THM BBright removal help

Discuss light weight issues concerning road bikes & parts.
trikobe
Posts: 168
Joined: Tue Dec 16, 2008 9:16 pm
Location: California

by trikobe

Need some help on removing a thm bbright bottom bracket from a cervelo. Turning the drive side that has the spline only causes the non drive side shell to rotate along with it. Apparently the loctite has loosen on the non drive side and now everything turns as a whole. There's nothing for me to grab a hold of on the non drive side to counteract. Anyone had this happen before that can give helpful suggestions? Thanks in advance

by Weenie


spdntrxi
Posts: 1622
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

can't you use another BB tool... I only have 1 THM tool, but the shimano one can grab it enough for stop it from turning like you describe.

kode54
Posts: 1211
Joined: Tue May 23, 2006 9:39 pm

by kode54

on my THM...i have 2 tools, one for each side.
- AX Lightness Vial EVO D + DA9150 + Enve SES 3.4 carbon hubs
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + DA9100 + Enve 3.4 CK hubs

audiophilitis
Posts: 509
Joined: Sun Jul 29, 2012 12:49 am

by audiophilitis

That has always been my fear on the THM BBRight bracket as the NDS does not have the spline -- I don't think there is a tool that will allow you to prevent the NDS from spinning.

Have the THM BB on one of my Cervelos and made sure the appropriate Loctite was applied and that everything was nice and snug. I now consider the BB as part of the frame so when bearings need to be replaced, I can do so without having to remove the BB. The Enduro BB30 bearing tool fits perfectly and can be used to remove/reinstall bearings with the BB installed on the frame. Hoping that the reason you're removing the THM BB is for bearing replacement -- if so, that's what I would recommend -- just tighten everything up again and use the appropriate tool to remove the bearings. If not, you can send an email to THM -- they're very responsive (THM's Marco Weger has responded to all of my queries).

trikobe
Posts: 168
Joined: Tue Dec 16, 2008 9:16 pm
Location: California

by trikobe

Thanks guys. As audiophilitis pointed out, there are no splines or anything as a matter of fact, on the non drive side for a thm bbright. I thought I had loctite it enough on installation but apparently not enough as it has worked its way free. Wanna sell my frame so I need to get it removed. Only thing I can think of is to make some deep depressions in the non drive side cup that will allow me to fit some sort of tool in there to prevent it from moving. But that will definitely destroy the thm bb. Will definitely have to email THM for advice.

mike
Resident Pro
Posts: 2455
Joined: Tue Mar 18, 2003 9:42 pm

by mike

pour some boiling water in a cup, place the frame sideways and place bb cup in the hot water. wait a few minutes. then use bb tool to remove.

trikobe
Posts: 168
Joined: Tue Dec 16, 2008 9:16 pm
Location: California

by trikobe

Is the boiling water for expanding the metal on BB up against the bb shell for more resistance?

mike
Resident Pro
Posts: 2455
Joined: Tue Mar 18, 2003 9:42 pm

by mike

No to release the loctite

trikobe
Posts: 168
Joined: Tue Dec 16, 2008 9:16 pm
Location: California

by trikobe

Mike Do you mean release as in to reactive the loctite to bond the bb back onto the shell because that would be what i would need. Or to undo the bond of the loctite, because it already has done that.

spdntrxi
Posts: 1622
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

it's to undo..

sounds like another THM tool is in order if you wanna do it right.... Like I said I only have 1 THM as well... but I'm able to get enough grip another random one( came with a cheap bike toolset, like from nashbar/performance) without messing up the THM BB.

mike
Resident Pro
Posts: 2455
Joined: Tue Mar 18, 2003 9:42 pm

by mike

Per above to undo the loctite. I would not try to reloctite it in place. You must use another tool to get the other end out. I xcan,thelp more because i don,t use bb right just the std clavicula screw in bb. Consult with thm. Give them a call.

mike
Resident Pro
Posts: 2455
Joined: Tue Mar 18, 2003 9:42 pm

by mike

Afterbyou break loctite bonds on both sides, i recommend using two clavicula bb ttols. Phil wood bb are similar in that u need two tools to install and remove bb.o

williamsf1
Posts: 259
Joined: Sun Jun 27, 2010 8:53 am

by williamsf1

how did you go with this? I am having the same problem with the BBRight BB

spdntrxi
Posts: 1622
Joined: Sat Jul 20, 2013 6:11 pm

by spdntrxi

buy 2 thm tools... it's the easiest way..

williamsf1
Posts: 259
Joined: Sun Jun 27, 2010 8:53 am

by williamsf1

yeah I don't actually think you know what you are talking about

https://fairwheelbikes.com/assets/image ... x100_0.jpg

It only has the spline on one side....

NEXT

by Weenie


Post Reply
  • Similar Topics
    Replies
    Views
    Last post