Worn hole on main frame from rear suspension bolt. advice needed urgently!!!!- Mtbr.com
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  1. #1
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    Worn hole on main frame from rear suspension bolt. advice needed urgently!!!!

    Hi folks I've got a problem.. the equallink bolt has worn through the hole on the main frame. The bearings have not stopped it from eating away at the frame and now there is about 1mm-2mm play and it makes a slight clicking noise when i peddle from the gap! has anyone had this problem before? can it be fixed by a specialist cmc engineer or something along those lines? your help would be greatly appreciated Worn hole on main frame from rear suspension bolt. advice needed urgently!!!!-untitled6.jpgWorn hole on main frame from rear suspension bolt. advice needed urgently!!!!-untitled5.jpgWorn hole on main frame from rear suspension bolt. advice needed urgently!!!!-untitled4.jpgWorn hole on main frame from rear suspension bolt. advice needed urgently!!!!-untitled3.jpgWorn hole on main frame from rear suspension bolt. advice needed urgently!!!!-untitled2.jpgWorn hole on main frame from rear suspension bolt. advice needed urgently!!!!-untitled1.jpg

  2. #2
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    The damage appears to have been done because there wasn't enough clamping force against the bearings and main frame - loose bolt. Fill the ends of the main frame (about 1" on either side) w/ epoxy and drill new holes. Really the clamping force , bearings to main frame shoulders, should stop movement not the bolt to the frame bore.

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    thanks for the help! so if i fill it with epoxy then drill holes it will work ok? can epoxy take the punishment? i only got the bike a couple weeks ago and haven't been able use or inspect it properly. the person i got it off says he never noticed the problem and he has only owned it for 10 months so is going to contact the shop he got it from to see if its under warranty for the frame.

  4. #4
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    Quote Originally Posted by mtbuk View Post
    thanks for the help! so if i fill it with epoxy then drill holes it will work ok? can epoxy take the punishment? i only got the bike a couple weeks ago and haven't been able use or inspect it properly. the person i got it off says he never noticed the problem and he has only owned it for 10 months so is going to contact the shop he got it from to see if its under warranty for the frame.
    Using the epoxy is just an added measure to center the bolt and crutch the area. Where the bolt runs through the frame should not carry the load. The bolt, bearing races and mainframe are stationary when properly fastened.

  5. #5
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    thanks keen that information was very useful! i see what you mean if its tight then it will compress against the inner bearing and work properly. i did notice it was pretty easy to unscrew when i took it apart. i will tighten it up from now on. I've got another problem the bearing are seized in the the alloy, do you have an idea how to get them out safely without bending the alloy?

  6. #6
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    Soak them in penetrating oil. They make / sell pressing tools to properly remove / install frame bearings. I have had good luck using all thread and sockets. Just don't hammer them in or out.

  7. #7
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    thanks keen

  8. #8
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    Ive got a bearing press/extraction tool on the way Bearing Removal/Fitting Tool - Superstar Components ,and I've found a cnc engineer who can fix this type of problem by drilling a 2mm hole and replacing it with a alloy sleave which will fixed in place what do you think? he told me he has done a few for some bike shops and has had no comebacks

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