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 06-12-10, 09:14 PM   #1
pstock
Senior Member
Thread Starter
 
Join Date: May 2008
Location: Toronto, Canada
Bikes: Merckx titanium with Chorus, Columbus Cyclops Campy Victory, 531 Harry Quinn 1st gen DA, SLX Fuso 8-spd DA, Airfriday. Colnago Gilco with Campy mix, Claude Pottie 753 w. 8S Record, Claude Pottie Columbus with 105, Basso with DA 7402, Masi Team 3v wit
Posts: 606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
chorus crank dust cap removal (Dust cap)

I am trying to strip a bike with Campagnolo Chorus 8-speed. (late 90s?) without the benefit of another of these DARN proprietary tools.
I am stymied by the dust ring or cap. on on side I managed to unscrew it's reverse thread. but only a bit. for the next 30 minutes I went through a stupid dance of a little bit of dust ring CW, a little bit of center bolt CCW, a little bit of dust ring CW, a little bit of bolt CCW.... until eventually every came loose and I was able to extract the crank.

the other side dust ring is more obstinate. I can't loosen it to start this CW CCW CW CCW dance.

am I missing something? is this easier than it seems? I've read something about some Campy "Self Extracting Crank" system.

should I just be leaning on the 7mm allen key and somehow the stupid dust ring will come out? I can only imagine stripping the darn thing.
pstock is offline   Reply With Quote
Old 06-12-10, 09:23 PM   #2
joejack951
Senior Member
 
joejack951's Avatar
 
Join Date: May 2004
Location: Wilmington, DE
Bikes: 1984 Trek 660, 2003 Specialized Hardrock, 2004 LOOK KG386i (RIP), 2005 Iron Horse Warrior Expert, 2009 Pedal Force CX1, 2014 Islabikes CNOC 14 (son's)
Posts: 10,366
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 289 Post(s)
It sounds like the "dust caps" are really self extracting caps that are secured to the crank bolts somehow. Backing out the crank bolt should pull the arm off the bottom bracket without any need to touch the dust cap, at least that's how at the self extracting crank bolts I've ever used have worked.
joejack951 is offline   Reply With Quote
Old 06-13-10, 09:24 AM   #3
pstock
Senior Member
Thread Starter
 
Join Date: May 2008
Location: Toronto, Canada
Bikes: Merckx titanium with Chorus, Columbus Cyclops Campy Victory, 531 Harry Quinn 1st gen DA, SLX Fuso 8-spd DA, Airfriday. Colnago Gilco with Campy mix, Claude Pottie 753 w. 8S Record, Claude Pottie Columbus with 105, Basso with DA 7402, Masi Team 3v wit
Posts: 606
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
ahhah
many thanks. I'd not used the SE system before. (whenever I have forced something, I've usually broken it so I assumed that when it got tight, I'd bust something.)

so, chain rings side is now off.
But I have managed to somehow remove and seperate the dust ring and the bolt. and I know see that I have to get them back together.

any tips on how I get the bolt back into the dust ring?
Attached Images
File Type: jpg DSCN9492.jpg (41.6 KB, 4 views)
File Type: jpg DSCN9490.jpg (44.8 KB, 2 views)
File Type: jpg DSCN9489.jpg (39.7 KB, 2 views)
pstock 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 06:52 AM.