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Evening folks
I'm trying to remove a Shimano BB-ES300 Octalink BB on a Whyte 806... and it just won't move!
I've sprayed it with GT85 & left it. The removal tool is engaging really well. I'm turning counter-clockwise on the non-drive side/clockwise on the drive side and it's clicking out (just to loosen?!) my torque wrench at 90Nm yet it should only have been tightened to 50-70 Nm?! It quite literally won't move!
That said, admittedly I'm no expert. Am I missing something? Anyone else had this experience? How do I remove this Bottom Bracket?! Any tips/suggestions very gratefully received...
Many thanks, in advance.
Fix tool in a vice, use frame as a lever.
Are you going the right way?
Octolnk you can use the crank bolt to hold the tool on.
Frame in sturdy vice in very heavy bench.
Scaffold pole over the end of the spanner
I took one out with a bar extended to about 3 feet
Why are you trying to undo it with a torque wrench?
Depending on frame material, a big kettle of boiling water poured over the BB shell may cause some expansion of the shell to help loosen its grip
Ian
As above, first make sure you are going the right way.
Then bolt it in.
Then find an extension bar or vice. I've used a 4' scaffold bar with me stood on it for the most stubborn I've ever done.
Fix tool in a vice, use frame as a lever.
This usually works, but make sure your vice is well attached.
Friend was doing this, and broke his toes when 20kg of Record no.5 detached from his workbench and landed on his foot.
If it was installed to 50-70Nm then I'm not surprised that it's over 90Nm to remove it so if you're basing it not coming undone based on 90Nm it's quite possible you're just being too gentle. ("Breakaway" torque is usually a lot higher for fastners - and a BB is particularly susceptible with all of the alternating loads on it plus dirt, having been installed for a long time and into what's probably not a very well cut thread to start with).
That being said, the ideas above seem good. Fastener (QR?) through the axle to ensure that the tool doesn't slip and a long lever. Don't use your torque wrench - far too brutal a job to subject it to. Hot water on the frame should have an effect if it's an Al frame. Take care that should it suddenly "go", the tool slip out etc your hands won't impact into anything overly painful.
Good luck !
Bolt tool to crank with crank bolt.
Clamp tool in vice
Use frame as a lever.
I had to do this with an ISIS BB that had been in for years. It sounded like a gunshot when it finally released!
As an aside - I did a crankshaft bolt once with a 0.5" drive breaker bar with a 10ft scaffold pole on the end. Took 11 stone hanging on it to get it to give!
If not the vice a t bar with a 3 ft tube on each end and a a pal. Then smack the shell with a hammer once its all under load -boiling water will also help
Also try Halfords "shock and unlock" and/or soak with plus gas before trying to undo
Instead of struggling to get out stuck bottom brackets, i just use my 1/2" impact driver. Never failed to remove one yet
Or get an impact wrench what you hit with a hammer.
Torque wrenches aren't intended for undoing stuff, just for tightening them.
As above, with Octalink you can put a bolt through to hold the tool in place, then use a long powerbar with a piece of pipe to extend it.
Had exactly this problem when stripping a bike fror powder coating. Had to get a bb tool that fit in the vice and clamp to tool in place with a g clamp as the notches were not great.
Ended up having to heat the shell on the alu frame to give up its grip on the bb. Slowly does it.