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  1. #1
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    Calling all IGH/Alfine gurus! Problem with my Internal hub

    I just successfully converted my drivetrain to a Shimano Alfine hub.

    Since installing it's never been truly golden; there've been some late shifts, grinding gears, etc. Part of this could be my fault as I was a newbie at installing so I think I lined up the yellow dots in gear 5 instead of gear 4 and my shifting cable sticks a little.

    Anyway, I was riding in some snowy conditions yesterday and pedaling up a hill, I lost all gearing except what felt like 2nd gear. I was pedaling hard. When I got home, I noticed a component had failed in keeping the shifting cable in tension so I stripped the parts off and re-situated them. But there's another problem...

    I noticed a rubber gasket of some sort had been shredded. It's from an inner portion of the gearing (just past the first stop washer working from the right/drive side). But I don't know if it's just a dust cover or something more important. I removed the torn bits and put everything back together and it seems to move fine (haven't tried shifting yet). I just need to know any expert opinion's on what that rubber gasket was.

    Is the driver plate rubber? I can't take off the lock nut and stop washer to see better because I don't have cone wrenches. (I know, I know, I'm a poor excuse for a biker) From what I can tell, it may just be the right dust cover B, but I didn't know if anyone who'd stripped the alfine could tell better.

    Any ideas out there? Thanks in advance.

    TL;DR My alfine dropped it's gears, I put it back together but noticed a ripped inner rubber gasket. Is it necessary/what is it?

  2. #2
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    Take it to the LBS before you ruin it completely.

  3. #3
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    Quote Originally Posted by 3v1lD4v3 View Post
    Take it to the LBS before you ruin it completely.
    Thanks for the vote of confidence, but I don't have a LBS. Shocking I know.

  4. #4
    coprolite fietsbob's Avatar
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    Hubstripping, http://hubstripping.wordpress.com/Is a blog where IG hub people discus more ,
    maybe specific topic can be covered or raised , there.

    only have 2.. neither an Allfine, Sturmey UK, and Rohloff D.
    Last edited by fietsbob; 01-13-11 at 12:55 PM.

  5. #5
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    Thanks for the link. From what I gather, it's probably the seal on the right hand cone w/ seal part. I'll investigate further.

  6. #6
    Senior Member Cross Creek's Avatar
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    Nexus/Alfine hubs and shifters are indexed, but not an even amount of cable pull per gear (I gather this from running a Nexus 7 for quite a while with a friction shifter--my shifts weren't evenly spaced). I don't think you can line up in 5th and just be off by one gear. Some gears may be close enough to work, but others will be off enough to not mesh properly and could damage your expensive hub. This is one reason the JTek shifter that works so well for these hubs is so pricey. If you think you lined up on 5th gear, start over and make sure it's in 4th.

    The Shimano site has pdf's of hub "exploded" drawings which should help you identify your torn up part. Sorry, I don't have the link handy, but it's easy to Google.
    CC

  7. #7
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    Well here's hoping I didn't screw it up too much. But yeah, I saw conflicting discussions of putting on 5th or 4th to line up the dots. I think it was 5th on a Youtube video I saw so I just followed along. I found the exploded diagram.

    Thanks for the help.

  8. #8
    Senior member Dan Burkhart's Avatar
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    I think the shredded rubber part is the driver cap, #33 on this document. http://www.ridesaint.com/media/techd...9830689515.pdf It is not a vital part, but if it is torn up, it should be removed as it could interfere with the functioning of the cassette joint.
    Sticking cable is a problem, as it needs to return freely to downshift. Upshifting usually is not a problem as the shifter is pulling the cable.
    I sold several Nexus and Alfine equipped bike models, and shifting problems almost always related to cable issues.
    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  9. #9
    Senior member Dan Burkhart's Avatar
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    Quote Originally Posted by thorasaurus View Post
    Well here's hoping I didn't screw it up too much. But yeah, I saw conflicting discussions of putting on 5th or 4th to line up the dots. I think it was 5th on a Youtube video I saw so I just followed along. I found the exploded diagram.

    Thanks for the help.
    Nope. Alignment marks must line up in 4th.
    Gearhubs demystified and other cool stuff.


    Rule #12: The correct number of bikes to own is n+1

  10. #10
    slow as I ever was Ex Pres's Avatar
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    Quote Originally Posted by thorasaurus View Post
    ...I know, I know, I'm a poor excuse for a biker....
    We're cyclists

    Bikers ride motorbikes
    72 special CNC ___________ 72 Frejus (ala Legnano) __73 Holdsworth Record
    78 Raleigh Professional_____ 80 Ranson_____________ 80 unknown French (SS)
    82 Peugeot PXN10_________83 Trek 620 (nee 600)____ 85 Gianni Motta
    85 Trek 560______________88 Guerciotti GLX
    90 Miele Gara_____________02 Casati Dardo (g/blue)__02 Casati Dardo (y/blk)
    03 Casati Dardo___________08 BF IRO (fixed)________10 Vassago Fisticuff (IGH)

  11. #11
    Senior Member Cross Creek's Avatar
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    Bikers ride motorcycles! Which reminds me of the old conundrum: why is stuff sent by truck called a shipment and stuff sent by ship called cargo?
    CC

  12. #12
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    Things should be dispatched, like in Britain. That's why I enjoy shopping Amazon.co.uk. You put things in a basket (not cart) and then they are dispatched (not shipped).

    Anyway, I've narrowed it down to the driver cap or the seal on the right hand drive cone. Neither is terribly important to my knowledge as long as I keep it clean.

    I haven't put it back on the bike yet, but the hub still seems to turn fine.

    As for other updates, since the wheel was bought pre-owned, I've decided to do an ATF oil bath this weekend. I also bought the trigger shifter (assuming I can convince it to fit on my bullhorns since it's 1.6mm too small...) since it's rumored to be more precise in shifting.

    The issues were probably compounded by the fact that I started riding in winter. Here she is, the morning of the mishap.

    IMG_20110111_075137.jpg
    Last edited by thorasaurus; 01-14-11 at 11:35 AM.

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