unloader valve failure (Nope!)

by steve
(no. california)

I'm getting a constant hissing of air at the unloader valve site and the compressor is kicking on due to the air pressure loss. Is that due to failure of the unloader valve or some other cause?


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Bill says...

Hello Steve. Have a look at the page on CHECK VALVES linked from the site map.

Your symptoms are those of a leaking check valve, not the unloader valve.

Cheers,

Bill

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Jan 24, 2013
Speedaire 5f237G
by: jumbicat

Hello, I was able to find a kit for the pump and it’s pumping and not leaking air through the intake anymore. I have the unit connected to a power strip rated at 15amp 120VAC. Once the motor starts with zero pressure, it will run till it hits 135lbs. The switch kicks the motor back on around 100lbs. With any air in the tank (tested 25-100lbs) the motor trips the 15 amp breaker. Would a start capacitor help with the motor under a loaded tank? I have a 25uf 660VAC capacitor (What I think is a run cap) that reads good on a capacitance meter and stores a charge ok. Obviously I need to by-pass the power strip to see if the problem follows but was wondering if a start cap would help and would it do more harm than good.

Thanks in advance for any thoughts,

Mark
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Get rid of the power strip. That's likely the problem, Mark.

Either plug the compressor directly into a wall outlet with clean power (and preferably a 20 amp breaker) or spend the big bucks necessary to get a short extension cord with a 10 gauge wire minimum.

Bill


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Speedairde Motor hums only

I LIVE BY THE OCEAN AND HA VE NOT USED IT FOR A FEW MONTHS THE MOTOR HUMS ANDD EXTENSION CORD. HEATED UP AFTER A BIT SO TURNED IT OFF QUICKLY? ?

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Bill says....

The humming noise could be the sign of an electrical fault, or it could be that the extension cord is too small to supply the air compressors needs. If you were using the extension cord before, then I suspect you've done damage to your motor by chronically under powering in, and now that the motor is feeling a bit crotchety after being left alone for so long, it's putting up resistance to starting.

Lose the extension cord first.

Dump all air from the tank next, then close the drain valve.

Try again to get it going.

If it doesn't go, I suspect a start capacitor problem.

Cheers, and I sure wish I lived by the ocean!

Bill

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