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Old 12-19-2011, 08:25 PM
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Adjusting the pressure on my air compressor

I recently bought an Ingersoll Rand air compressor from tractor supply. It pumps a maximum of 135psi @ 15.5 CFM. I don't really need this much pressure, plus the pump seems to labor above 100psi so I would like to adjust it down to about 90. I've heard that some switches aren't adjustable. This seems to be what I've got, but I'm not sure. Can someone tell me what to look for to adjust the pressure on a shop aircompressor like mine? Any advice or suggestions would be helpful. Thanks.

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Old 12-19-2011, 11:09 PM
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Not sure what is on your air compressor? I connected a regulator on my compressor. It basically goes into the line. The regulator has a small handle underneath that you turn to adjust the amount of air pressure you need. The guage on top allows you to adjust. For example, most air tools run on 80-90 lbs of air pressure. You can set the regulator to allow no more than 80 or 90 lbs of air. They sell air compressor regulator all over the internet. I also have a water trap in the line which collects moisture from the compressor air. Mandatory of your using air tools or spray guns.
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Old 12-20-2011, 12:03 AM
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If you have pictures of the wiring or the contact assembly

should be fairly simple to make work or adjust
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Old 12-20-2011, 01:51 AM
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Does your compressor not have a regulator?

If not, you need one.
It's not an electrical device, it limits and controls the output of your compressor.
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Old 12-20-2011, 04:46 AM
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http://www.youtube.com/watch?v=wxhas...eature=related
http://www.youtube.com/watch?v=JaILD0DXjHE

If you see this box in the video you will see a set screw and a lock nut

CAUTION ELECTRICAL WIRES HAVE VOLTAGE PRESENT.use an insulated screw driver if you have one,safety first.

If yours has this type of switch,if not a box with a control contractor will be

present its a pneumatic over air pressure switch in it and they can be adjusted easily.
(basically a pressure switch hooked to an electrical contactor)

135psi @15.5 takes a serious amount of current,be very careful when adjusting.

Both videos are good but the second one is good and uses basic switch
need help DONT HESITATE hope this helps
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Old 12-20-2011, 08:23 AM
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Unplug or disconnect the compressor when adjusting. Or at least turn off the breaker, and check for power to ground before you do anything else.
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Old 12-20-2011, 05:56 PM
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Thanks for the advice everybody. I'm going to put a regulator on it I was just looking for a way to turn it down so it wouldn't work the motor so hard. It looks like my pressure switch isn't adjustable so I'll just leave it as it is for now. Don't want to mess up my warranty just yet.
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