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  1. #1
    don't try this at home
    Reputation: moschika's Avatar
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    removing lower pivot, how?

    how do i remove the lower pivot bolt from the main triangle? the one just above the bb. when I loosen the screw on one side, the whole thing just spins in place. i'm trying to take the rear triangle off. I've gotten the rockers off the fram, but can't figure out how to release the rear from the front at that lower pivot.

    thanks.
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  2. #2
    The Bubble Wrap Hysteria
    Reputation: mtnbiker4life's Avatar
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    Quote Originally Posted by moschika View Post
    how do i remove the lower pivot bolt from the main triangle? the one just above the bb. when I loosen the screw on one side, the whole thing just spins in place. i'm trying to take the rear triangle off. I've gotten the rockers off the fram, but can't figure out how to release the rear from the front at that lower pivot.

    thanks.
    What year is your frame? If it's 2012 you really have no business removing since it's servicable from the zerk. If it's not, then remove the bolt and tap it out...pretty simple with the correct tools

  3. #3
    post-ride specialist
    Reputation: icegeek's Avatar
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    pull the drive-side crank to get to the bolt head behind the chainrings
    Since when did Need have anything to do with this?

  4. #4
    don't try this at home
    Reputation: moschika's Avatar
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    well, i'll just take it into the shop. i probably don't have the correct tools. it doesn't really look like i can "tap it out". this most likely means i don't know what i'm doing and will take it in. it's not a ventana frame, but a custom steel front with a ventana rear.
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  5. #5
    Ultra Ventanaphile
    Reputation: Ciclistagonzo's Avatar
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    Quote Originally Posted by moschika View Post
    well, i'll just take it into the shop. i probably don't have the correct tools. it doesn't really look like i can "tap it out". this most likely means i don't know what i'm doing and will take it in. it's not a ventana frame, but a custom steel front with a ventana rear.
    Mos, don't give up, and ignore, senior Mtbr4life's rather rudeness, he's an engineer, he can't help it!

    The main pivot is either a thru shaft with a threaded end cap, or Two Shafts (same size) that are squeezed together by a bolt, depending on how old your frame is.

    In either case, you need complete access to the both sides, (ala Icegeeks comment about removing the crank). I believe the button head bolt it a 5mm, and the oppositte side is an 8mm. Insert the proper size allens into each side. Turn the Button head bolt to loosen and use the larger size allen to keep the pivot from rotating. Once you remove the bottom head, it can take a light tapping with a plastic hammer, to get the pivot to slide out of the bearing races.


    Here's what the newer one looks like, outside of the frame.
    -Aaron G.

    "Before D.W., "anti-squat" was referred to as pedal feedback."

  6. #6
    mtbr member
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    One trick I generally use is to unthread the bolt just half-way, and then tap directly on the bolt to remove the pivot axle on the other side. That way, I don't risk damaging the axle by hitting it directly.

  7. #7
    don't try this at home
    Reputation: moschika's Avatar
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    Quote Originally Posted by albeant View Post
    One trick I generally use is to unthread the bolt just half-way, and then tap directly on the bolt to remove the pivot axle on the other side. That way, I don't risk damaging the axle by hitting it directly.
    This is more or less what we did. The pivot axel was seized, so it didn't quite slide out. Ended up taking the bearings out with it. No problem since thy needed to be replaced as the inner ones were a bit crunchy. It's all gonna be good now.
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  8. #8
    Proud lame eBiker
    Reputation: Internal14's Avatar
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    Quote Originally Posted by moschika View Post
    This is more or less what we did. The pivot axel was seized, so it didn't quite slide out. Ended up taking the bearings out with it. No problem since thy needed to be replaced as the inner ones were a bit crunchy. It's all gonna be good now.
    Yeah, unless you're real on top of your bearing replacements and axle greasing by the time you get around to replacing bearings the one on the drive side of the main bearing axle seizes on there. And the result is always the same, knock it out with the axle, knock bearing off in vice. Good to go.
    www.velocitybicycles.comWhere customers become friends, not simply a dollar sign.

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