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Brake problem

Discussion in 'Volvo Forum' started by waltherz, Mar 23, 2014.

Page 1 of 2
  1. Mar 23, 2014 #1
    waltherz

    waltherz Light Load Member

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    I VAVE VOLVO 04 W/VOLVO ENGINE 465, WHEN I PUSH THE BRAKE PEDAL, TRAILER DOESN'T BRAKE. THE RED BOTTON IF I PRESS, IT NOT SEND AIR TO TRAILER'S BRAKE. I REPLACED AIR VALVE UNDER CAB (WHERE IS CONECTED BRAKE'S HOSES) AND NOTHING. ANY IDEA?
    tHANKS, WALTER
     
    waltherz, Mar 23, 2014
    waltherz, Mar 23, 2014
    #1
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  3. Mar 23, 2014 #2
    baha

    baha Road Train Member

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    CK. trailer protec. valve at end of lines at rear of sleeper to see if air is back there yet?
     
    baha, Mar 23, 2014
    baha, Mar 23, 2014
    #2
  4. Mar 23, 2014 #3
    waltherz

    waltherz Light Load Member

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    Dec 12, 2012
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    I replaced. When i press the red boton isn't send air for release trailer's brake. Trailer still blocked until air get 120 psi and then it release the trailer's brake.
     
    waltherz, Mar 23, 2014
    waltherz, Mar 23, 2014
    #3
  5. Mar 23, 2014 #4
    baha

    baha Road Train Member

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    Trailer protection valve is at the rear of sleeper before air lines change over to the plastic flex lines, ck. if air is back there before it gets to 120lbs.
     
    baha, Mar 23, 2014
    baha, Mar 23, 2014
    #4
  7. Mar 23, 2014 #5
    waltherz

    waltherz Light Load Member

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    I'll check again with low pressure. When i replaced that valve, before to conect all lines, i press the red boton and air get there. But after conect all lines, the air dosen't pass thru the valve to the red hose.
     
    waltherz, Mar 23, 2014
    waltherz, Mar 23, 2014
    #5
  8. Mar 23, 2014 #6
    baha

    baha Road Train Member

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    It not the vavle in dash you need to CK. but the one at rear of lines under sleeper
     
    baha, Mar 23, 2014
    baha, Mar 23, 2014
    #6
  9. Mar 23, 2014 #7
    waltherz

    waltherz Light Load Member

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    Dec 12, 2012
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    tHE REAR LINE'S VALE IS NEW. DO YOU THING DASH'S VALVE IS FAILING?
     
    Last edited: Mar 23, 2014
    waltherz, Mar 23, 2014
    waltherz, Mar 23, 2014
    #7
  10. Mar 23, 2014 #8
    baha

    baha Road Train Member

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    Sorry does red button pop out at low press. if not it needs new one, they can go bad.
     
    baha, Mar 23, 2014
    baha, Mar 23, 2014
    #8
  11. Mar 23, 2014 #9
    baha

    baha Road Train Member

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    ? did you use a reconn. air valve when you replaced trailer pro. valve, might be bad out of box
     
    baha, Mar 23, 2014
    baha, Mar 23, 2014
    #9
  12. Mar 23, 2014 #10
    waltherz

    waltherz Light Load Member

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    Dec 12, 2012
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    Yes, both button pop out w/ low pressure.
     
    waltherz, Mar 23, 2014
    waltherz, Mar 23, 2014
    #10
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