Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Another pivot bolt shearing.  (Read 4484 times)

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  • Offline Traxx

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    Offline Traxx

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    Another pivot bolt shearing.
    on: Jul 06, 2019, 11.43 pm
    Jul 06, 2019, 11.43 pm
    Bike took a nap today during a Moto class. Looks like the bolt sheared and I got to try out my AMA road side assistance. Have one on order and should be here on Wednesday.
    So, any tips on getting the old one out?
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  • Online Coconut   gb

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    Re: Another pivot bolt shearing.
    Reply #1 on: Jul 07, 2019, 08.48 am
    Jul 07, 2019, 08.48 am
    The metal of the Pivot bolt is quite soft and will drill easily, for trying an "Easy Out" /Screw extractor
    type of tool, but the threads have a type of "Loctite" compound applied to them making it quite "tight".

    I would entrust the work to a reputable engineering shop.

    Forum Member 1675 ( UK ) made a Jig to accurately drill the centre of the broken part out,
    reducing the risk of a drill bit wandering off and damaging the threaed hole which would then need to
    drilled out oveesize to accept a helicoil insert. 

    He has offered to lend the Jig to any Forum Member, but there would obviously be
    the Interantional shipping costs and time to be taken into consideration.

    See here :

    Guide for gear lever strip down ?

    Cheers  :821:

    Last Edit: Jan 07, 2020, 08.17 pm by Coconut

  • Offline Traxx

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    Offline Traxx

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    Re: Another pivot bolt shearing.
    Reply #2 on: Jul 07, 2019, 12.34 pm
    Jul 07, 2019, 12.34 pm
    Locktite then? I wonder if I hit it up with the heat gun maybe that will help the locktite release.
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    Offline Rick505

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    Re: Another pivot bolt shearing.
    Reply #3 on: Jul 07, 2019, 02.22 pm
    Jul 07, 2019, 02.22 pm
    *Originally Posted by Traxx [+]
    Locktite then? I wonder if I hit it up with the heat gun maybe that will help the locktite release.
    You can also apply a soldering gun to the remaining bolt to heat up the thread-locker a bit if you find removal difficult.  I'd also look at other threads about drilling out the remaining part and insert a 8mm bolt through.  Better explained, with pictures, in the other thread.  I proactively did both my shifter and brake levers.

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    Re: Another pivot bolt shearing.
    Reply #4 on: Jul 07, 2019, 05.26 pm
    Jul 07, 2019, 05.26 pm
    I think that drilling it through may be the best bet.
    My eazy out did not work. All it did was take away most of the meat of the bolt I stopped when It got to the threads.
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    Re: Another pivot bolt shearing.
    Reply #5 on: Jul 07, 2019, 11.48 pm
    Jul 07, 2019, 11.48 pm
    Is it the one that has a through bolt, or the one with the blind hole.  Hope it's not the blind one, whole different set of circumstances to drill and tap/clean up a blind one.  Careful consideration of the tap issue too, don't run a threading tap in an already threaded part intending that it will "clean it up", that may do more damage than good, but maybe you already know that.
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    Re: Another pivot bolt shearing.
    Reply #6 on: Jul 08, 2019, 02.50 am
    Jul 08, 2019, 02.50 am
    Itís the blind hole. I will be in Houston all week, so I will not be able to get to it soon.
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    Offline LarryJa

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    Re: Another pivot bolt shearing.
    Reply #7 on: Jul 08, 2019, 12.53 pm
    Jul 08, 2019, 12.53 pm
    If you heat up the remaining bolts, up to approx. 200F, it'll soften the loctite. Then, your ez out, or a left handed drill, will pull out the remaining threaded piece.
    Just be careful to localize the heating.
    A good man once told me, "Don't sell your bike. It's your soul."....