Kona muni mula bottom bracket removal
- Thread starter matthew
- Start date
Konaglider
Retrobike Rider
- Feedback
- View
Think you'd be best off trying 'Parktools' website or sheldonbrown's site, you'll need some specific tools for the job inc'; crank puller, BB removal tool, 8mm allen key. Relatively straight forward job really.
dirtjumper_dmr
Senior Retro Guru
- Feedback
- View
Konaglider":1j411ftt said:
i cant remember the last time getting a bb out of an old frame was straight forward usually involves lots of huff and puff and stress 
I know what you mean. Last time I took a BB out of a frame it ended up needing a nearly complete strip down and the services of my metalworking vice - oh and a healthy dose of bravado and swearing
I fear this is the price we pay for indulging an interest in older bikes – by the time the BB has worn out it's often been in the frame untouched for a decade or more. If I'd been tuck in one place for a decade or more I'd be fairly reluctant to leave too (unless it's a place of work of course)
I fear this is the price we pay for indulging an interest in older bikes – by the time the BB has worn out it's often been in the frame untouched for a decade or more. If I'd been tuck in one place for a decade or more I'd be fairly reluctant to leave too (unless it's a place of work of course)
Konaglider
Retrobike Rider
- Feedback
- View
Well, you just need to know what you're doing I suppose True though , I've had some really stiff ones in my time :shock:
True though , I've had some really stiff ones in my time :shock:
Konaglider
Retrobike Rider
- Feedback
- View
Sounds good, just been looking at the meet thread, should be able to make it depending on'this and that'.
Coincidently may be taking BB out of old trek 820, skip find, this afternoon and popping into Viper frame, along with other bits, to make up commuter hack bike.
Coincidently may be taking BB out of old trek 820, skip find, this afternoon and popping into Viper frame, along with other bits, to make up commuter hack bike.
Matthew, I've tried to send you a reply to your PM, but for some reason it's still in my outbox here - in case there's a problem with it, here is what it says:
Well you must be bloody strong to get the drive side off without a tool, but you were wise not to try to force the other one. You need a crank puller like this one (you could maybe get a cheaper one than Shimano, but this is what it looks like) plus a 16mm spanner
http://www.chainreactioncycles.com/Mode ... odelID=671
then after that you need a BB removal tool like this plus a 32mm spanner (but I use an adjustable one)
http://www.chainreactioncycles.com/Mode ... odelID=689
you start with the non drive side of the BB. You may well find you need to lock the tool onto the BB by screwing the crank bolt through it with a suitable large washer (e.g., the one I use is 32mm across and has a 9mm hole) You may need to use quite a bit of strength, but it doesn't sound like that's a problem. The non drive side comes off in the normal way, anti-clockwise, but always remember that the drive side of the BB has the opposite thread, so it comes off clockwise
To install the new BB, just repeat the process with the BB tool, starting with the drive side. You won't need the crank puller to reinstal the crank arms, just tighten the bolts (I use a spare handlebar over the Allen key for a bit of extra torque)
if you don't want to buy the tools, ask your friend - but always remember that the first rule of bike maintenance is 'Never lend your tools to anyone, not anyone, not ever, no'. So don't be offended if he won't lend them to you - you need to take your bike to his place and do the work there. Only mad people lend out their tools.
get back to me if you hit any snags
cheers
Anthony Young
Well you must be bloody strong to get the drive side off without a tool, but you were wise not to try to force the other one. You need a crank puller like this one (you could maybe get a cheaper one than Shimano, but this is what it looks like) plus a 16mm spanner
http://www.chainreactioncycles.com/Mode ... odelID=671
then after that you need a BB removal tool like this plus a 32mm spanner (but I use an adjustable one)
http://www.chainreactioncycles.com/Mode ... odelID=689
you start with the non drive side of the BB. You may well find you need to lock the tool onto the BB by screwing the crank bolt through it with a suitable large washer (e.g., the one I use is 32mm across and has a 9mm hole) You may need to use quite a bit of strength, but it doesn't sound like that's a problem. The non drive side comes off in the normal way, anti-clockwise, but always remember that the drive side of the BB has the opposite thread, so it comes off clockwise
To install the new BB, just repeat the process with the BB tool, starting with the drive side. You won't need the crank puller to reinstal the crank arms, just tighten the bolts (I use a spare handlebar over the Allen key for a bit of extra torque)
if you don't want to buy the tools, ask your friend - but always remember that the first rule of bike maintenance is 'Never lend your tools to anyone, not anyone, not ever, no'. So don't be offended if he won't lend them to you - you need to take your bike to his place and do the work there. Only mad people lend out their tools.
get back to me if you hit any snags
cheers
Anthony Young
