Question about Campbell Hausfeld Single Stage Air Compressor. Single Stage Cast Iron Compressortwin Cylinder Vt Pump with Flywheel

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Unloader valve leaks on my compressor leaks air constant and I think that it must need replacing, does it? just old or what?

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  • Greg Bernett
    Greg Bernett May 11, 2010

    How old is your compressor?

  • Anonymous Mar 26, 2014

    My pump is an Armstrong Astro 31 about 15 years old

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THE VALVE COULD BE BAD BUT IT MORE LIKELY THE CHECK VALVE IN THE TANK ISNT CLOSING. DRAIN PRESSURE AND REMOVE CHECK VALVE FROM THE TANK AND INSPECT.

Posted on Mar 14, 2009

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I have a Dewault D55141 air compressor that runs to 150 lbs of pressure and blows the valve and releases air. I bought it new about 2 yrs ago? What needs to be done with this problem? I noticed on this...


Hello;
150 is your cutout pressure. It's the factory setting and is not a problem. But, It appears you have a pop off (safety) that is set for 125 psi, So, If you want 150 psi, the pop off needs to be adjusted. If you want 125 the the cut out switch needs the adjusting. The setting. More than likely the 125 psi pop off valve is correct and the switch needs to be adjusted down below the pop off pressure. To sdjust the switch, remove the cover of the box the cord comes out of.Adjust using the screw(s). There should be one for cut in and another for cutout pressuressures. The cut in pressure should be 90 psi and the cutout should be at 125 psi.If the pop off valve blows off at 125, It needs either replace or adjusting. It's best to replace it.since the spring inside has lost tension. You will be constantly adjusting it otherwise. Good Luck -Ned_ Take caution not to get your tool or fingers into the electrical in the switch box.

Apr 15, 2011 | Dewalt & 2HP Hand Carry Heavy Duty...

1 Answer

I replaced old pump w/ Flotec 1/2HP FP4012 and replaced old pressure tank w new 35gal tank. Pump primed but cycles on-off every minute constantly even w/ no water turned on. Goes to 50PSI, loses pressure...


The water and therefore the pressure has to be going somewhere. If you are sure that there are no leaks in the house or outside, then the water is going back into the well. There is a check valve either in the suction line of the pump between the top of the well and the pump or down in the well.
If this check valve fails, it allows water to go the wrong way and back to the well. The result is that you lose pressure.
Secondly, you have to be sure that there are no air leaks between the top of the well and the inlet to the check valve. Leaks in that piping will make repriming difficult.
Write back with more and I'll try to help more.
Gary

Jan 22, 2011 | Flotec Corrosion Resistant Shallow Well...

1 Answer

900 CFM 120 PSI 8 YRS OLD BLOWS OFF RELIFE VALVE BLOWS OFF AT 150 PSI NEED A DRAWING OF REGULATOR


when the regulator switches off it will push a needle into the blowoff valve. it blows off air in cilinderhead and pipe going to checkvalve. when it is blowing off constantly please check blowoffvalve under regulator. when it keeps blowing after stopping please clean up checkvalve very often smal rustparts causes these problems. good luck.

Feb 10, 2010 | Campbell Hausfeld Single Stage Air...

1 Answer

Wont air up tank pressure. motor runs & tank pressures to about 25lbs


below the pressure switch is a unloader valve which has a tendency to leak, undo that line and block it off, if this works you probabaly can leave it blocked off.

Dec 02, 2009 | Senco PC1010 1/2 HP 1 Gallon Mini Air...

1 Answer

I have a similar problem with the same compressor.


there is a check valve on the piston that has gone bad ,, i had the same problem on mine but a much bigger compressor and it was in the head on the piston on the intake side,, you need to get a gasket set and the valve and follow the directions and you will be fixed till the nest time

Jun 08, 2009 | Dewalt & 2HP Hand Carry Heavy Duty...

1 Answer

Campbell Hausfeld compressor has trouble starting


Sounds like your unloader valve is not releasing pressure in the line to the compressor. When it shuts off after filling up if you do not here the psssht that they make when it is releasing the air in the line to the pump. then the line is still full of pressure which makes it hard for the motor to start. Check your unloader valve.

Mar 30, 2009 | Campbell Hausfeld Single Stage Air...

2 Answers

Compressor runs fast but air pressure stays low


hi your problem seems to bee that your valves are either broken or not seating properly
visit your local dealer and purchase a new valve set once fitted your machine will work fine
hope this helps ian

Mar 24, 2009 | Campbell Hausfeld Single Stage Air...

2 Answers

With compressor running the relief line blows off


check that the non return valve is not stuck closed
hope this helps ian

Feb 24, 2009 | Campbell Hausfeld Single Stage Air...

1 Answer

Where does the small black tube go thats around pressure switch


SOUNDS LIKE ITS THE UNLOADER LINE. IT SHOULD ATTACH TO THE SIDE OF THE PRESSURE SWITCH SO THAT WHEN IT CUTS OFF THE ELECTRIC SWITCH TRIPS A VALVE TO UNLOAD THE AIR FROM THE LINE.

Jan 30, 2009 | Campbell Hausfeld Single Stage Air...

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