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 Post subject: Bottom bracket woes
PostPosted: Fri Sep 14, 2007 2:01 pm 
Old School Grand Master
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Joined: Tue Jul 05, 2005 3:14 pm
Posts: 13410
Location: Warwick
I don't want to take 2 of the bikes to the LBS. More hassle than its worth for something I should be able to sort out myself.....so let me begin:

BB stuck in 2 frames. Need to put in a wider axle in both bikes.

I think its just the cups need a good crank to get them free - these are the shimano sealed units I'm talking about.

Anyone with any tips?


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 Post subject:
PostPosted: Fri Sep 14, 2007 2:08 pm 
Gold Trader / PoTM Winner / RB Rider
Gold Trader / PoTM Winner / RB Rider
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Joined: Wed Oct 05, 2005 7:45 pm
Posts: 10946
Location: kent
put the tool in a vice and turn the frame round .


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 Post subject:
PostPosted: Fri Sep 14, 2007 2:09 pm 
BoTM Winner / retrobike rider
BoTM Winner / retrobike rider
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Joined: Thu Nov 23, 2006 2:12 pm
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Jez, I have a Shimano B/B tool that fits onto a 3/8 drive ratchet. I use a length of alloy pipe to make the handle 3 foot long. The force usually moves them - be careful though!


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 Post subject:
PostPosted: Fri Sep 14, 2007 2:23 pm 
Old School Grand Master
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Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
Sounds crazy I know, but an engineer once told me that if you're stuck trying to undo a bolt etc, try turning it the other way, ie do it up. If it does move even slightly, you should then be able to turn it the other way and undo it.


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 Post subject:
PostPosted: Fri Sep 14, 2007 2:25 pm 
retrobike rider / Gold Trader
retrobike rider / Gold Trader

Joined: Sat Jul 21, 2007 9:48 am
Posts: 6980
Location: Bristle
yeah, that can sometimes break the bond

if the frames are at all precious, which being jez, is very likely, then i'd have a few goes then leave it to a pro.


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 Post subject:
PostPosted: Fri Sep 14, 2007 3:10 pm 
Retro Guru

Joined: Fri Aug 26, 2005 9:41 am
Posts: 1217
Location: bedfordshire
exately who is more 'pro' than jez :lol:
must have been in and around 100 bikes.

Jez: i turn bike upside down (saddle and bars stylee) and then can wrench right over the centre point, seem to be able to get more tug that way :roll:


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 Post subject:
PostPosted: Fri Sep 14, 2007 3:14 pm 
Retro Guru
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Joined: Fri Jan 05, 2007 12:14 am
Posts: 1321
Location: Sunny? Devon
Heat it up with a plumbers blow lamp, not too much just enough to warm it up, not burn the paint off.


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 Post subject:
PostPosted: Fri Sep 14, 2007 3:22 pm 
King of the DuckBoard
King of the DuckBoard

Joined: Sun Jan 28, 2007 12:30 pm
Posts: 21466
I seen a tin of stuff that you spray in to stuck nuts bolts and things leave over night then it should undo normal. good luck :)


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 Post subject:
PostPosted: Fri Sep 14, 2007 3:22 pm 
Old School Grand Master

Joined: Wed Jun 29, 2005 11:18 am
Posts: 15808
Location: near cwmcarn
B3 wrote:
Heat it up with a plumbers blow lamp, not too much just enough to warm it up, not burn the paint off.


thats gonna fook the finish tho! heatgun is a lot safer :)


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 Post subject:
PostPosted: Fri Sep 14, 2007 3:33 pm 
retrobike rider
retrobike rider
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Joined: Wed Jan 04, 2006 10:12 pm
Posts: 2993
Location: Northumberland
Normally go for bolting the tool into the bb using the crank nut and some washers, then place in a vice :wink:


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