RoadBikeReview.com's Forum Archives - Components


Archive Home >> Components(1 2 3 4 5 6 7 8 9 10 )


Help- Campy Chorus BB binds when torked to spec...(12 posts)

Help- Campy Chorus BB binds when torked to spec...pappy_d
Aug 23, 2003 7:18 AM
I have a C'dale CAAD 5 frame into which I am trying to install a brandnew Campy Chorus BB. The instructions suggest 51.63 lb/ft, but the axel binds long befor I reach that. The instructions suggest backing off to 22 lb/ft if it does bind, but the BB still seems a little snug-
Previously I had a Shimano600 BB that spun like butter, cranks would spin freely with the flick of a finger, the new campy setup definiely has some drag. Why would one work so smoothly in this frame and the other bind?

Suggestions?- does the BB just need to break in (doesn't seem right) What might I be doing wrong?
(It has nothing to do with English vs Italian threading)
re: Help- Campy Chorus BB binds when torked to spec...Rusty Coggs
Aug 23, 2003 7:38 AM
If the BB shell has not been faced,one BB my be more sensitive than another to a slight mis alignment when torqued.
re: Help- Campy Chorus BB binds when torked to spec...flakey
Aug 23, 2003 7:47 AM
Check to see if the aluminum ring/seal holder that sits inside the drive side cup is not in backwards. That piece does have a recess that fits around the bearing circlip and if it its in backwards it may be causing things to bind.
Perfect fix... Thanks Flakey, the ring/seal was backwards (nm)pappy_d
Aug 25, 2003 10:58 AM
re: Help- Campy Chorus BB binds when torked to spec...divve
Aug 23, 2003 8:25 AM
Cannondale frames come properly faced and chased from the factory. Try what flakey suggested and if that doesn't work try another BB.
The BB should rotate with a slight drag when turning it directly with your finger tips, but not bind or feel rough. There's no point in riding it this way and hoping for it to brake-in. The only thing you'll achieve is premature wear.

If after testing the above you find that the frame is at fault chasing and facing the BB shell again might help, otherwise you'll have to send it to Cannondale for a warranty replacement.
BB faced, but painted?...C-40
Aug 23, 2003 10:11 AM
Even properly faced BBs are usually painted from the factory. Carefully scrape the paint from the from the face of the right side, prior to installing the BB. This could help.

Also compare see how stiffly the spindle spins prior to torqueing. New bearing seals often have a fair amount of initial resistance, that will soon disappear.
They do it after painting nm.divve
Aug 23, 2003 11:19 AM
Really?...How?...nmRusty Coggs
Aug 23, 2003 12:07 PM
nm
Really?...How?divve
Aug 23, 2003 1:00 PM
What do you mean how? Doesn't a shop do it as well after painting? The initial threads however are cut before painting if that's what you meant.
OK...sorryRusty Coggs
Aug 23, 2003 2:15 PM
Certainly one can be done by a shop after a frame has been painted and left the factory. But if suggested as in the case of the Cdale already beng faced before paintng,then one only has to remove the paint.
You have a bad bottom bracket.Leroy
Aug 24, 2003 5:41 AM
Get another - preferalby Phil Wood.
Very interesting....Atombomber
Aug 24, 2003 9:49 AM
I got the impression from the Campy fanatics that Campagnolo NEVER wore out and ALWAYS operated perfectly. Seems not to be the case.