Drum brake questions

Discussion in 'Motorbike Technical Discussion' started by Rob Kleinschmidt, Jul 8, 2004.

  1. What is the effect on braking and general safety when a drum approaches
    its wear limit ?

    Has anybody ever tried rehabilitating a worn drum by having it
    built up with weld then machined to dimension again ?

    Is this a reasonable and cost effective thing to try or is it unwise
    to even consider it ?


    Rob Kleinschmidt
    Rob Kleinschmidt, Jul 8, 2004
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  2. not a brake drum expert but used to weld for a living...i would guess
    that the intense heat from the welding needed to build up the surface
    would make the metal too brittle and prone to cracking....but i will
    let the ones that are more knowledgable answer for certain..
    Joey Tribiani, Jul 8, 2004
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  3. Not a lot on braking efficiency. But once it's on the limit, the safety
    issue becomes huge.
    Not a good idea.
    No and yes.
    The Older Gentleman, Jul 8, 2004
  4. Rob Kleinschmidt

    Charlie Gary Guest

    Nobody's mentioned what happens when the little actuator cam rotates far
    enough to get wedged. My buddy tells me it locked his back wheel until he
    was able to get off and un-stick it by hand. He's a firm believer in
    keeping drum brakes within spec, and I myself believe in learning from the
    mistakes of others. I'm cheap like that. :)

    I would think a better way would be to heat the wheel hot enough to get the
    old liner out and drop a new one in, but by the time you factor in what it
    would take to gather up the equipment to do it right and add in the risk
    factor of getting it right the first time you try it by yourself, I would
    think a used wheel with low miles would be the way to go.
    Charlie Gary, Jul 8, 2004
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