Rigid Compressor blows breaker

by Mark Brown
(Denison, Texas)

I purchased a Rigid compressor at an auction. The unit does not appear to have been used at all. FLA is 14.5 AMPS. I have the unit on a 20 AMP dedicated circuit.


This is a dual capacitor motor.

The compressor comes on and runs for about 10 seconds then trips the breaker. I disconnected the air line from the compressor head to eliminate the check valve and unloader valve. The unit spins freely by hand. The unit still trips the breaker. Do I have a bad 'run capacitor'? Any idea what may be wrong?

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Bill says...

If it runs for 10 seconds and then trips the breaker, and it is a motor related issue rather than a mechanical one, then I'm going to guess that the motor problem is related to the windings when it moves from start to run, and I'm guessing a short of some kind.

Cheers,

Bill

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Nov 11, 2011
Progress, but still inoperable.
by: Anonymous

Thanks for the input.

Took motor to repair shop. Someone has put a start capacitor on the run side of the windings. He installed a run capactior, started it and the amps when from about 26 to 6.5.

Took home, put the motor on and it started right up and shut off at 150. Bled off some air and the motor would not restart. Determined had back pressure on cyclinder. Took check valve apart and cleaned even though not very dirty.

Got to looking for bleader valve as described in the manual and it was not there. Someone had changed the pressure switch out eliminating the required bleader valve.

Now I have to locate a new pressure switch with bleader valve.

The unit is a RIDGID OF45150.

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By bleeder valve I take it you mean the UNLOADER VALVE.


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rigid wheel barrel compressor popping breakers

by chris
(cincinnati)

i plugged it in on my job site and the breaker pop after a few seconds i then plugged it into a generator it ran till it built up about 50 psi and the generator blew a breaker any ideas what is going on? rigid wheel barrel style compressor 110 volt
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The breaker pops as the compressor is pulling too many amps for the circuit, typically.

Reasons vary.

If on a job site, how long is the extension cord? Better you don't use one, but if you must, it has to be a heavy gauge to help prevent power loss to the compressor motor.

Other reasons could be a fully plugged intake filter, a start / run capacitor that's failing, it's too cold when the compressor tries to start, all the same reasons that are covered in the posts on this page.

B.

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Mar 01, 2014
rigid compressor
by: Anonymous

No extension cord being used plugged directly into wall

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ridgid gas powered wheelbarrow 5.5hp 9 gal air compressor bought at home depot...

starts up runs fine when i disconnect pump exuast from the unloader valve when hooked up runs to up to 100psi starts to shake alot then when it reaches maxpsi at 150 it dies also the air output gauge reads opsi no pressure but tank gauge says its maxed at 150psi

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Bill says....

A number of issues here on your Ridgid wheelbarrow type air compressor.

I took a look at the manual for model GP90135, which is the same as or similar to yours. Interesting to see that this round of Ridgid air compressors is made by Campbell Hausfeld.

As far as the shaking goes, make sure all mounts are secure, and watch (carefully) the action of the drive belt as the air pressure reaches the "shaking point". It sounds to me like it might be belt misalignment causing part of this.

When cut out pressure is reached, the unloader is supposed to allow the gas motor to idle until the tank pressure drops to cut in. If the motor dies on cut out pressure, throttle adjustment may be out of whack.

If your air tank gauge shows 150 PSI and the regulator gauge shows zero, either the regulator gauge is broken, or you have turned down the pressure setting to the point where the regulator, which is also an on/off valve on some models, is turned off. It can't read pressure as none is getting to the gauge.

Cheers,

Bill




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ridgid compressor Pressure is not releasing from the piston.

by Hawk

Pressure is not releasing from the piston.

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Bill says...

Hawk, are you saying that when the air compressor shuts off at the normal cut out pressure level, that the UNLOADER VALVE doesn't dump the over-piston air?

That being the case, check out the unloader valve to see why.

If that isn't the issue, please comment here with more details.

Cheers,

Bill




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