Retrobike Forum Index

It is currently Sat Dec 10, 2016 1:39 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 24 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
 Post subject:
PostPosted: Fri May 25, 2007 8:31 am 
Retro Guru
User avatar

Joined: Fri Jan 05, 2007 12:36 pm
Posts: 1087
Location: The Netherlands
Well mine looks like this:
Image


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 11:32 am 
Dirt Disciple

Joined: Sun May 06, 2007 12:31 am
Posts: 12
Location: Great Britain
If you can get hold of Plus Gaz then so much the better but a strong penetrating lube or spray should be used here. Take the seatpin out (or bottle bosses) and spray copious quantities of this into the BB shell. If you have a hole under the BB for the cable guide then spray copiusly in there too. Leave this for a good 24 hours to soak in and hopefully that should help loosen off the corrosion. The next part doesn\'t sound nice but it works wonders! Grab a reasonably weighted hammer (mine is 16oz) and give the axle a good hit several times from each side; this has the effect of \'cracking\' the corrosion and freeing things up considerably. The next stage is to grab a long breaker bar and socket fitting BB tool. A 2ft breaker bar should help here. If you can get someone to hold the frame solid whilst you are pushing down and rotating the breaker bar with very hard jerks rather than steady applied pressure. Try snapping it back and forth in opposite directions to further loosen the corrosion bonds.


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 11:57 am 
Retro Guru
User avatar

Joined: Fri Jan 05, 2007 12:36 pm
Posts: 1087
Location: The Netherlands
OK, I now have a bit of another problem I think :-( Just had a look at the frame to see what could be done and it seems the bike shop also wrecked/stripped the drive side of any teeth... god d*amnit!

Here's how both sides look...

Plastic thingie:
Image

The other side (so the actual cartridge where they tried yesterday in the bike-shop):
Image

Is there anything that can be done to get these things out when the teeth are gone?? Surely Shimano must have thought about some "back-door removal procedure"?? Or is there only the "Heat it up and dry banging it out with a big hammer" option left? Damn this really aggrivates me!


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 12:18 pm 
Karma Queen / Cake Meisterin
Karma Queen / Cake Meisterin
User avatar

Joined: Thu Jul 27, 2006 10:02 pm
Posts: 6737
Location: North Yorkshire
If all else fails and you really want to do up the frame. You could have a frame builder remove and replace the whole bb frame section. My husband had that done to his tourer, not for the same reason. It's not cheap though. :cry:

Alison


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 12:26 pm 
BoTM Winner
BoTM Winner
User avatar

Joined: Sun Oct 09, 2005 8:19 pm
Posts: 2197
Location: S WALES
you could try removing a section of the flange where the "japan/shimano" wording is , and then try knocking it around in the direction it should be unscrewed (hammer/chisel) ????


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 12:26 pm 
Dirt Disciple

Joined: Mon Apr 30, 2007 10:45 pm
Posts: 95
Heat and hammer looks like the only option now. Use a sharp cold chisel and try to get it hooked on the remains of the teeth or get a sharp punch and make a good indent before you try to tap round. You need to hold the frame still, in a well padded vice or on a sandbag.

And you still have the option to weld a small lug onto the cup as a last resort.

It will come out, it just may take some bloody mindedness.


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 1:52 pm 
Gold Trader
Gold Trader
User avatar

Joined: Sat Jul 29, 2006 11:14 pm
Posts: 3855
Location: Somerset
Stand on the frame and use a cold chisel and a lump hammer and work the cup round.

Carefully! :shock:


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 8:09 pm 
Retro Guru
User avatar

Joined: Wed Mar 21, 2007 8:13 pm
Posts: 1661
Location: fettling in the cave
Two options which i have done in the past.

1: Get local welder to weld a metal bar to the drive side cup and axle. use as the wrench. Done this a few times while I was managing a shop :D

2: 5 tonne press! from the drive side the plastic cup will have no chance of stoppin the axle poppin out!! Then you will have to cut the remaining drive housing into 3 and then knock out he pieces. and same for t'other side :twisted:


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 8:35 pm 
BoTY Winner
BoTY Winner
User avatar

Joined: Tue Apr 04, 2006 6:39 pm
Posts: 2568
Location: Durango CO, USA
I would just J-B Weld a cup removal tool to the BB, wait till it dries, then turn it out.

There is no such thing as 'never' when it comes to bike maintenance. Your LBS should know better :lol:


Top
 Profile  
 
 Post subject:
PostPosted: Fri May 25, 2007 9:21 pm 
East Midlands AEC
East Midlands AEC
User avatar

Joined: Thu Oct 05, 2006 7:45 pm
Posts: 15067
Location: Derby, UK
At this point I would hold the frame over a vice horizontally and grip the outer flange of the BB in the vice very tightly and then turn the frame round slowly....


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 24 posts ]  Go to page Previous  1, 2, 3  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: mattbrown, Mike Muz 67, MSNbot Media, seankrell, themountie and 43 guests


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 post attachments in this forum

Search for:
Jump to:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group