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Air brake issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by truckerbangin, Oct 22, 2015.

  1. Oct 22, 2015 #1
    truckerbangin

    truckerbangin Light Load Member

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    Jan 22, 2013
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    Good day all my 96 kw t600 is letting air out the service line when i apply the brakes when i'm bobtailing. At first i thought it was a rear brake booster but turned out to be the service line letting the air out.
     
    truckerbangin, Oct 22, 2015
    truckerbangin, Oct 22, 2015
    #1
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  3. Oct 22, 2015 #2
    lots of character

    lots of character Road Train Member

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    Trailer supply valve must be dinked up
     
    lots of character, Oct 22, 2015
    lots of character, Oct 22, 2015
    #2
  4. Oct 22, 2015 #3
    bowtieboy77

    bowtieboy77 Light Load Member

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    Aug 16, 2013
    Southern, Ontario
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    The valve is also called a tractor protection valve. It will be located along the frame somewhere it depends on make. Not sure were kw puts them. follow service line from gladhand. Both service and supply lines connect to the valve.
     
    bowtieboy77, Oct 22, 2015
    bowtieboy77, Oct 22, 2015
    #3
    AModelCat and truckerbangin Thank this.
  5. Oct 22, 2015 #4
    lots of character

    lots of character Road Train Member

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    [​IMG]
     
    lots of character, Oct 22, 2015
    lots of character, Oct 22, 2015
    #4
    AModelCat Thanks this.
  7. Oct 22, 2015 #5
    AModelCat

    AModelCat Road Train Member

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    Tractor protection valve is done. The valve shuttles over when trailer supply button is pushed in, allowing service air to the trailer. Spool in the valve is probably gummed up and sticking. The valve on my W900A is located inside the left frame rail, next to the transmission.
     
    AModelCat, Oct 22, 2015
    AModelCat, Oct 22, 2015
    #5
    truckerbangin and lots of character Thank this.
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