Retrobike Forum Index

It is currently Fri Dec 02, 2016 7:11 pm

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject: BB Help Please!
PostPosted: Fri Jan 30, 2009 9:22 pm 
Old School Grand Master
User avatar

Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
I'm looking at one of those new fangled sealed bottom brackets that I need to get out of a frame. I've got the spline tool and a big stilson! Which end do I attack first? The plastic (non drive) side or the metal (drive) side. Will one of the threads be handed?

Thanks!


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:29 pm 
retrobike rider
retrobike rider
User avatar

Joined: Tue Nov 11, 2008 12:28 pm
Posts: 4179
Location: rutland
assuming its a normal frame and not some johnie foreighner :lol: left side ( non drive side ) first but i dont normally take it out completely , just enough so its can come out with a few turns by hand later

its a righthand thread in the left side so itl undo anti clockwise

then the right hand side which is a lefthand thread thatl need to be undone clockwise

once thats out completely unscrew the left

an easy way to remember is that they tighten to the rear , loosen to the front


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:31 pm 
Retro Guru
User avatar

Joined: Wed Apr 23, 2008 9:57 pm
Posts: 2437
Location: Kent UK
It's usually easier to remove the non-driveside first. That undoes in the normal direction (anti-clockwise as you are looking at it). The driveside undoes in a clockwise direction. The easiest way to remember is that to undo the cup turn the spanner towards the front wheel. Tightening it turns the spanner towards the back wheel. :)


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:34 pm 
retrobike rider
retrobike rider
User avatar

Joined: Tue Nov 11, 2008 12:28 pm
Posts: 4179
Location: rutland
xesh has written it in a less confuseling manner :lol:

hold the tool with your left hand and push it in to stop it slipping with your palm . i can normally get a few fingers around the downtube or chainstay which makes it easier


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:39 pm 
Old School Grand Master
User avatar

Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
Thanks people! The drive side seems to be stuck good!! Going to use some penetrating oil sprayed in from the non-drive side.

I love the smell of GT85 in the lounge!


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:39 pm 
Retro Guru
User avatar

Joined: Wed Apr 23, 2008 9:57 pm
Posts: 2437
Location: Kent UK
perry wrote:
hold the tool with your left hand and push it in to stop it slipping with your palm.


Even easier (at least on the driveside) is to use a bolt with the same thread,but longer, and a large washer. Then you can use both hands on the spanner.


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:43 pm 
Retro Guru
User avatar

Joined: Wed Apr 23, 2008 9:57 pm
Posts: 2437
Location: Kent UK
Iwasgoodonce wrote:
Thanks people! The drive side seems to be stuck good!! Going to use some penetrating oil sprayed in from the non-drive side.

I love the smell of GT85 in the lounge!


The driveside is usually done up very tightly. Don't even think of using a spanner less than 12" (300mm) long to get the leverage. Sometimes I've had to use a long bar on the end of the spanner to add leverage. Other times even that wasn't enough and I then had to jump on the bar to get it to move (this is usually only necessary on seized BBs). :shock:


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 9:51 pm 
retrobike rider
retrobike rider
User avatar

Joined: Tue Nov 11, 2008 12:28 pm
Posts: 4179
Location: rutland
thats very true and i was about to suggest it after the mention that its stuck :lol:

mechanical advantage suggests you would put the spanner along the chainstay and with one hand on the stay and the other on the spanner pull them apart . but thatl depend on clearance ( dont punch yourself in the face and if you do make sure no one is around to see )

the other way would be to have it at a quater past 9 and push down but be ready for it to "crack " off otherwise you could be throwing your whole body weight at the floor and punching the ground isnt too fun

third way if there are wheels on the bike and its being realllly hard . put some boots on and gently step on the end of the spanner , but again be ready for it to crack


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 10:19 pm 
Old School Grand Master
User avatar

Joined: Thu Jul 19, 2007 7:18 pm
Posts: 3798
Location: Staffordshire
It's out! Who needs knuckles anyway?

Also it looks like it is 5mm too long for the cranks. 110 anyone?

Thanks for the rapid answers chaps!


Top
 Profile  
 
 Post subject:
PostPosted: Fri Jan 30, 2009 10:34 pm 
retrobike rider
retrobike rider
User avatar

Joined: Tue Nov 11, 2008 12:28 pm
Posts: 4179
Location: rutland
cool

i always try to answer any tech questions i can as quickly as possible , most of the time people only ask when they are in the middle of something and get stuck so its always helpful getting a response without having to sit around for hours with your stuff all over the living room floor and a mrs home any time soon :lol:

with the bb out itl be a good chance to inspect and clean the inside of tubes as well as any rustproofing you might want to do . inspect and clean the threads and grease when the next bb goes in

also when its time to insert put the left in first a bit so its on the first few threads . it helps support the bulk of the right hand side and it can be a faff trying to get the threads lined up on the left if the right side is in


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC [ DST ]


Who is online

Users browsing this forum: Andy B, FairfaxPat, Mike Muz 67, Yahoo [Bot] and 34 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