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Parking brake problem volvo 670

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Jeet, May 3, 2013.

  1. May 3, 2013 #1
    Jeet

    Jeet Bobtail Member

    24
    4
    Jul 17, 2010
    0
    Need some help to figure out this on going problem lately, When parking brake is applied ( trailer only red out) i can hear sound of the air exiting out of the trailer Quick release valve right away. When i pull yellow and red at the same time, no air exhaust sound and the truck will move forward( slow on parking brake ). Now on bob tail its like 60 % normal and 40 % of times no air exiting from QR valve, but i can hear air slowing exiting from the front of the truck....wondering where to start...Thanks in advance for any inputs !!!!! BTW its a 07 volvo with the isx :((
     
    Jeet, May 3, 2013
    Jeet, May 3, 2013
    #1
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  3. May 3, 2013 #2
    boneebone

    boneebone Road Train Member

    2,294
    2,365
    Mar 13, 2009
    0
    Check the Foot Brake Valve, it's located under the hood, mounted on the driver's side firewall with alot of air lines coming out of it.
     
    boneebone, May 3, 2013
    boneebone, May 3, 2013
    #2
  4. May 4, 2013 #3
    nasriza

    nasriza Road Train Member

    2,397
    2,070
    Feb 1, 2013
    Chicago, IL
    0
    I just fixed an issue like this change the QR valve it's cheap and easy to change its probably getting stuck sometimes and not letting the air out of the brake system in order for the springs to take over.
     
    nasriza, May 4, 2013
    nasriza, May 4, 2013
    #3
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