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problem with Campbell-Hausfeld air compressor


peter_x's Avatar
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04-21-08, 05:27 PM   #1  
problem with Campbell-Hausfeld air compressor

Hi

I have a Campbell-Hausfeld Medallion series compressor, 5hp with a 27 gallon tank.

The problem is that the cut-in pressure is too low. It won't cut in until it goes down to 60 or so. If it is a little above that and I turn it on, the motor spools for a second, then it seems to detect that there is too much pressure, and dies.

When it does cut in, it charges fine up to 125. The problem only started after I took it out of winter storage. The last job it did was blowing out my sprinklers end of last year.

Anyone?


Last edited by peter_x; 04-21-08 at 05:39 PM. Reason: re-written because of wrong info.
 
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04-21-08, 10:38 PM   #2  
I don't have a manual for that unit, but generally there is a pressure switch that controls the cut in and out that can be adjusted. This is usually contained in a small plastic box right where the power cord connects to the unit. Without knowing which control on it, I can't say what adjustment to make, but it is usually pretty obvious upon observation.


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04-22-08, 04:28 AM   #3  
Ya, there are two types of pressure controls.
One that has a range and cut-in setting where you can adjust the spread.
The other only has a range adjustment and the differential is fixed.

You will find two adjustment screws or nuts on a control you can fully adjust.
Some controls have an arrow and a + or - next to the screw.


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04-22-08, 09:47 AM   #4  
Ok, I took off the plastic box and found this:



I don't really see any adjustment screw unless it is that Torx in the middle. Maybe I need to disassemble it more. I tried looking at the CH website but the manuals aren't very helpful:

http://www.chpower.com/webapp/wcs/st...ndModel=vt6291



Thanks.


Last edited by peter_x; 04-22-08 at 11:38 AM.
 
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04-22-08, 03:09 PM   #5  
In your picture the protrusion on the right hand side that is immediately above a spring looks like one of the pressure adjustments but I can't see if there is a way of turning it.
If there is only one adjustable screw then you can not set the differential.
It is fixed in many controls.

Also if the compressor tries start and the motor can't drive the pump the pressure release likely is not working.

You may have to replace this control.
If you do see if you can find one with an adjustable differential.

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