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Old 01-08-04, 09:32 AM   #1
Bobdohm31
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1993 Campy Chorus Hubs:question

I have a 1993 Campy Chorus groupo. Before that it was a Shimano 600 groupo. One of the things I noticed onthe Campy stuff was that the hubs have a small hole in the center to add grease. That's fine. But everytime I add grease(usually Pedro's stuff) it just seems to leak out of the side of the hubs. Also, when I grease the rear hub it totally silences the clicking noise as you coast. It's not a problem to me but I wanted to know if the lack of clicking is undesirable machanically.
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Old 01-08-04, 08:30 PM   #2
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That grease has to go some where
The reason the clicking quits is the grease you just put in the rear hub is filling the spaces between the ratchets and the ramps and acting as a damper to cushion the movement of the ratchets. When you start riding it gets pushed around and out of the way and the clicking gets louder again. It doesn't hurt anything.
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Old 01-09-04, 08:04 AM   #3
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So if I understand right these hubs are not sealled and thus the grease is gonna just keep coming out? If so the next question is can I have a pair of wheels built using a sealed bearing hub and still have it compatable with this 8 speed group? .
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Old 01-09-04, 08:51 AM   #4
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They do have seals, but they are just rubber. If you squirt enough grease in the hub, it will push past the seal. Just wipe it off. The problem comes when dirt or water goes past the seal into the hub, unlikely as the seals are tight enough to stop this. Most branded hubs use rubber seals or labryinth seals(This type of seal has two pieces one fixed to the hub one to the axle and they fit into one another) or a combination of the two.
You may be thinking of a cartridge bearing hub, like a Hugi or Chris King. These are sealed but not as easy to service as your Chorus hubs, no grease fitting. You have to pop out the grease seal and flush the old grease out with solvent and then regrease. If you pack a lot of grease in these bearings they will weep some out as well.

You should be able to find someone making a cartridge bearing hub to fit your Campy group, but I can't think of one offhand.
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Old 01-09-04, 08:57 AM   #5
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Quote:
Originally Posted by Rev.Chuck
You may be thinking of a cartridge bearing hub, like a Hugi or Chris King. These are sealed but not as easy to service as your Chorus hubs, no grease fitting. You have to pop out the grease seal and flush the old grease out with solvent and then regrease. If you pack a lot of grease in these bearings they will weep some out as well.
Cartridge bearings may or may not be servicable. They are typically just replaced.
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Old 01-09-04, 10:42 AM   #6
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I couldn't find anything to fit a Campy 8 speed. The splines on a 9/10 hub are different. On my Spinergys, I bought a Shimano compatible hub, a SRAM road cassette and a Wheels Mfg. respacing kit. Works like a charm. On the Chorus hub, there is nothing wrong with the grease weeping out. The dirty stuff needs someplace to go when you fill it with fresh grease. My guess is that the seals are a little less flexible than they were a decade ago, and aren't holding the grease in as well as they used to. It may be possible to get replacemant seals. I would email Sheldon Brown at Harris Cyclery, Tim at Branford Bike, or Bicycle Classics for older Campy stuff.
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Old 01-09-04, 10:53 AM   #7
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Tim at Branford is the place to go. They seem to be
the only shop that has replacement parts for older
campy ergo (8 speed).

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Old 01-09-04, 11:55 AM   #8
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If your hubs are full of grease, there is no place for dirt or water to go, even if the seal is not 100%.
The grease which you force out is contaminated with flakes of metal from the ball bearings. On a grease injection system, you can flush them out. On any other system, they just hang around degrading your lube.
If your hubs spin OK, keep them. The lube system is good, and the quality is hard to beat.
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