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Mystery Air in Dash sound

Discussion in 'Volvo Forum' started by dphillips, Apr 25, 2018.

  1. Apr 25, 2018 #1
    dphillips

    dphillips Light Load Member

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    May 14, 2013
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    I have a 07 Volvo 670 with a Cummins ISX 870. usually when i hear air coming through the dash I'm Losing air in the trailer, but this is happening while bobtailed. I looked all over for and air leak and found one going into the Air governor quick connect when i press the brakes. I got the shop changing it but the dash noise only happens when I'm accelerating and about to switch to switch gears between 11- 1300 rpm, once all the way in gear pass 1300 it cuts out. a leak from the quick connect on the governor that only leaks while pushing the brakes shouldn't do that right?
     
    dphillips, Apr 25, 2018
    dphillips, Apr 25, 2018
    #1
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  3. Apr 25, 2018 #2
    cjb logistics

    cjb logistics Heavy Load Member

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    Air bags responding quicker with no load? Hear it all the time with my 10' split axle trailer running empty, especially when I get on quick, after a hard red light.
     
    cjb logistics, Apr 25, 2018
    cjb logistics, Apr 25, 2018
    #2
    dphillips and Tug Toy Thank this.
  4. Apr 26, 2018 #3
    Buckeye 60

    Buckeye 60 Road Train Member

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    sometimes it leaks from valve or fitting behind the dash .... sounds a lot like the leaky trailer sound but not quite the same ...... just had that happen .... wasn't too bad to fix
     
    Buckeye 60, Apr 26, 2018
    Buckeye 60, Apr 26, 2018
    #3
  5. Apr 27, 2018 #4
    terryt

    terryt Heavy Load Member

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    had the same thing on my 670 it was a bad brake chamber back feeding air through the parking brake valve.
     
    terryt, Apr 27, 2018
    terryt, Apr 27, 2018
    #4
    mtoo Thanks this.
  7. Apr 27, 2018 #5
    Buckeye 60

    Buckeye 60 Road Train Member

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    mine was leeking behind the parking brake valve but sounded about the same as when it back feeds
     
    Buckeye 60, Apr 27, 2018
    Buckeye 60, Apr 27, 2018
    #5
  8. Apr 28, 2018 #6
    mtoo

    mtoo Road Train Member

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    Like @terryt said, bad brake chamber will cause air leaking noise from dash brake valve.
     
    mtoo, Apr 28, 2018
    mtoo, Apr 28, 2018
    #6
  9. May 2, 2018 #7
    dphillips

    dphillips Light Load Member

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    May 14, 2013
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    Mechanic said it was a loose V band clamp on the EGR
     
    dphillips, May 2, 2018
    dphillips, May 2, 2018
    #7
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