during disassemblying, cleaning and restoring this happened when other side of the crank hit against the wall.
bearing and seal slanted and stuck inside the space and barely moves. using plier could make no hope to take them out.
should I take the grinder and cut them out, or what else can I do?
by magiwogg
5 Comments
It looks to be stuck in the cup, not the actual bracket itself. You could knock out the bracket cups and replace the whole bottom bracket set, preferably for a set with sealed bearing (they are more durable that what is installed now)😉
I would take a piece of wood or plastic thin enough to fit through the axle hole and use a hammer to knock out the cups on both sides.
Especially the left(?) cup has probably suffered damage due to the bearing getting stuck.
A crowbar should not be used when maintaining or servicing any part on your bike, period😉
Edit: taking a second look at your photos, I realise that the crankset itself is still stuck in the bracket as well, correct?
You should first try to safely wiggle that out from the bottom bracket, as it looks to be a onepiece crank..?
Get a rubber mallet/dead blow/block of wood and hammer; something you can hit with that won’t fuck shit up.
Tap on the drive side of the crank to get it unbound, and back to where it would be if it were assembled.
Now remove the non-drive side bearing.
Crank should slide out.
The key is you.need to remove the bearing before trying to get the crank out.
One piece cranks suck.
If you are absolutely sure that you don’t want to use the crank again then sure, you could cut it, but the exact position where things are stuck, is inside the bottom bracket, so your crank will still be stuck after cutting it.
Maybe try to knock back the crank first. Once that is unstuck, you should be able to wiggle that out by hand, no tools required. Once the crank is out, then you can proceed with removing the bb parts😉
Knock the crank from the sprocket side, back to the original position. Once there, slide the caged bearing over the left side crank arm. Once the bearing is removed, slide the crank back through, just enough to remove the sprocket side caged bearing.
Once the bearings are removed, you should be able to remove the crank by sliding it through, without hammering or any force. Then you can remove the cups if necessary