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IR 75I COMRESSOR AIREND DISCHARGE TEMPERATURE HIGH WHY

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This problem could be due to several items. Low oil level, Bad temp.probe. Cooler stopped up or dirty and not allowing enough air flow thru it or maybe a thermostat. Also temp. in compressor area can be causing problem also.

Posted on May 15, 2017

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Posted on Jan 02, 2017

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SOURCE: 7.5 tas high airend temperature

1. Check your oil level, top up, or totally replace it

2. Check your cooler (Radiator looking thing) blow it out with a blow gun

3. Check your thermo valve (may need replacing)

4. Is the room that your compressor is in very warm, ambient air is a big factor in the running of your compressor

5. Do you have all the panels fitted to the machine? These are needed to aid airflow past your air-end

These are the main causes of high air end temperature. It may just need a good service

Hope this helps

Posted on Aug 30, 2012

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Ingersoll rand compressor model no 75i high airend discharge temperature trip why


Wash the cooler first. Then replace thermostat if washing cooler d't take care of the problem.oesn

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Dirty coolers are always associated with high discharge temps,always make sure your coolers are clean
compressor oil filters being clogged can also raise your temp n cause the unit to over heat,and on the much bigger machines if the compressor oil pump fails then you will have severe over heating as the oil flow to the cooler is assisted by the pump!!things like regulating pressure should always be adjusted to the machines specs so it doesn't over pressurize n put load on your airend while the engine is at idle.

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7.5 tas high airend temperature


1. Check your oil level, top up, or totally replace it

2. Check your cooler (Radiator looking thing) blow it out with a blow gun

3. Check your thermo valve (may need replacing)

4. Is the room that your compressor is in very warm, ambient air is a big factor in the running of your compressor

5. Do you have all the panels fitted to the machine? These are needed to aid airflow past your air-end

These are the main causes of high air end temperature. It may just need a good service

Hope this helps

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I have IR 2000 air compressor and it ejects large amounts of coolant out of the air inlet. It seems like this occurs more so when it is hot. This has only happened with IR air compressors.


I need to know if this is a rotary screw compressor or a piston compressor. Ir makes a 2000 in both. If this is a older ssr2000 rotary I would first look at the minimum pressure check valve. It is located on top of the seperator tank. The top cap will screw off. In it is a large spring ,a piston ,a small spring and a disc with teflon seat. check the teflon seat. Make sure all are clean and slide in the bore of the valve freely. I use sil glide lubricate from napa to lubricate all parts. if the o-ring is damaged it will need replacing. I usually get a kit from IR if any parts need replacing. Reassemble. the next place to look is on the 4 " line from the bottom of the airend to the seperator tank. In this line close to the airend between a flange is the check valve. If you remove it look closely at the orientation of this valve. If not reinstalled properly it will not close and let large amounts of oil back into the airend. check for wear, sticking etc. It should be very free and close easily.

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Get yourself a temperature gun and check a couple things:
1) Measure the oil injection temperature to the airend. This is a line going into the bottom side of the airend. 2) Measure the discharge temperature from the airend (this should be the same reading as the temperature gauge/readout on the compressor, but check to be sure)
You should get a temperature rise of about 25-30 degrees F over the airend. If you have more rise, you probably have an oil restriction: try an oil filter change.
If your oil injection temp is more than 160 degrees F or so, check the operation of the thermostatic valve. The thermo valve is a T shaped valve in the oil circuit. The oil line out of the bottom of the sump probably goes to a tee which splits flow to the cooler and the thermo valve. The oil goes through the cooler then to the other side of the thermo valve. The thermo valve should then mix the hot oil from the sump and the cool oil from the cooler to maintain the injection temp in the 150-160 degree range.
If you have cool oil coming from the cooler (should be maybe 140 F or less, and the injection temp is high, the thermo valve is bad. You can get a thermostat kit from your vendor to repair. If you've replaced the cooler, this thermo valve is probably the problem.

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