MTB Workshop & Tech Forum

xt bottom bracket

  		View previous topic :: View next topic  
Post new topic   Reply to topic    BikeRadar Forum Index > Mountain bike > MTB Workshop & Tech
Author Message
little wiser
Joined: 29 Oct 2008
Posts: 311
PostPosted Sun Nov 8, 2009 12:07 amReply with quote    
hi brought a specialized pitch pro with xt cranks and bb anyway im stripping and greasing everything and when i took bb cups off to inspect there are no spacers?,and can i clean and grease the bearings?
Send private message
nicklouseLives Here
Joined: 20 Mar 2003
Posts: 48093
Location: A Yorkshire man in Sweden
PostPosted Sun Nov 8, 2009 12:11 amReply with quote    
yes and the BB width is? and the mech is a ?

they advise you not to but the seals can be lifted with care.

"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools Question SheldonBrown
Send private message Send e-mail Visit poster's website
little wiser
Joined: 29 Oct 2008
Posts: 311
PostPosted Sun Nov 8, 2009 12:18 amReply with quote    
not sure on bb width can measure in morning its what ever pitch bb are? , cannot seem to find the size on net and the mech bolts to a bracket that bolts to the frame hope that makes sense only used to seeing clamp on ones or braze on.
Cheers.
Send private message
nicklouseLives Here
Joined: 20 Mar 2003
Posts: 48093
Location: A Yorkshire man in Sweden
PostPosted Sun Nov 8, 2009 12:20 amReply with quote    
so a 73mm BB shell and an E type mech would mean no spacers.

"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools Question SheldonBrown
Send private message Send e-mail Visit poster's website
little wiser
Joined: 29 Oct 2008
Posts: 311
PostPosted Sun Nov 8, 2009 12:22 amReply with quote    
thanks how hard to lift seals or better to leave alone and wait until new bottom bracket needed?
Send private message
nicklouseLives Here
Joined: 20 Mar 2003
Posts: 48093
Location: A Yorkshire man in Sweden
PostPosted Sun Nov 8, 2009 12:28 amReply with quote    
no idea not got any shimano ones and not needed to do any others.

"Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools Question SheldonBrown
Send private message Send e-mail Visit poster's website
HandjobDan
Joined: 30 Nov 2008
Posts: 400
PostPosted Sun Nov 8, 2009 1:29 pmReply with quote    
the seals are not designed to be lifted, says clearly on the top not for dissasembly. I took one apart that I didn't need and it became notchy afterwards. If it's working just leave it and wiat for it to die then buy a Hope one Wink

Santa Cruz Blur 4X, Inbred
Send private message
Northwind
Joined: 06 Sep 2008
Posts: 4507
Location: Edinburgh
PostPosted Sun Nov 8, 2009 4:23 pmReply with quote    
You can certainly lift and replace the seals, and if you do it right the bearing will work the same when you replace it. But, I reckon if it's not running well it's probably past recovery anyway. The "do not remove" label means nothing, except "We'd like you to buy a new BB"

You can fit replacement bearings to XT BBs apparently... Never done it myself. It doesn't work out an awful lot cheaper than a new BB, and XT bearings are pretty good to start with.

We still do it because we're forever chasing what we've already found
Send private message
mmacavity
Joined: 08 Sep 2009
Posts: 33
PostPosted Tue Nov 10, 2009 9:15 amReply with quote    
Northwind wrote:
You can certainly lift and replace the seals, and if you do it right the bearing will work the same when you replace it. But, I reckon if it's not running well it's probably past recovery anyway.

You can fit replacement bearings to XT BBs apparently... Never done it myself. It doesn't work out an awful lot cheaper than a new BB, and XT bearings are pretty good to start with.


http://www.enduroforkseals.com/sitebuildercontent/sitebuilderfiles/hollowtech2a.pdf
Send private message
stumpyjon
Joined: 20 Oct 2007
Posts: 2832
Location: East Lancs
PostPosted Wed Nov 11, 2009 8:06 pmReply with quote    
HandjobDan wrote:
the seals are not designed to be lifted, says clearly on the top not for dissasembly. I took one apart that I didn't need and it became notchy afterwards. If it's working just leave it and wiat for it to die then buy a Hope one Wink


That's what I've just done. Nice blingy red one.

It's easier to ask for forgiveness than for permission.

I've bought a new bike....ouch - result
Can I buy a new bike?...No - no result
Send private message
undapressure
Joined: 11 Jun 2009
Posts: 26
PostPosted Wed Nov 11, 2009 8:33 pmReply with quote    
I followed this guide to servicing a bottom bracket but gives you a good guid of how to take it apart, its really really easy. Takes about 10mins per side and bottom bracket runs really smoothly afterwards - http://www.socaltrailriders.org/forum/workshop/39938-chris-king-bottom-brackets-anyone-2.html
Send private message
Dagowly83
Joined: 14 Oct 2009
Posts: 24
Location: Akrotiri, Cyprus
PostPosted Thu Nov 12, 2009 12:23 pmReply with quote    
If you're worried about greasing the bearings, just replace them from any good bearing company. They're only a couple of £ each.

2010 Specialized FSR XC Pro - Why the hell in white?!

Send private message
mmacavity
Joined: 08 Sep 2009
Posts: 33
PostPosted Sat Nov 14, 2009 11:10 amReply with quote    
little wiser wrote:
hi brought a specialized pitch pro with xt cranks and bb anyway im stripping and greasing everything and when i took bb cups off to inspect there are no spacers?,and can i clean and grease the bearings?



http://www.youtube.com/watch?v=UAqAanDsAKA
Send private message
Display posts from previous:   
Post new topic   Reply to topic    BikeRadar Forum Index > Mountain bike > MTB Workshop & Tech All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
BikeRadar topic RSS feed 



Powered by phpBB © 2001, 2005 phpBB Group