removing a stubborn...
 

[Closed] removing a stubborn bottom bracket

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hi got to remove a square shimano bracket. think its a un one. got the tool . One side appears black plastic , one silver metal.

1) Which side do i undo? both?
2) The thing seems in tight. how to i secure the tool so i use leverage. Tool keeps popping out. Can only think of a long bolt through the bb tool to the square tapered crank, but don't have one of these.

cheers


 
Posted : 29/04/2011 5:14 pm
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A QR might be enough to hold the tool in


 
Posted : 29/04/2011 5:36 pm
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thanks. The axle is not hollow though?

oh i see externally?


 
Posted : 29/04/2011 5:39 pm
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kettle full of boiling water poured slowley over offending part and put the tool in a vice, put body wieght on top of frame and cross fingers.


 
Posted : 29/04/2011 5:42 pm
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Sorry - I thought ocatalink with a hollow spindle - my mistake. Can you not use a crank bolt to hold it on?


 
Posted : 29/04/2011 5:43 pm
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need a longer one than i have to clear the bb tool. may be the way forwards. cheers. pitch on the bb bolt looks odd though. the bolts are old basic types and undone using a socket.

probably best to use a long bolt, soak overnight in a release agent and then use a vice, using the frame for leverage.

not even sure what a release agent is though.. just read this on the web. ๐Ÿ™„ presumably its like plusgas


 
Posted : 29/04/2011 5:45 pm
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think this could be one for the lbs


 
Posted : 29/04/2011 6:09 pm
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plusgas has no affect on aluminium according to toolmaker/engineer i work with, he advised me to use boiling water.

soaked a problem aluminium calliper bolt for a week in blutac reservior and it didnt work,,,, boiling water worked better for me.

try both.


 
Posted : 29/04/2011 6:18 pm
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Tool in a vice. Use the frame as leverage.


 
Posted : 29/04/2011 6:20 pm
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thanks so much. Will give it ago.


 
Posted : 29/04/2011 7:35 pm
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Try and find one of [url= http://www.sjscycles.co.uk/tacx-tl4415-bottom-bracket-remover-tool-for-shimano-standard-m8-prod20390/ ]these[/url]

It screws into the BB axle and you use a large spanner to turn it and unscrew the BB.


 
Posted : 29/04/2011 8:01 pm
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ok thanks.


 
Posted : 29/04/2011 8:10 pm
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start with the left hand side. normal thread. then right hand side, anticlockwise thread. often the rh one is easier to turn once the left is out


 
Posted : 29/04/2011 8:29 pm