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air leaks out off red valve inside cab when engage some help as to why

Discussion in 'Freightliner Forum' started by gadomska, Dec 7, 2014.

Page 1 of 2
  1. Dec 7, 2014 #1
    gadomska

    gadomska Bobtail Member

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    Dec 7, 2014
    0
    Air leaks from red knob when apply for running to trailer
    As I apply brakes to slow down when park but knob on the push in hear air come out of it
     
    gadomska, Dec 7, 2014
    gadomska, Dec 7, 2014
    #1
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  3. Dec 7, 2014 #2
    dca

    dca Road Train Member

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    First things first.. check your glad seals.. brake cans.. air lines.. soap and water helps point out a leak.. call your company shop / road service
    .
     
    dca, Dec 7, 2014
    dca, Dec 7, 2014
    #2
  4. Dec 7, 2014 #3
    nikmirbre

    nikmirbre Road Train Member

    5,057
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    High Point NC
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    It may be the little grommet seal around the valve itself…...
     
    nikmirbre, Dec 7, 2014
    nikmirbre, Dec 7, 2014
    #3
  5. Dec 7, 2014 #4
    windsmith

    windsmith Road Train Member

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    Are you sure you are hearing air come out of it, or are you just hearing air going THROUGH it to the trailer?
     
    windsmith, Dec 7, 2014
    windsmith, Dec 7, 2014
    #4
  7. Dec 7, 2014 #5
    Lucar

    Lucar Road Train Member

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    Aug 22, 2012
    Texas
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    Maybe the air switch behind the dash. Cheap to replace
     
    Lucar, Dec 7, 2014
    Lucar, Dec 7, 2014
    #5
  8. Dec 7, 2014 #6
    ipogsd

    ipogsd Heavy Load Member

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    That what I'm thinking, big air leak down stream.
     
    ipogsd, Dec 7, 2014
    ipogsd, Dec 7, 2014
    #6
  9. Dec 7, 2014 #7
    dca

    dca Road Train Member

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    Earth
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    Just in case.. Soap and water in a spray bottle .. spray on outside
     
    dca, Dec 7, 2014
    dca, Dec 7, 2014
    #7
  10. Dec 7, 2014 #8
    gadomska

    gadomska Bobtail Member

    2
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    Dec 7, 2014
    0
    Will check out it seems to only happened with trailer attached thanks to all for help and merry xmas
     
    gadomska, Dec 7, 2014
    gadomska, Dec 7, 2014
    #8
  11. Dec 7, 2014 #9
    BIF MALIBU

    BIF MALIBU Heavy Load Member

    727
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    May 21, 2010
    lake cushman wa
    0
    almost always a brakecan diaphragm. turn off engine so you can hear and find it under trailer. if it fails brake will start smoking. if not cop at scale will find it for you
     
    BIF MALIBU, Dec 7, 2014
    BIF MALIBU, Dec 7, 2014
    #9
  12. Dec 24, 2014 #10
    Bigman58

    Bigman58 Light Load Member

    60
    11
    Feb 12, 2014
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    His rates are really high!
     
    Bigman58, Dec 24, 2014
    Bigman58, Dec 24, 2014
    #10
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