Maximum output pressure is significantly lower than max. tank pressure.

by Michael
(Hinchinbrooke, QC, Canada)

I just received a second-hand Campbell-Hausfeld WL650102AV air compressor that needs some accessories and a bit of servicing. But before I put too much money into it, there is one issue I cannot figure out.


The compressor is rated at max. 125 psi. I can get the tank to fill up to just under a 120 psi on the tank gauge (good enough for me) but I cannot reach more than 60 psi on the regulator gauge, no matter how much I turn the dial to max.

I can turn it down from 60-0 psi, but not past 60.

I switched the gauges around, thinking that the output gauge is broken, but I get the same result.

I have taken the Regulator apart to see if anything was obviously broken. I ended up just cleaning it and putting it back together. There seems to be no air leaks, anywhere.

Do I have a malfunctioning regulator? Is there some dirt somewhere between the tank and regulator or is there something else wrong?

I am wondering if you could help?

Thank you in advance for your troubles!

Michael

Comments for Maximum output pressure is significantly lower than max. tank pressure.

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Aug 29, 2016
Air regulator tear down
by: Bill

Well Michael, you have way more patience than I, when it comes to tearing down and rebuilding a compressed air regulator. Good on you for finding the source of the regulator problem.

Aug 28, 2016
To Bill
by: Michael

Bill,

Here is an update on my progress. I managed to completely disassemble the Regulator in question and discovered that is was full of metal debris (probably rust from the tank).

After cleaning and reassembling it, the reading on the regulator gauge was the same as on the tank gauge, which is great news.

Now it makes sense to invest a few Dollars to replace the broken motor bracket, which was caused by too much vibrations, due to a missing screw, and replace the worn and somewhat loose output pipe (caused by the same vibration), leading from pump to tank. Replacing that output pipe may even fix the issue with the somewhat lower tank pressure (115 psi vs. the rated 125 psi).

Thanks again for your help, Bill!

Aug 28, 2016
Re: It's actually...
by: Michael

Yes, you are right! The model number is actually WL650102AJ.

Aug 27, 2016
AV?
by: Doug in s.d.ca

I'm curious, a bit.

It's AJ, instead of AV, isn't it?

Aug 27, 2016

by: Bill

Re this: "I can get the tank to fill up to just under a 120 psi on the tank gauge (good enough for me)".

See: http://www.about-air-compressors.com/compressor-will-not-build-pressure.html

Regarding the regulator issue, given the relatively low cost of a new regulator, the fastest diagnostic is to replace the questionable one. If that works, you know it's the regulator. If not, you have a spare... and then see:

http://www.about-air-compressors.com/no-air-out-of-hose.html

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