BB86 bearing maintenance and fitting

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Peter Salt

Bittersweet
Location
Yorkshire, UK
Just removed a press fit 86 (SM-BB71-41) bottom bracket from one frame to go into a different one.

Gave it a good clean, removed all the covers and o-rings to inspect the bearings. They spin buttery smooth, no issues, appear to be full of original grease:

IMG_20220630_121426_2.jpg

Do I:
1. Degrease and re-grease.
2. Leave whatever grease is in and top up with a bit of new one.
3. Just leave as is.

I don't believe it's possible to remove the bearing from the fairing without damaging it?

Also, when fitting the BB into an aluminium frame, do I grease up every contact point between the BB and frame as well as different sections of the BB itself? It comes in three parts.
 

T4tomo

Legendary Member
Top up with grease, and grease the fark out of all contact points otherwise it will squeak.
 
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