Element 1 Outlet high temperature and Intercooler high pressure

by Agung
(Pringsewu, Lampung, Indonesia)


We have oil free compressor atlas copco zr 55.
After we replace oil seal ( seal ring p/n: 1202 5245 00) with non original part, we have this problem:

Element 1 Outlet Temperature reach 225 deg. Celcius.

Intercooler Pressure reach 3.9 bars.

Milky oil in oil tank.

We have checked intercooler, aftercooler, water separator, inlet valve, replace air cleaner; but all that actions didn't solve the problems.

Please share your experiences and knowledges.
Thank you.


Hello Agung,

The high pressure and the high temperature are related to eachother and are the same problem. Higher intercooler pressure will result in a higher temperature of low pressure element.

Your intercooler pressure is way too high. Normally it is around 2 - 2.5 bar only.

The high intercooler pressure indicates that probably something is wrong with the high pressure element.

it is not compressing good enough anymore, or high pressure air is blowing back to the intercooler.

Where exactly is this oil seal located? I don't have the partlist/manual of this machine with me right now.

Milky oil could indicate that compressed is air blowing bubbles into the oil somewhere. There is no water in the oil, is there? Let the compressor stand still for a while and check if the 'milkyness' is still there, and if water has collected at the bottom of the gearbox.

Hope this was helpful and let me know if you need more info. Good luck!

Click here to post comments

Join in and write your own page! It's easy to do. How? Simply click here to return to air-compressor-troubleshooting.

Troubleshoot Your Rotary Screw Compressor Today!

My new eBook Your Rotary Screw Compressor: Troubleshooting and Maintenance will show you:

  • How to troubleshoot problems yourself.
  • How to prevent the 6 common mistakes people make.
  • How to Prevent costly down time of your air compressor.
  • How to properly take care for your air compressor to avoid downtime.

Get your copy today! Click here

Hi, my name is Cas…
and I am crazy about air compressors!

Me and a portable air compressor

On this website, I will teach you everything I know about air compressors!
Most popular pages:

Air Compressor Buying Guide

Be sure to read my honest and independent buying guides before buying your air compressor.

I have written buying guides for both reciprocating compressors and rotary screw compressors.

Air Compressor Troubleshooting

Having proplems with your air compressor? Go to the troubleshooting pages for common problems and their fixes, or ask your own questions!

Latest Air Compressor News

For the latest news from the air compressor industry, and for the latest updates and tips from this website, visit my Air Compressor Blog.