Air dryer purging oil?

Discussion in 'International Forum' started by CraigInReston, May 12, 2021.

  1. CraigInReston

    CraigInReston Light Load Member

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    Apr 6, 2017
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    Well here we go again... New air compressor (timed properly) with ISX CM871 engine, new air lines and air dryer and still losing oil out purge valve on dryer. This is 2nd compressor in less than 1 year and 1st one contaminated dryer with oil. Air restriction at charge air cooler? No oil loss at turbo and intake manifold is clean. The ISX compressor has no oil lines, just coolant. Oil is supplied to compressor from front gear cover. What am I missing here?
     
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  3. Heavyd

    Heavyd Road Train Member

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    Plugged intake to the compressor, or oil drain back into the front cover is partially blocked off. Or, poor reman.
     
  4. CraigInReston

    CraigInReston Light Load Member

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    Apr 6, 2017
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    Thanks for the reply Heavyd. I'll pull off compressor and check oil drain for blockage. I still have original air cooler on truck. If there was a restriction through the cooler, would that cause my problem, if so, how do you check for intake restriction?
     
  5. Heavyd

    Heavyd Road Train Member

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    Just pull the intake line off to the compressor and inspect the inside of it. Check the connection fittings too.
     
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