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TRALER BRAKE WONT ACTIVATE WITH FOOT BRAKE PEDAL 2001 Volvo VNL

Discussion in 'Ask An Owner Operator' started by PHLDET, Jun 18, 2022.

  1. Jun 18, 2022 #1
    PHLDET

    PHLDET Bobtail Member

    2
    0
    Jun 18, 2022
    0
    Hello everyone,

    Did anyone have an issue with their air brakes like I'm having? Here's my problem: when i apply my brakes, only my truck brake activates and maybe 10% of my trailer brakes. Trailer brakes work fine because i used a different truck to test my trailer brakes and i used my truck to test different trailer and same problem. When i use hand brakes for trailer they stop just fine but not foot brakes. Foot brake valve has been replaced. Trailer protection valve has been replaced. But problem not fixed. I have 2001 Volvo VNL 630
     
    PHLDET, Jun 18, 2022
    PHLDET, Jun 18, 2022
    #1
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  3. Jun 19, 2022 #2
    Cdemars316

    Cdemars316 Light Load Member

    285
    1,222
    Nov 10, 2018
    0
    is your air pressure constant? if not your return line might be broke on your truck.
     
    Cdemars316, Jun 19, 2022
    Cdemars316, Jun 19, 2022
    #2
    Keepforgettingmypassword Thanks this.
  4. Jun 19, 2022 #4
    PHLDET

    PHLDET Bobtail Member

    2
    0
    Jun 18, 2022
    0
    Yes, it’s constantly at 120
     
    PHLDET, Jun 19, 2022
    PHLDET, Jun 19, 2022
    #4
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