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Tips for shimming slack adjusters

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Dino soar, Sep 21, 2019.

  1. Sep 21, 2019 #1
    Dino soar

    Dino soar Road Train Member

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    I'm putting new slack adjusters on my truck and I seem to be having a hard time shimming them so they are under .060.

    The kit gives me larger washers to put behind the slack adjuster and smaller washers to put in front of the circlip. I've tried different combinations and using the fat circlip or trying to stack more washers on and use to the thin circlip, but I can't seem to make them that snug.

    I am checking them with a dial gauge indicator.

    Any ideas?
     
    Dino soar, Sep 21, 2019
    Dino soar, Sep 21, 2019
    #1
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  3. Sep 21, 2019 #2
    spsauerland

    spsauerland Road Train Member

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    More washers! Meritor sells assortment bags of them.
     
    spsauerland, Sep 21, 2019
    spsauerland, Sep 21, 2019
    #2
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  4. Sep 21, 2019 #3
    Working2party

    Working2party Medium Load Member

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    A washer is a washer, Reuse the old ones also, just clean them up. The older trucks it was a big deal to shim under the slack to where it’s centered for the chamber rod. The newer parts have been built with better techniques. So it’s more standard.

    In your case put enough washers on to where the slack is centered. Stack enough on the outsides to where you just get the snap ring on. Take one small washer out and it’s there.
     
    Working2party, Sep 21, 2019
    Working2party, Sep 21, 2019
    #3
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  5. Sep 21, 2019 #4
    Dino soar

    Dino soar Road Train Member

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    They have an assortment that is different sizes than what they give you in the camshaft repair kit?
     
    Dino soar, Sep 21, 2019
    Dino soar, Sep 21, 2019
    #4
    Intothesunset Thanks this.
  7. Sep 21, 2019 #5
    Dino soar

    Dino soar Road Train Member

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    The problem is that in the camshaft repair kit they only give me two different size washers. One for the back of the slack adjuster and one for the front. They give me a bunch of them but there are only two sizes.

    It seems like whatever combination I put together in there I just can't get enough slack out or I can't get the snap ring on.
     
    Dino soar, Sep 21, 2019
    Dino soar, Sep 21, 2019
    #5
  8. Sep 21, 2019 #6
    starmac

    starmac Road Train Member

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    No need to use a dial indicator, they are not that critical, like said above usually with a combination of the new ones that come with the cam bushings and the old ones, a guy can get them close enough.
     
    starmac, Sep 21, 2019
    starmac, Sep 21, 2019
    #6
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