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  1. #1
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    Dura Ace 9000 crank safety plate?

    Can anyone link me to an actual website to buy the safety plate (the washer that goes between the pinch bolts on the NDS crank arm)?

    I ordered the one below and it does not fit

    https://www.amazon.com/SHIMANO-Hollo.../dp/B003RLNCS6

  2. #2
    'brifter' is a lame word.
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    Here's the Shimano part #:

    Y1N298100

    Don't know if it works on any other cranks, I'd think it would work on Ultegra for sure, but that's the one from the EV (exploded view) of the FC-9000. That should get you going in the right direction.

    Manuals & Technical Documents is a great resource when looking for parts like this. There are exploded views, user manuals, dealer manuals, and service instructions.
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  3. #3
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    Everywhere I've searched that part number shows a list of compatible cranks and none say Dura Ace 9000.

  4. #4
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    Quote Originally Posted by thisisthebeave View Post
    Everywhere I've searched that part number shows a list of compatible cranks and none say Dura Ace 9000.
    You read my post, right? That # come directly from the EV of the 9000 crank. I suppose Shimano could have put the wrong part # on that document...
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  5. #5
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    Quote Originally Posted by thisisthebeave View Post

    I ordered the one below and it does not fit

    https://www.amazon.com/SHIMANO-Hollo.../dp/B003RLNCS6
    What doesn't fit about it? I thought all the Hollowtech crank arms were interchangeable including the installation parts like the safety pin and the NDS cap bolt.
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  6. #6
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    I hope you're doing something wrong because I actually ordered that exact same one last night for my 9000.

    What about it doesn't fit? Seems pretty basic and I would think would fit across all Shimano Hollowtech.

    Sent from my SM-G960U using Tapatalk

  7. #7
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    Quote Originally Posted by Srode View Post
    What doesn't fit about it? I thought all the Hollowtech crank arms were interchangeable including the installation parts like the safety pin and the NDS cap bolt.
    The cap bolts come in 3 or 4 different sizes. You'd think they'd all be the same, I can't think of any reason they shouldn't be the same, but there are different part #'s for sure.
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    Quote Originally Posted by cxwrench View Post
    The cap bolts come in 3 or 4 different sizes. You'd think they'd all be the same, I can't think of any reason they shouldn't be the same, but there are different part #'s for sure.
    Well, I guess I never thought about that - I've just moved NDS arms from one crank to another without a problem - though admittedly I haven't exhausted all the various options moving them around!
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  9. #9
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    So two questions:

    1. Where do I get the correct 9000 ones?

    2. What do they really do? Are they really a safety catch if the bolts come loose or are they a go/no go guage to ensure crank arm depth before torquing them down?

    Sent from my SM-G960U using Tapatalk

  10. #10
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    Quote Originally Posted by 73Bronco View Post
    So two questions:

    1. Where do I get the correct 9000 ones?

    2. What do they really do? Are they really a safety catch if the bolts come loose or are they a go/no go guage to ensure crank arm depth before torquing them down?

    Sent from my SM-G960U using Tapatalk
    Yes...sort of. I doubt they'd keep a loose arm from falling off. They do a good job of letting you know that the arm is on far enough. The cap bolt and the pinch bolts back each other up when tightened but that safety catch wouldn't do much if the pinch bolts were loose. I've seen a few arms come off despite having it.
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  11. #11
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    Quote Originally Posted by 73Bronco View Post
    I hope you're doing something wrong because I actually ordered that exact same one last night for my 9000.

    What about it doesn't fit? Seems pretty basic and I would think would fit across all Shimano Hollowtech.

    Sent from my SM-G960U using Tapatalk
    In both orientations, the second screw doesn’t line up with the slot. I put the first screw in the hole, but the second screw doesn’t line up with the slot.

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    I seem to remember that Shimano added the safety plate after the 7800 series cranks came out. It seems that the left crank arm would come off if not properly installed. Their was a pic of Benoit Joachim on US Postal standing on the side of the road with a left crank arm and a puzzled expression. Googled but can't find it.

  13. #13
    wim
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    That safety plate (aka stopper plate) is designed to be pushed down over an already installed but not yet tightened pinch bolt. If you took the outer (furthest away from the bottom bracket bearing) pinch bolt completely out, thread it back into the crank before you push down the safety plate.

    The plate really is only a last-ditch safety catch to keep the crank from coming completely off if the pinch bolts loosen and the bearing preload cap unthreads itself. As steelbikerider said, it was an add-on fix made shortly after the 7800 cranks came out.
    Last edited by wim; 1 Week Ago at 02:56 PM.

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