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Brake Rod Jam nuts

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  • Brake Rod Jam nuts

    Something has troubled me since I rebuilt my brakes.

    Why are there Jam Nuts on the brake rods when both ends of the rods are captured by a clevis pin and cotter pin?

    With Henry being so frugal, one would think he wouldn't need the expense of this nut. What am I missing?
    You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!

  • #2
    Because it prevents the threads from pulling out of the clevis. The jam nut locks it in to prevent that from happening. It's a safety feature
    3 ~ Tudor's
    Henry Ford said
    "It's all nuts and bolts"

    Mitch's Auto Service ctr


    • George Miller
      George Miller commented
      Editing a comment
      Has got it. The threads would get worn over a period of time. They would get real loose then strip. There is a lot of force on those rods.

  • #3
    Hmmm, ya know, as simple as that seems. it does make sense. Thinking about it, if the threads get a bit worn, they would shift in the clevis and loosen up and eventually strip themselves out.

    Damn clever.
    You wana look waaay far up da road and plan yer route because the brakes are far more of a suggestion than a command!


    • #4
      On worn pins and clevises you can slightly "cock" the clevis, tighten the nut . Reduces rattle some.


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