Trash in air dryer

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Kindallb6, Mar 29, 2023.

  1. Kindallb6

    Kindallb6 Bobtail Member

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    Mar 29, 2023
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    Just installed new compressor and air dryer in Cummins ISX15 and trash is still collecting in air dryer not allowing truck to go past 50psi. Where could this be coming from?
     
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  3. JB7

    JB7 Medium Load Member

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    Dec 13, 2022
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    What kind of trash is collecting? Double check that the lines are connected properly. What model air drier? I would also check the unloader valve. Even new parts are not 100% w/o problems.
     
  4. Kindallb6

    Kindallb6 Bobtail Member

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    Mar 29, 2023
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    It’s the bendix 801266. Looks like oily dirt coming out of the dryer.
     
  5. Goodysnap

    Goodysnap Road Train Member

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    Carbon from the engine or oil buildup from old compressor pushing oil or a combination of both.

    Best to replace the entire discharge line with new. The stainless tube and the cloth.Make sure all the fittings are clean.
     
  6. JB7

    JB7 Medium Load Member

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    Dec 13, 2022
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    upload_2023-3-29_9-45-31.png
    You may not have the reservoir but the lines (routing) should be the same. Like Goodysnap said, best to replace the discharge line. If it still won't build past 50psi I would remove and check the unloader valve.

    upload_2023-3-29_9-48-9.png
     
    Goodysnap Thanks this.
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