Air Brakes

Discussion in 'Peterbilt Forum' started by ReaperTrucking, Feb 14, 2023.

  1. ReaperTrucking

    ReaperTrucking Bobtail Member

    2
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    Feb 14, 2023
    0
    Question on brake system.
    When my air tanks fill. I turn of my truck then turn the key to the on position wait for the lights to clear, then I hold down my brake pedal. While holding down I hear a quick air release six different times from what appears to be the brake chambers/slack adjusters. What is that performing? Someone told me it's adjusting my brakes. Is this true?
     
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  3. Snailexpress

    Snailexpress Road Train Member

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    Apr 28, 2014
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    ABS module does chaffing test. Testing air brake modulators.
     
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