Dura-Ace Octalink BB replacement cone ?

BG2000

My 7 year old Dura Ace BB is feeling a bit rough, so I decided to remove it the other day. To my surprise, it's not a cartridge unit, and all the cups, bearings and cones are separate.

The cause of roughness is that the drive side cone is pitted. Unlike a normal BB axle where the 'cone' is essentially a lip in the axle, with the BB-7700 unit the cone is a loose ring that sits again a lip in the axle.

Does this mean I can replace the cones ? I'll be damned if I can find them anywhere.

DaSy

Part no. appears to be Y-1TG 07000 and are available from a few online retailers -

http://www.onyourbike.co.uk/parts/bottom-bracket/bottom-bracket-spares/shimano-spares-bb-7700-cone-1tg-0700.

Appears to be around £15 each from the limited info they show

Here's Shimano's part diagram with PN's

http://techdocs.shimano.com/media/techdocs/content/cycle/EV/bikecomponents/BB/EV-BB-7700-1657B_v1_m56577569830610606.pdf

BG2000

Thanks very much for that...pricey though. I just got an unused 5600 cartridge unit for £15 off eBay recently - I'll see if I can find the cones cheaper, otherwise I may as well bin the 7700.

moonshine

Petra Cycles are good for shimano spares, though the delivery can sometimes be slow if they fon't have them in stock.
http://www.petracycles.co.uk/bb7700-cone-p-5584.html