Air compressor keeps turning off and doesnt build pressure

by Adam Sennick
(Toms River NJ)

My buddy brought over his air compressor to help me blow out my irrigation system. We turned it on and let it build to its max 150 pressure for bout 5-10 mins. We hooked it up to the first zone and blew out some water. The one sprinkle head was aimed toward the compressor and appeared to get the compressor a little wet. The compressor turned off and actually tripped a breaker in the house. I let it sit overnite and tried it again the next day. The compressor turned on fine and built max pressure for 5-10 mins. I blew out a sprinler line. Then the compressor would not kick on and rebuild the pressure lost. I pressed a button and the compressor would turn on for bout 10 seconds, but would not build pressure and then would shut off. It would do this again and again but for less time (8 seconds, then 5 seconds, etc.) then finally it would not even start after pressing the button. Any advice would be greatly appreciated. Thanx in advance! Adam


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Bill says...

Hi Adam.

Open the tank drain and let all the air pressure in the tank out. Close the drain.

Try and start the air compressor. Any change? Please post your response as a comment here.

Cheers,

Bill

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drain nut won't close

by Cheryl
(Glen Ellyn, IL)

We drained the tank and now we cannot keep it from leaking air from the drain once we try to retighten the nut. What are we doing wrong?

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Bill says...

Sometimes the tank drains turn in an opposite direction than you think, to open and close them. Try turning your drain handle the other way to see if that makes any difference. Turn to completion, whether it's opening or closing. One way or the other should work... unless....

You don't indicate how much air is coming out. If it's been a long time since the compressor was drained, it is possible that there is some debris in the valve that is preventing it from shutting completely.

Cheers,

Bill

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Iron Horse 80 gallon 5hp compressor is squealing

by Renford
(Alliston Ontario)

I have an Iron Horse 80 gallon 5hp compressor (belt driven). I've had it for about a month now and recently I had to change the belt. I think it was on too tight from the factory, because it was only running for 60-70 hours before the belt stopped turning the pump wheel (it was just slipping around the pump wheel). So I changed the oil too, I used non detergent compressor oil and it was working fine for the last few days, but today when I fired it up it started making this squealing noise. I checked the belt it seems fine I have about an inch of deflection in it (I know it is important not have the belt not to tight and not to loose). I let it run a little longer and the squealing stopped but it still sounded a little weird, making a small squeaking sound. I was wondering if it might be a problem with the bearings in the pump or something else. Any help would be great.

Thanks, Renford

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Bill says...

Renford, a too loose belt might squeal on the sheaves, or, if the sheave that's being driven is binding on something, the belt might squeal as it moves through the groove on the sheave without the sheave turning fast enough to keep up.

I can't hear the noise, so I don't know if it is the belt that is making the noise or not.

Try getting a spray can of belt dressing and give the belt a shot of that to see if... a) the squealing stops b) you can isolate the source of the sound.

You also might want to check your manual for the belt tightness guide. To me an inch of deflection seems to be a bit loose.

Cheers,

Bill

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eurasia - compressor blowing all the air away

by robbie
(vredenburg)

bill regarding my problem with the compressor blowing all the air away..i have now established that if you unplug the mains in other words cut off the electricity the compressor holds the air like it should.but as soon as u restore the electricty supply the air starts bleeding away.can this be a pessure swith failiure?thanks robbie

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Bill says...

Robbie, to me this does not sound like a pressure switch issue, though a diaphragm failure in the switch might be a cause.

Do you have a solenoid operated dump valve in your circuit, and when the power is gone, the valve shifts to dump the air.

Wish I could see the circuit to be sure. Look for any electrical air valves and over-ride them to see if the air stops leaking.

Cheers,

Bill

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