Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-13-11, 08:31 AM   #1
thorasaurus
Junior Member
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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?
thorasaurus is offline   Reply With Quote
Old 01-13-11, 09:46 AM   #2
3v1lD4v3
Senior Member
 
Join Date: Jul 2009
Bikes:
Posts: 90
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Take it to the LBS before you ruin it completely.
3v1lD4v3 is offline   Reply With Quote
Old 01-13-11, 10:59 AM   #3
thorasaurus
Junior Member
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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.
thorasaurus is offline   Reply With Quote
Old 01-13-11, 11:24 AM   #4
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 20,415
Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 653 Post(s)
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 01:55 PM.
fietsbob is online now   Reply With Quote
Old 01-13-11, 11:42 AM   #5
thorasaurus
Junior Member
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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.
thorasaurus is offline   Reply With Quote
Old 01-13-11, 12:05 PM   #6
Cross Creek
Senior Member
 
Cross Creek's Avatar
 
Join Date: Nov 2009
Location: Fayetteville, NC
Bikes: 2013 Rivendell Sam, 1996 Bianchi Milano, 1994 Trek 820
Posts: 314
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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
Cross Creek is offline   Reply With Quote
Old 01-13-11, 02:38 PM   #7
thorasaurus
Junior Member
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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.
thorasaurus is offline   Reply With Quote
Old 01-13-11, 02:38 PM   #8
Dan Burkhart 
Senior member
 
Dan Burkhart's Avatar
 
Join Date: Oct 2004
Location: Oakville Ontario
Bikes:
Posts: 5,982
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 33 Post(s)
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.
Dan Burkhart is offline   Reply With Quote
Old 01-13-11, 02:39 PM   #9
Dan Burkhart 
Senior member
 
Dan Burkhart's Avatar
 
Join Date: Oct 2004
Location: Oakville Ontario
Bikes:
Posts: 5,982
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 33 Post(s)
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.
Dan Burkhart is offline   Reply With Quote
Old 01-13-11, 07:36 PM   #10
Ex Pres
#39
 
Ex Pres's Avatar
 
Join Date: Dec 2007
Location: the 35223 (AL)
Bikes:
Posts: 6,280
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 23 Post(s)
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
Ex Pres is offline   Reply With Quote
Old 01-14-11, 11:00 AM   #11
Cross Creek
Senior Member
 
Cross Creek's Avatar
 
Join Date: Nov 2009
Location: Fayetteville, NC
Bikes: 2013 Rivendell Sam, 1996 Bianchi Milano, 1994 Trek 820
Posts: 314
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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
Cross Creek is offline   Reply With Quote
Old 01-14-11, 12:00 PM   #12
thorasaurus
Junior Member
Thread Starter
 
Join Date: Aug 2009
Bikes:
Posts: 9
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
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.

Attached Images
File Type: jpg IMG_20110111_075137.jpg (95.6 KB, 5 views)

Last edited by thorasaurus; 01-14-11 at 12:35 PM.
thorasaurus is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 05:01 PM.