WL604006AJ - Runs continuously but does not build pressure?

by Mike
(Webster, NY)

campbell hausfeld WL604006AJ air compressor

campbell hausfeld WL604006AJ air compressor

I have a Campbell Hausfeld WL604006AJ 4HP, 13 gal, 125 PSI max air compressor.


I pulled the compressor over onto its side on my concrete garage floor by not realizing I was at the end of the air hose extension.

Now the compressor runs continuously without building pressure above 100 psi (what was in the tank when I pulled it over) even when I flip the pressure switch OFF/AUTO lever to OFF.

I unplugged the cord from the outlet and with the 4 wires disconnected from the switch there is continuity between the terminals for the line black and motor black wires with the OFF/AUTO lever in both positions.

Will replacing the pressure switch correct both the OFF/AUTO problem and the lack of pressure build or do I have an additional problem?
Thanks
_____________________
Mike, at what pressure did your Campbell Hausfeld air compressor shut off when it was working properly?

If that pressure was, say, 120 PSI, and your air compressor tank pressure never gets to that 120 PSI mark, then your pressure switch won't trip to off, and power will continue to flow through the switch to the motor circuit.

However, by flipping the pressure switch lever to off, that should manually open the points, and power should not flow to the motor circuit, even if the pressure in the tank is below cut out.

So, I think you have two problems. You may have damaged the pressure switch (maybe the lever?) when the compressor flipped, and you may have a pump problem with it's inability to pump past a certain level.

See the sitemap page under troubleshooting for links to pages about that.

Cheers,

Bill


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WL604006AJ - Runs continuously but does not build pressure - follow up

by Mike
(Webster, NY)

Bill,
Thanks for your prompt answer to my question.
I am pretty sure that the compressor shut off at 125 psi. The switch is marked 95/125.
The switch lever does not move the contact bracket so I imagine something went awry when I pulled over the compressor.
I drained the compressor tank and discovered that the tank pressure gauge screwed into the pressure switch continued to read 100 psi with the tank empty. I unscrewed the valve and it did not return to 0 as did the regulator pressure gauge. I switched gauge positions and let the compressor run until the tank pressure indicated 125 so I am confident that the compressor itself is fine.
I will order a new pressure switch and gauge and let you know how I make out.
Thank you very much,
Mike

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campbell hausfeld WL611106AJ will run for about 5 minutes then shut off

My unit will run for about 5 minutes then shut off, never reaching 125 PSI for about an hour. It takes 15 - 30 minutes for it to come back on. Is there anything I can do.
__________________
What this sounds like is that the motor is shutting down on thermal overload.

This can happen when the compressor motor runs much longer than normal, trying to get the pressure in the tank up to the normal cut out pressure setting but, since your compressor has issues with that, doesn't get there fast enough before the motor overheats and shuts down.

Then, the motor cools, the thermal overload resets, the motor starts, and the cycle repeats.

You need to see the troubleshooting section on the sitemap page, and read the page about why air compressors run and don't build pressure, or build it very slowly.

Cheers,

Bill

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Working on valve assembly on model DP4615

by Fred
(Byers, Co)

I have a DP4615 compressor that started blowing air out the inlet valve on one of the three cylinders.

My manual says this is a bad valve assm.

I have never had a valve assm apart before. Hoe do I do this? Anything special I need to know before I tear into it?

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