Ingersoll Rand 185 blowing air out of pressure relief valve

Published Categorized as Air Compressor Leaking Air, Air Compressor Valves, Ingersoll Rand 2 Comments on Ingersoll Rand 185 blowing air out of pressure relief valve

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1987 Ingersoll Rand 185 blowing air out of pressure relief valve.

The air compressor is starting fine but when i push the air button the pressure relief valve blows out air and oil

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An older Ingersoll Rand P-185 air compressor
An older Ingersoll Rand P-185 air compressor

Seperator
by: Carls421

You need to replace your seperator filter, its blocked and wont let air through it which causes the safety valve to blow

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Another solution
by: Anonymous

Had same issue diaphragm in unloader was torn cost about 60$ now works perfect.

Of course had to adjust regulator as well.

Could see where if regulator not working properly could cause same issue.

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IR 185 continuously builds air…
by: Anonymous

what if it’s not the diaphragm in the regulator? And has new separator filter and still keeps building air.

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Safety Valve
by: Carl

Depends on which safety valve you’re talking about…
The one inside the compressor or the one on the air receiver (tank)

Existing Ingersoll Rand P185 tow behind compressor pages:


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I am having the same issue as being described here. I replaced the separator and still have the issue. I disassembled the unloader but do not see any type diaphram.

Is this the unloader valve you guys are referring to?

Probably, if that’s what you found in your manual.
You have a PRV that’s blowing? At what pressure?