04 Freightliner ABS valve leaking

Discussion in 'Freightliner Forum' started by JRut, Mar 21, 2024.

  1. JRut

    JRut Light Load Member

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    Jul 11, 2012
    Texas
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    My big ABS valve is leaking from the rubber thing directly in the center when I push the brake pedal. It only happens when the parking brake is pushed in (released). I got a DOT violation from it today. Replace the valve or could it be a bad brake chamber? See pics attached.

    Screenshot_20240321_145024_Photos.jpg 20240321_091853~2.jpg
     
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  3. Big Road Skateboard

    Big Road Skateboard Road Train Member

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  4. JRut

    JRut Light Load Member

    185
    56
    Jul 11, 2012
    Texas
    0
    The words should be there now. Accidentally hit post before I put the text !
     
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  5. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    Pinch off the blue line between the quick release valve and the abs valve. It will probably quit leaking then.

    If so, replace the quick release valve.

    The quick release valve is smaller, and looks like this OPHS.jpeg
     
    QUALITYTRUCK, JRut and Concorde Thank this.
  6. JRut

    JRut Light Load Member

    185
    56
    Jul 11, 2012
    Texas
    0
    The shop rebuilt those air valves with new seals and it didn't fix the problem. So i had them replace the 2 front drive axle brake chambers and it fixed it. So turned out a bad brake chamber was my issue.
     
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