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Losing air 5-6 psi per minute while driving

Discussion in 'Ask An Owner Operator' started by Forever237, May 18, 2019.

Page 2 of 4
  1. May 18, 2019 #11
    Forever237

    Forever237 Light Load Member

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    May 29, 2016
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    Checked brake chamber and lines with soapy water and sprayer. No leak all of them.

    Need to check air dryer and fan clutch.
     
    Forever237, May 18, 2019
    Forever237, May 18, 2019
    #11
    PE_T Thanks this.
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  3. May 18, 2019 #12
    Forever237

    Forever237 Light Load Member

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    May 29, 2016
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    Yes it is auto trans
    Tried that with/without applied brake. It doesn’t lose as wildly as while driving.
     
    Forever237, May 18, 2019
    Forever237, May 18, 2019
    #12
  4. May 18, 2019 #13
    speedyk

    speedyk Road Train Member

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    Apr 8, 2015
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    Could the wind be pulling on an air hose and tweaking a glad hand or trailer connection?
     
    speedyk, May 18, 2019
    speedyk, May 18, 2019
    #13
  5. May 18, 2019 #14
    Forever237

    Forever237 Light Load Member

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    May 29, 2016
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    Thanks i’ll check That too.

    It doesn’t fall bellow 100 but compressor is getting overworked
     
    Forever237, May 18, 2019
    Forever237, May 18, 2019
    #14
  7. May 18, 2019 #15
    flood

    flood Road Train Member

    4,163
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    Dec 25, 2010
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    some of the auto's use AIR to shift....so check there
     
    flood, May 18, 2019
    flood, May 18, 2019
    #15
    rank, Socal Xpress and Forever237 Thank this.
  8. May 18, 2019 #16
    kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

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    Does it do the same bobtailing?
     
    kemosabi49, May 18, 2019
    kemosabi49, May 18, 2019
    #16
  9. May 18, 2019 #17
    Forever237

    Forever237 Light Load Member

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    May 29, 2016
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    Yep.
     
    Forever237, May 18, 2019
    Forever237, May 18, 2019
    #17
  10. May 18, 2019 #18
    Cam Roberts

    Cam Roberts Road Train Member

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    May 13, 2018
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    i agree with this statement. my truck drops down like this
     
    Cam Roberts, May 18, 2019
    Cam Roberts, May 18, 2019
    #18
  11. May 18, 2019 #19
    D.Tibbitt

    D.Tibbitt Road Train Member

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    Apr 26, 2013
    Gettin' down westbound
    0
    Definatly check the transmission.. My dt12 auto shifts with air and i had a leak in mine, wasnt losing as much air as u were but i notice my air was spitting off more frequently while driving and i put it in the shop and they found a fitting leaking air on tranny. No idea where its at, but the mechanic say its a common problem on the cascadia , but its been good ever since, that was probably 3 months ago
     
    D.Tibbitt, May 18, 2019
    D.Tibbitt, May 18, 2019
    #19
    nextgentrucker, Vampire, Forever237 and 2 others Thank this.
  12. May 20, 2019 #20
    Forever237

    Forever237 Light Load Member

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    May 29, 2016
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    Checked with TA they said it might be transmission gear box failure. Heading to dealership.
     
    Forever237, May 20, 2019
    Forever237, May 20, 2019
    #20
    Vampire and D.Tibbitt Thank this.
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