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Secondary air dropping

Discussion in 'International Forum' started by jchief, Dec 18, 2015.

Page 1 of 3
  1. Dec 18, 2015 #1
    jchief

    jchief Bobtail Member

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    May 14, 2014
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    Hey guy's, got an issue driving me nuts.

    Have an 06 9400i, air builds fine but secondary drops as soon as the compressor kicks out and falls hard and compressor kicks back on in under a minute. If I kill the truck the air doesn't fall near as bad.

    HELP
     
    jchief, Dec 18, 2015
    jchief, Dec 18, 2015
    #1
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  3. Dec 18, 2015 #2
    mountaingote

    mountaingote Road Train Member

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    You have an air leak somewhere, probably on your suspension
     
    mountaingote, Dec 18, 2015
    mountaingote, Dec 18, 2015
    #2
  4. Dec 18, 2015 #3
    Heavyd

    Heavyd Road Train Member

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    If you have an ISX it is probably the turbo actuator solenoid on the left side of the engine, air line to turbo or turbo actuator itself that is leaking massive air. This is one thing that the engine has to be actually running for it to be energized. Also, check your fan hub for leaking with the key on, engine off.
     
    Heavyd, Dec 18, 2015
    Heavyd, Dec 18, 2015
    #3
    taxihacker66 and G13Tomcat Thank this.
  5. Dec 18, 2015 #4
    RustyBolt

    RustyBolt Road Train Member

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    I'll add that if you release the air to your trailer and it still drops, it's on your truck somewhere. Fill the tanks and shut off the truck. If it drops, you should be able to hear it. If it doesn't drop, like the other fellas said, check turbo actuator and fan clutch.
     
    RustyBolt, Dec 18, 2015
    RustyBolt, Dec 18, 2015
    #4
  7. Dec 18, 2015 #5
    jchief

    jchief Bobtail Member

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    Thanks guys. It is definitely the truck. Found a leak under brake. Going fix that one and go from there

    Heavy, it is an ISX and ill check those also
     
    jchief, Dec 18, 2015
    jchief, Dec 18, 2015
    #5
  8. Dec 19, 2015 #6
    jchief

    jchief Bobtail Member

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    Doesn't leak with key on and motor not running. Sprayed actuator with soapy water and it didn't show a leak.
     
    jchief, Dec 19, 2015
    jchief, Dec 19, 2015
    #6
  9. Dec 19, 2015 #7
    Heavyd

    Heavyd Road Train Member

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    Ok, probably the turbo actuator solenoid then.
     
    Heavyd, Dec 19, 2015
    Heavyd, Dec 19, 2015
    #7
    G13Tomcat Thanks this.
  10. Jan 11, 2016 #8
    jchief

    jchief Bobtail Member

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    I'm back.

    Put truck in shop, Intentional draler, and they can't figure out what is leaking. Isolated fan clutch and I isolated turbo and it is still falling.

    Help please.
     
    jchief, Jan 11, 2016
    jchief, Jan 11, 2016
    #8
  11. Jan 11, 2016 #9
    Heavyd

    Heavyd Road Train Member

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    If you put shop air to the compressor discharge can you track it down that way?
     
    Heavyd, Jan 11, 2016
    Heavyd, Jan 11, 2016
    #9
  12. Jan 20, 2016 #10
    jchief

    jchief Bobtail Member

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    May 14, 2014
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    Sorry Heavy, been out of pocket a while. Don't know if it is possible or not. Truck has been at International Truck of Acadiana since Dec 21 and they still have not found the leak or fixed it.

    I am getting truck tomorrow and will see if there is some way that I can hook up the air. I am loosing 20 lbs of air in about 75 seconds. Kill truck an the air drops 10 pounds immediately then slows significantly.
     
    jchief, Jan 20, 2016
    jchief, Jan 20, 2016
    #10
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