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Cummins air compressor question.

Discussion in 'Trucks [ Eighteen Wheelers ]' started by custm2500, May 14, 2013.

Page 1 of 2
  1. May 14, 2013 #1
    custm2500

    custm2500 Bobtail Member

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    May 14, 2013
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    I have a 90something ford with a cummins. The air system is getting a ton of oil in it. My guess is the oil seems to skim off the top end of the engine to lube the compressor. Does it make sense that they oil passages in the engine are clogged and keeping too much oil in the top end, thus flooding the compressor?

    Thanks for the help.
     
    custm2500, May 14, 2013
    custm2500, May 14, 2013
    #1
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  3. May 14, 2013 #2
    Heavyd

    Heavyd Road Train Member

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    Most modern air compressors get their air intake from either the air cleaner housing or piping, or from the intake manifold of the engine. Older compressors had their own little air filter and intake. When you have oil in the air system, your compressor is passing oil some how. It could be from a restricted air intake and sucking some oil through its own rings, but the most likely problem is a worn out compressor and oil is simply getting past the rings.
     
    Heavyd, May 14, 2013
    Heavyd, May 14, 2013
    #2
    cetanediesel Thanks this.
  4. May 14, 2013 #3
    eeb

    eeb Heavy Load Member

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    Try replacing the air filter for the compressor first, maybe you'll get lucky.:)
     
    eeb, May 14, 2013
    eeb, May 14, 2013
    #3
  5. May 14, 2013 #4
    nasriza

    nasriza Road Train Member

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    Chicago, IL
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    Try replacing the air compressor probably worn out if you have a clogged oil passage you're engine would have blow up or locked up by now if its not getting enough oil to bottom end
     
    nasriza, May 14, 2013
    nasriza, May 14, 2013
    #4
    cetanediesel Thanks this.
  7. May 16, 2013 #5
    custm2500

    custm2500 Bobtail Member

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    May 14, 2013
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    The intake for the compressor seems to go into the valve cover. There is a short piece of rubber hose that mounts the two hard lines. It is soaked around the edges like too much oil is there and then the tanks dump oil when out of the pressure relief. I don't really want to replace a compressor till it is more solified that is the problem. Maybe there is simply a baffle that doesn't allow as much oil down the tube.
     
    custm2500, May 16, 2013
    custm2500, May 16, 2013
    #5
  8. May 20, 2013 #6
    custm2500

    custm2500 Bobtail Member

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    May 14, 2013
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    I came to the forum for expertise and that is what I got. The compressor is shot and I ordered one today! Thanks for your help. How complicated is this job? Seems easy but my only concern is the fuel pump is behind the compressor. Is this the high pressure pump and is there anyway I will mess up the timing of the engine? Or is the shaft splined to only fit one way?

    Thanks again!
     
    custm2500, May 20, 2013
    custm2500, May 20, 2013
    #6
  9. May 20, 2013 #7
    nasriza

    nasriza Road Train Member

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    Chicago, IL
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    That pump has a spider in between its a small plastic wheel looks like a small gear with 6 big teeth make sure you put it back and the fuel pump sits properly its bit that hard to remove also make sure the compressor goes in easy and don't pull it in with the bolts whatever you do cu you can do some serious damage to the gears if not lined up properly.
     
    nasriza, May 20, 2013
    nasriza, May 20, 2013
    #7
  10. May 20, 2013 #8
    custm2500

    custm2500 Bobtail Member

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    May 14, 2013
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    Thanks. So a plastic bushing on the fuel pump and it should slide togather like a driclveshaft. Smooth.
     
    custm2500, May 20, 2013
    custm2500, May 20, 2013
    #8
  11. May 20, 2013 #9
    nasriza

    nasriza Road Train Member

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    Chicago, IL
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    It's not a bushing it's a coupler it matches up the back of the compressor to the fuel pump splines
     
    nasriza, May 20, 2013
    nasriza, May 20, 2013
    #9
  12. May 23, 2013 #10
    custm2500

    custm2500 Bobtail Member

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    May 14, 2013
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    The compressor came in yesterday so I will be swapping this out when I get to work today. Seems simple enough!
     
    custm2500, May 23, 2013
    custm2500, May 23, 2013
    #10
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