Question about Ingersoll Rand Air Tools & Compressors

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Ingersoll manual IR MM75

No loading and unloading

Posted by Anonymous on

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Posted on Jan 02, 2017

  • 22 Answers

SOURCE: Where can I find the owner's manual for an IR Type 30 model 25T

IR has not made their owner's manuals available online. You have to contact your nearest dealer in order to get one. If you do get one, could you please consider uploading the manual to fixya.com to help other people who a looking for the same thing.

Posted on May 13, 2009

  • 1 Answer

SOURCE: ingersoll Rand SSR compressor shuts down loaded or

When it shuts down, press DISPLAY SELECT button once and use the up down arrows to see the code just before shutdown.

HIGH AIREND TEMP

HIGH AIR PRESSURE

LOW SUMP PRESSURE

PRESSURE OR TEMP SENSOR FAIL

CHECK MOTOR ROTATION

MOTOR OVERLOAD

FAN MOTOR OVERLOAD

STARTER FAULT

I am assuming this has a Intellisys controller.

Posted on Sep 25, 2009

  • 205 Answers

SOURCE: Ingersoll rand compressor type 30

It sounds like the pressure switch is bad or out of adjustment. Typically the pressure switch is set at 175psi on a 2340. If the auxillary valve you are speaking of is on the pressure switch and is constantly blowing air from it you have a bad receiver tank check valve. Also if you are getting a lot of oil out the valve at the pressure switch you may have some oil control rings bad.

Posted on Feb 10, 2011

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1 Answer

I have a Model# SSR-EP10 IR compressor that wants to start loaded, if I release the load it fills up and then cuts off with out going to unload and then when it calls for air it try to start loaded.


How are you unloading it? There is an unloader valve that is usually a manual lever connected to the regulator. 0531-051 - DIAPHRAGM,UNLOADER for Ingersoll Rand compressors

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1 Answer

We have a IR model UP6-25-125 Constantly unloading like it has a stuck solenoid. Any suggestions?


Hi rejohnson964...
Repair or replace your unloader valve...it is causing your trouble.
Please take time to rate me

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I have a 1990 T30 Ingersoll rand Air compressor I got it off a service truck and want it to be in the shop and it has a problem kick over the new starter I have just got, it has a key turn switch on it and...


I am guessing this is a gas engine driven unit. It sounds like the unloader is bad. the unloader has a manual lever on it. It looks like a little aluminum handle. you should be able to move it to a vertical position to relieve pressure while starting the engine. air will exhaust out the end of the valve body if it is working. if there is no handle or little aluminum lever it may have been broken off which is a common occurance. for a test you can remove the discharge line from the compressor or at the unloader valve.Then see if you engine will start. If it starts replace the unloader valve.

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Hard starting does this model have an unloader


There are two types of unloaders used on IR compressors. One is oil pressure controlled, and second is manually activated for starting. According to the photo and model number provided, yours is manually operated. Follow air line from compressor to tank. The pilot valve (brass valve) between airline and tank is a multi-function component. There is a flip leaver or pull ring w/ hold that unloads the compressor by venting air thru small muffler. The valve also contains the check-valve holding pressure in the tank, a means of adjusting pressure and controlls throttle for engine. For easy start, flip leaver upright and start; to run, flip leaver to right angle of stem.

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