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Air leak can’t find

Discussion in 'Peterbilt Forum' started by ausr2021, Jan 11, 2021.

  1. Jan 11, 2021 #1
    ausr2021

    ausr2021 Bobtail Member

    1
    0
    Jan 11, 2021
    0
    Have a 2015 579 that leaks off air while parked , ive replaces the 4 suspension bags the leveling valve the sleeper bags still after parked 45/50 min with truck off suspension drops air tanks empty with both valves pulled had it to 2 truck stops over pit can’t hear or find leak crawled under with soapy water spraying everywhere I can think nothing any ideas
     
    ausr2021, Jan 11, 2021
    ausr2021, Jan 11, 2021
    #1
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  3. Jan 11, 2021 #2
    kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

    10,008
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    Jan 13, 2013
    SW Arkansas
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    Have you isolated the problem to the tractor?
     
    kemosabi49, Jan 11, 2021
    kemosabi49, Jan 11, 2021
    #2
    D.Tibbitt Thanks this.
  4. Jan 12, 2021 #3
    magoo68

    magoo68 Road Train Member

    3,393
    5,383
    Jun 11, 2011
    st malo mb canada
    0
    Dump air to suspension and see if leak is there still. On a 2015 t680 (sister truck to a 579) they have a huge junction box of airlines right under drivers seat that was leaking on mine. It took a day plus to repair because they have to take half the truck apart to get at it . Warranty saved a huge bill.
     
    magoo68, Jan 12, 2021
    magoo68, Jan 12, 2021
    #3
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