Member Joined: 05-August-2011 Location: Bristol,TN Status: Offline Points: 310 |
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Well, it is supposed to be 135 psi max. I cycled it four times tonight, first 3 everything was fine. Fourth time it ran away to 150, hit the pop off and wouldn't shut off. Going to see about getting a replacement. I think it is heat related. Thanks |
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ilyes
Senior Member Joined: 09-January-2010 Location: Philadelphia PA Status: Offline Points: 3782 |
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it might be, as air expends when hot, and it could simply expand in the tank
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wideone
Senior Member Joined: 05-August-2011 Location: Bristol,TN Status: Offline Points: 310 |
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Just to put this to bed, it was the pressure switch. Easy fix, but i still don't understand why it would work correctly for as long as a week, the run away to the point you couldn't shut it off using the switch, had to trip the breaker to kill it. oh well. |
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