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Impossible to find air leak

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Ozdriver, Feb 8, 2017.

Page 4 of 9
  1. Feb 8, 2017 #31
    Ozdriver

    Ozdriver Heavy Load Member

    767
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    Oct 16, 2015
    Australia
    0
    It's 9.20 AM here and it's already 90 deg so I think I'll give it a miss today. It's going to be a lot cooler tomorrow. Just outside Melbourne, where you get four seasons in one day.
     
    Ozdriver, Feb 8, 2017
    Ozdriver, Feb 8, 2017
    #31
    Oxbow and passingthru69 Thank this.
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  3. Feb 8, 2017 #32
    Lyle H

    Lyle H Road Train Member

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    You don't happen to have a Cummins ISX do you?
     
    Lyle H, Feb 8, 2017
    Lyle H, Feb 8, 2017
    #32
  4. Feb 8, 2017 #33
    Cat sdp

    Cat sdp . .

    21,201
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    Orion's Belt
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    V8 Cat
     
    Cat sdp, Feb 8, 2017
    Cat sdp, Feb 8, 2017
    #33
    TGUNKEL Thanks this.
  5. Feb 9, 2017 #34
    daf105paccar

    daf105paccar Road Train Member

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    Crowded house?
     
    daf105paccar, Feb 9, 2017
    daf105paccar, Feb 9, 2017
    #34
    Ozdriver Thanks this.
  6. Feb 9, 2017 #36
    bavarian

    bavarian Heavy Load Member

    730
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    Feb 13, 2014
    Winnipeg
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    Did you check the spring brake chambers? When brakes released listen very carefully at the hole.
     
    bavarian, Feb 9, 2017
    bavarian, Feb 9, 2017
    #36
    Ozdriver Thanks this.
  7. Feb 9, 2017 #36
    AModelCat

    AModelCat Road Train Member

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    Have you checked the exhaust ports on your relay valves, foot treadle valve, trailer spike, retarder handle and park control valves? All those valves should have air supplied to them anytime the truck is aired up. Did you check your glad hands at back of truck for air leakage?
     
    AModelCat, Feb 9, 2017
    AModelCat, Feb 9, 2017
    #36
    Ozdriver Thanks this.
  8. Feb 9, 2017 #37
    lilillill

    lilillill Sarcasm... it's not just for breakfast

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    Possum Booger, Alabama
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    I pulled my instrument cluster out to change some bulbs and in the process, disturbed the air lines for the gauges (push in kind). It would leak all the air out in a couple hours just from those two tiny fittings.

    I replaced them with the regular compression fittings, as I do all of the quick connect fittings that leak.
     
    lilillill, Feb 9, 2017
    lilillill, Feb 9, 2017
    #37
    Ozdriver and daf105paccar Thank this.
  9. Feb 9, 2017 #38
    Ozdriver

    Ozdriver Heavy Load Member

    767
    1,390
    Oct 16, 2015
    Australia
    0
    Done all of that!
     
    Ozdriver, Feb 9, 2017
    Ozdriver, Feb 9, 2017
    #38
  10. Feb 9, 2017 #39
    Ozdriver

    Ozdriver Heavy Load Member

    767
    1,390
    Oct 16, 2015
    Australia
    0
    Done that. It's got brand new brake chambers on it as well. It was leaking air before I put them on.
     
    Ozdriver, Feb 9, 2017
    Ozdriver, Feb 9, 2017
    #39
  11. Feb 9, 2017 #40
    AModelCat

    AModelCat Road Train Member

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    What about the pressure gauges in the dash itself? Air accessory switches on the dash not leaking?
     
    AModelCat, Feb 9, 2017
    AModelCat, Feb 9, 2017
    #40
    Ozdriver and Oxbow Thank this.
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