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PostPosted: Mon May 21, 2012 2:58 am 
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Hey experts. I'm hoping someone can advise me.

I noticed some play in the BB on my Trek Cronus CX. Removed the cranks on NDS bearing but I can't remove the DS bearing. Even with the appropriate Park Tool there is not enough room behind the bearing for the bushing to sit and hit against because of a plastic sleeve which runs between the two bearings. I tried to slide the sleeve to the side but it won't budge.

Any suggestions? If necessary I can take a photo, but I figured some people here may have more experience with BB90 than I do.

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PostPosted: Mon May 21, 2012 6:05 am 
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BFH...

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Posted: Mon May 21, 2012 6:05 am 


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PostPosted: Mon May 21, 2012 1:00 pm 
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Location: Australia
I used a headset remover to bash mine out.
It's not easy to do without damaging the bearing.

You could also try using an ice pack on the bearing to shrink it a little. :noidea:

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PostPosted: Mon May 21, 2012 3:23 pm 
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2002SaecoReplica wrote:
BFH...


Big f...n hammer??

Sounds like I need to stop being so gentle

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PostPosted: Mon May 21, 2012 7:42 pm 
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Try using a compressed air can upside down to spray on a little liquid CO2 directly unto the stuck part. The cold will cause shrinkage and bashing it out will be easier. I had a b*tch of a time getting out my cups until I did that. OH yeah, I used a bigger FH as well!


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PostPosted: Mon May 21, 2012 8:16 pm 
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An internal bearing puller is the way to go - http://www.enduroforkseals.com/id197.html
Far less chance of damaging the frame/bearing seat.

To be honest, 50% of the BB90 treks we see have at least one bearing that falls out the frame with little or no effort.


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PostPosted: Mon May 21, 2012 9:28 pm 
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pawnii: So slim head remover?

I used the proper Park Tool tool last week, wasn't any problems on a Scott Addict so shouldn't be on a Trek what I've seen last time working on one.

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Posted: Mon May 21, 2012 9:28 pm 


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PostPosted: Mon May 21, 2012 11:24 pm 
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Thanks for the replies people. In the end I used the hammer and socket extension to whack that bearing out. Did it without damaging it, but doesn't really matter as the bearing is done anyway.

I love buying tools, but it also seems ridiculous at times what we need to spend on something we may only use once/year, which will be obsolete in two years when the newest standard comes out. Maybe I'm just still bitter about my 10s Campy chain tool :evil:

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