Loose Bottom Bracket. Sugino Impel. Tools and Method advice please.

[matticus]

you may need to exert 300Nm of controlled torque.

To give a further magnitude guide, this is roughly a 90kg person standing on a 12" bar. (Quite a lot of torque!) I can confirm that is about what Iv'e needed to shift BBs in the past. (my wrenches weren't long enough on their own )

Heat helps. I've use a ciggy lighter when I didn't care much about the paint, it made the difference.

 

[Mr Cotter Pin]

Hello all,
And Much Thanks.
Every contribution has helped to loosen this cup.
To my surprise the cup came quietly.
I used the pipe wrench as pictured.
Because it came so easily I can only assume the oil that I have applied regularly over a number of weeks has helped enormously to ease it.
I was expecting to be able to remove the spindle once the cup was removed and not have to remove/deal with the other cup. But that does not seem to be the case. I'll need to do the same again on the crank side but turn the cup clockwise this time, to undo it.
The crank side cup is different in that firstly it is metal as opposed to plastic and secondly it seems to be shallow in depth in comparison because the extractor tool does not insert into it, quite so far. However I can still bolt the tool into place to avoid it slipping. So I am confident this too should be extractable with what I have. Oil, extractor tool, pipe wrench, time and some beans.
Thanks again everyone.
Happy riding.

 

[Ajax Bay]

OP - have a look at this thread and you'll see what you've got in there.
https://www.cyclechat.net/threads/w...y-of-the-discontinued-shimano-un55-bb.274954/

 

[Big John]

Whoa. What do you mean by 'crank side'? Do you mean the non-drive side? If so you DON'T turn it clockwise to untighten it. You turn it anti clockwise. Drive side undo by turning clockwise, non-drive side turn it anti clockwise. You may have meant to type 'anti clockwise' but its definitely typed 'clockwise'. Just to be doubly sure TURN IT ANTI CLOCKWISE on the non-drive side to remove the cup.

 

[Ajax Bay]

John - you can see he's got the left hand ("non-drive") side one out (see images). He meant what he typed; and what he typed "turn the cup clockwise this time, to undo it" will (of course) be correct.

 

[Mr Cotter Pin]

OP - have a look at this thread and you'll see what you've got in there.
https://www.cyclechat.net/threads/w...y-of-the-discontinued-shimano-un55-bb.274954/

Hello Ajax Bay, thanks for the link. I can see why I need to take the other cup out. It is integrated with the spindle.

 

[Mr Cotter Pin]

Whoa. What do you mean by 'crank side'? Do you mean the non-drive side? If so you DON'T turn it clockwise to untighten it. You turn it anti clockwise. Drive side undo by turning clockwise, non-drive side turn it anti clockwise. You may have meant to type 'anti clockwise' but its definitely typed 'clockwise'. Just to be doubly sure TURN IT ANTI CLOCKWISE on the non-drive side to remove the cup.

Apologies and Thanks Big John. I should have said, Drive Side or Chainwheel Side.