Seized BB30 Crank & Bearing
jc-bike-person
Posts: 69
All - I am in need of some help.
My BB30 crank has seized inside the bearing. I cannot remove it.
I have got the non-drive side crank off and it has exposed the other crankset through the bearing
Apparently - the correct way is to 'knock it out' with a rubber mallet. However I have tried this and it is not moving
(as per the workshop article on this site)
I have hit it pretty hard (and then very hard) with a big hammer and a block of wood - but still no movement
Any ideas?
Some 'chemical to spray into the joint area? (already tried GT40)
Heat it up?
Anything else?
My BB30 crank has seized inside the bearing. I cannot remove it.
I have got the non-drive side crank off and it has exposed the other crankset through the bearing
Apparently - the correct way is to 'knock it out' with a rubber mallet. However I have tried this and it is not moving
(as per the workshop article on this site)
I have hit it pretty hard (and then very hard) with a big hammer and a block of wood - but still no movement
Any ideas?
Some 'chemical to spray into the joint area? (already tried GT40)
Heat it up?
Anything else?
... must train harder
0
Comments
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Plus gas and more force."Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
Parktools :?:SheldonBrown0 -
as above, try plusgas, for penetrating it's better than wd40, way way way better than gt85
if there's a hole in the underside of the bb shell, try to get some in there so that it runs onto the bearings from the inner side (bike horizontal, spray in and rotate cranks, leave it an hour, turn bike over, repeat to get at other inner face
the bearing races will be steel, the spindle aluminium alloy, heat will just make it tighter
you could try a can of freezer and spray inside the spindle, it'll contract more than the steel of the bearing racemy bike - faster than god's and twice as shiny0 -
Thanks. Can of Plus-gas bought
Time to bring out the big hammer... must train harder0