Replacing GXP BB
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teacherman



Joined: 25 Sep 2008
Posts: 93
Location: York

PostPosted: Thu Jan 01, 2009 12:33 pm    Post subject: Replacing GXP BB Reply with quote

I can't get the non-drive side crank off! The spindle is attached to the drive side so, once the bolts have been taken out, the non-drive side crank should just slide off shouldn't it?

Brute force? Am I missing something?

Any help gratefully received Very Happy

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Gunner



Joined: 15 Apr 2007
Posts: 29329
Location: Under Whitestone-Cliffe on the Lake.

PostPosted: Thu Jan 01, 2009 12:41 pm    Post subject: Reply with quote

Is there a locking collar which is operated by an Allen Key on the non-drive side, perhaps. Have a check.
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Gunner



Joined: 15 Apr 2007
Posts: 29329
Location: Under Whitestone-Cliffe on the Lake.

PostPosted: Thu Jan 01, 2009 12:44 pm    Post subject: Reply with quote

This any help to you...........

http://www.sram.com/_media/techdocs/2005_gxp-05-r5-e.pdf

Wink

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mr-marty-martin



Joined: 30 Jun 2008
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PostPosted: Thu Jan 01, 2009 12:49 pm    Post subject: Reply with quote

crank remover tool may be needed Wink
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teacherman



Joined: 25 Sep 2008
Posts: 93
Location: York

PostPosted: Thu Jan 01, 2009 12:52 pm    Post subject: Reply with quote

Not really but thanks Very Happy

The problem is simply taking the crank arm off. There's nothing else in the shell that can be holding it in as far as I can see. It's a different system from both race Face and Shimano though:roll:

BTW if you look at that link it says 16mm alan key Shocked It says it on the printed version I've got. Think it means 10mm Laughing surely.

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teacherman



Joined: 25 Sep 2008
Posts: 93
Location: York

PostPosted: Thu Jan 01, 2009 12:54 pm    Post subject: Reply with quote

mr-marty-martin wrote:
crank remover tool may be needed Wink


Dont think so on this system. I thought you only needed one for Isis and square taper Confused

I'm not much of a mechanic mind...

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teacherman



Joined: 25 Sep 2008
Posts: 93
Location: York

PostPosted: Thu Jan 01, 2009 1:46 pm    Post subject: Reply with quote

For future reference what you apparently have to do is leave the 10mm bolt in place and undo the 8mm one inside it. The bolt should be self extracting apparently Very Happy

Gonna give it a go and see if it works.

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SeanO



Joined: 17 Feb 2008
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PostPosted: Thu Jan 01, 2009 1:54 pm    Post subject: Reply with quote

Was just about to say self-extractor.
Its a bit of a ball ache. You have to put more force in than you'd expect.
I always double check to see if I'm doing it right coz it doesn't seem to do much at 1st. I used a hammer to tap the allen key round to get it started. Shocked

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teacherman



Joined: 25 Sep 2008
Posts: 93
Location: York

PostPosted: Thu Jan 01, 2009 3:38 pm    Post subject: Reply with quote

I'm not having much luck here Laughing Can BB's seize in the frame? I can't get mine out at all. I'm defo turning it the right way - opposite to the little indicator arrows.

I've put a little chain oil on to see if that loosens it any.

Any other ideas guys?

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Gunner



Joined: 15 Apr 2007
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Location: Under Whitestone-Cliffe on the Lake.

PostPosted: Thu Jan 01, 2009 4:33 pm    Post subject: Reply with quote

http://parktool.com/repair/readhowto.asp?id=95#sram

"The left arm has a one-key release system. No puller is required to remove, simply use 8mm hex wrench and turn crank bolt counter-clockwise."

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SeanO



Joined: 17 Feb 2008
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PostPosted: Thu Jan 01, 2009 5:17 pm    Post subject: Reply with quote

Are the crank arms off yet?
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teacherman



Joined: 25 Sep 2008
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PostPosted: Thu Jan 01, 2009 10:09 pm    Post subject: Reply with quote

Hah, yeah sorry - forgot to update and say thanks. Yep cranks came off easy. BB removal tool just needed some erm, persuasion with a hammer.

All done now - buttery smooth. 1st fairly major repair done Very Happy

Thanks for all your help guys Cool

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