Question about Campbell Hausfeld 8GAL Air Compressor
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Posted on Jan 02, 2017
if you have a air nozzle I would plug that in and see if you can get air out of that if no then you may have to adjust the hose/line pressure or you may have something inside that isn't allowing the air to come out of the tank in that case drain the tank and use either a small rod or peice of wire to poke through the outlet and clear it
Posted on Oct 02, 2008
Sounds like the cutoff valve is failing to cut power off to the compressor drive motor, while it activates the unloader.--- I'd consider looking closely at the contacts, or replacing the cutoff.
Posted on Nov 24, 2009
If you are leaking air at the unloader valve, even after the pump shuts off, your problem is the check valve. It's on the tank at the other end of the unloader tube, where the tube from the pump goes into the tank. I can't find a Campbell Hausfeld model #WL504100AJ so I can't tell you which check valve you need. The closest model numbers to yours are WL504311 and WL504312, and both of these use check valve #CV308300AJ.
Posted on Jan 03, 2011
SOURCE: I have a Craftsman compressor
you must have wired the new pressure switch incorrectly .when the pressure switch opens it will release the head pressure so your compressor must be running with the pressure switch contacts open should be 4 connections 2 marked motor which is from your compressor and 2 marked line which is your power coming in
Posted on Jun 15, 2011
SOURCE: I have a vt631401aj campbell
John: I had a similar problem with a brand new CH-made compressor. The problem was not with the unloader valve, but with the check valve located where the air from the pump enters the tank. The check valve was not seating correctly due to brass filings from manufacture. The defective check valve was allowing air to escape back the wrong way from the tank to the pressure switch and through the unloader valve. This backflow from the tank would start to happen when the pump stopped after reaching high pressure. The back flow would continue until the pump restarted at the low pressure point. This cycling would continue as you described. Once I cleaned the check valve, everything (including the unloader valve) started working correctly. I hope this helps. And remember, don't work on these when they are under pressure and always wear safety glasses.
Posted on Sep 22, 2011
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