07' Freightliner clutch adjustment issue, slipping at the top of the pedal.

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by kpwise509, Feb 8, 2021.

  1. kpwise509

    kpwise509 Bobtail Member

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    Apr 25, 2017
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    So we bought a 2007 freightliner century st120 with a 515hp 14l detroit. It runs good but the clutch is slipping and at top of pedal.
    My dad has it at his house and is trying to follow the adjustment procedure to try an easy fix before replacing. He said there is quite a bit more gap than the 1/2" that it should have with clutch depressed. The problem is when he turns the adjustment bolt it turns pretty easily but nothing happens. The gap isn't closing up. Any ideas?
     
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  3. AKDoug

    AKDoug Medium Load Member

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    Mar 21, 2018
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    Has someone else messed with it? You should have someone pressing the clutch in before turning the bolt, and you have to push in to turn the adjuster bolt. If it's turning freely without either of these, it's toast and time for a new clutch.
     
    Goodysnap Thanks this.
  4. Goodysnap

    Goodysnap Road Train Member

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    Pull the adjuster out and see if its stripped or broken. Sounds like someone tried to adjust it without pushing the pedal down or maybe went the wrong way.

    As stated above, if the adjusters not broken or damaged, its clutch time.

    Again clutch must be released when adjusting.
     
    ibcalm19 Thanks this.
  5. kpwise509

    kpwise509 Bobtail Member

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    Apr 25, 2017
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    Will do. He did have the pedal depressed when trying.

    Thank you.
     
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