Brake chamber click?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Cw5110, Dec 28, 2013.

  1. Dec 28, 2013 #1
    Cw5110

    Cw5110 Heavy Load Member

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    I was always curious what the heck that noise was. When I leave my key in the on position and I hear like clicking noises coming from the brake chambers.
     
    Cw5110, Dec 28, 2013
    Cw5110, Dec 28, 2013
    #1
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  3. Dec 28, 2013 #2
    Inland-Pilot

    Inland-Pilot Light Load Member

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    automatic ABS system checks
     
    Inland-Pilot, Dec 28, 2013
    Inland-Pilot, Dec 28, 2013
    #2
    Cw5110, truckman29801 and Cetane+ Thank this.
  4. Dec 28, 2013 #3
    KeithT1967

    KeithT1967 Road Train Member

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    Inland nailed it. Every time you turn the key on the ABS system cycles the valves and does a continuity test of all the wheel sensors.
     
    KeithT1967, Dec 28, 2013
    KeithT1967, Dec 28, 2013
    #3
  5. Dec 28, 2013 #4
    Cw5110

    Cw5110 Heavy Load Member

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    Ohh cool appreciate it.
     
    Cw5110, Dec 28, 2013
    Cw5110, Dec 28, 2013
    #4
  7. Dec 28, 2013 #5
    GrapeApe

    GrapeApe Road Train Member

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    Once in a while hold the foot brake down with you turn the key on. Those clicks will be louder chuffs of air. It helps keep the modulators clean and working good to activate them with air pressure on them.
     
    GrapeApe, Dec 28, 2013
    GrapeApe, Dec 28, 2013
    #5
    KeithT1967 Thanks this.
  8. Dec 28, 2013 #6
    Pablo-UA

    Pablo-UA Road Train Member

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    early ABS systems click all modulators one by one, newer - one click with all modulators to test ABS/EBS voltage supply circuit.
     
    Pablo-UA, Dec 28, 2013
    Pablo-UA, Dec 28, 2013
    #6
  9. Dec 28, 2013 #7
    KeithT1967

    KeithT1967 Road Train Member

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    That's a great idea. Never thought about it before but doing this in winter would help clear condensation.
     
    KeithT1967, Dec 28, 2013
    KeithT1967, Dec 28, 2013
    #7
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