I've managed to strip the crank extraction threads on the non-drive side crank. I'd unwittingly managed to damage the crank extractor by cross threading and then it in turn damaged the threads. The nett effect is that I have a smooth surface where once I had threads!
I can remove the drive side crank and completely unscrew the bottom bracket but that's as far as I can get.
I've tried pouring hot water on the crank then punching out the BB. That didn't work. I've tried a 3" gear remover but there just isn't enough clearance and in any case the crank has a curved profile which means there isn't anything to grip on. I've also tried drenching it in WD40 and chain oil.
Has anyone got any other ideas? Has anyone any experience cutting through the square tapered section of a Shimano BB? Will a Dremel do (I'll buy one if it will do the job) or will I have to resort to an angle grinder?
I'm ready to consider any option at the moment.
I can remove the drive side crank and completely unscrew the bottom bracket but that's as far as I can get.
I've tried pouring hot water on the crank then punching out the BB. That didn't work. I've tried a 3" gear remover but there just isn't enough clearance and in any case the crank has a curved profile which means there isn't anything to grip on. I've also tried drenching it in WD40 and chain oil.
Has anyone got any other ideas? Has anyone any experience cutting through the square tapered section of a Shimano BB? Will a Dremel do (I'll buy one if it will do the job) or will I have to resort to an angle grinder?
I'm ready to consider any option at the moment.