Devilbiss Compressor blows gunk out of drain

I have a Devilbiss 60 gal. air compressor that is blowing water and a tannish, grey gunk that has the consistancy of snot when I drain the tank. Any idea of what it could be and how to fix it?


Thanks,
Chris

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Bill says...

Hi Chris. My, you have a way with words! :-)

Have a read of the pages that link from the navigation bar COMPRESSOR WATER. All will be explained.

Sounds to me like you may not be draining your compressor tank often enough, too.

Cheers,

Bill

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Devilbiss 70's era 3HP 30 gal 220v sears compressor

by Doug
(Wash DC)

I need to know what model number it is. I know its a Devilbiss model. The pully/belt housing is a 2 piece plastic affair and the pump uses oil.

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devilbiss 5 hp Air compressor problems ~ won't stay running

by Tim
(W.Mifflin)

I have a devilbiss 5 hp 60 gal single stage 15 amp compressor that I can't get to stay running. It runs fine until approx 35 psi then it starts to shut down,the motor will start bog down and then go on and then off,before I changed the power source, it would throw a breaker.

I recently had it checked out because I could not get it to run at all, the shop checked it out and did some minor adjustments.

I called the shop and they told me that they had it up to 90 psi. I thought I was underpowered, I had 20 amp, 220 v power, so I changed to 30 amp 10/2 wire from 12/2. It is doing the same thing. I am at a total loss.

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Bill says...

Hello Tim. I wonder what it is that the shop did?

If your compressor starts at the cut in pressure, and then isn't able to generate pressure past a certain point, that usually points to an internal leak in a gasket or intake valve issues.

That yours reaches that point and bogs down suggests that the load is increasing (this is normal as air is compressed into the tank) but that load is exceeding the capability of the compressor to overcome it, and the motor bogs and the breaker pops.

The breaker pops because your compressor is pulling more amps than the circuit can deliver.

It could be your motor is failing, or that there is a mechanical issue that increases load back to the motor as the pressure in the tank builds.

Good luck.

Bill

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Devilbiss IRL5020 won't start automatically after pressure drops

by Mike
(Denver, Colorado)

If the tank is empty I start the compressor and it fills to approx 125 psi and turns off, I have a defective Valve Check (A19715) that causes a leak at the unloader pressure relief valve (KK-4315) as the pressure drops below 100psi the pump motor kicks back on but it just wont engage/turn and lights flicker and fuse trips.

Is this happening because of the faulty Valve Check (A19715)?

I am waiting on that part to arrive.

Thanks for any input you might have.

Mike
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Mike, I don't think the issue is check valve related. It could be the unloader isn't doing what it is supposed to when the tank pressure reaches cut out.

Dump all the air, start it, and monitor to be sure if the unloader valve functions, will you?

And, you could re & re the check valve, clean it thoroughly, and that might stop the leak.

Cheers,

Bill

Comments for Devilbiss IRL5020 won't start automatically after pressure drops

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Apr 13, 2012
RE
by: Mike

I believe it is working fine and will continue to leak air until the tank is dry because there is no functioning check valve stopping air from exiting back out of the tank, therefor... there is always air in the outlet tube and cylinder head which cant be drained off because the check valve is malfunctioning.hence the pressure creates a difficult restart environment due to the pressure in the pump.
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If the unloader is working, the air bleeding from the leaking check valve will exit at the unloader valve, and would not necessarily, unless it's really a huge leak, not be a factor in the restart. But, always good to fix what is broken. :-)

Cheers,

B.



Apr 11, 2012
RE
by: Anonymous

I took the check valve out and it doesn't even have the spring in it.....I will start there. the restart that wont turn compressor motor and trips fuse is similar to others I have read on here....any resolution on that?
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Mike, again, I don't think the start issue is check valve related. It could be the unloader isn't doing what it is supposed to when the tank pressure reaches cut out.

Dump all the air, start it, and monitor to be sure if the unloader valve functions, will you?

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