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Old 28-03-2013
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bretts bretts is offline
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Default Help with MTB bottom bracket

Hi

I've got all of play in my bottom bracket, so I fancy fitting a new one.

As you can see my bike is quite old.

So I just need some help with what tools are needed to get the old one out and put a new one in.

I've measured the frame and it's 68mm.

Can you help?

Thanks

Brett

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Old 28-03-2013
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to get that off you will need a crank puller. you can get them from a halfords or a local bike shop. this is what your looking for. http://www.halfords.com/webapp/wcs/s...egoryId_242558 also you'll need a couple of sockets and a pair of grips. be ready tho as the bearings could be free running balls with no cage to hold them. when you do take them out rememeber to replace the grease in the bearing races.
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Old 29-03-2013
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Thanks for the reply.

I'm off round to my mate's to use his crank puller, I've got a 14mm socket, but I think I'm going to get one of those bottom bracket sockets as I'm fitting a new sealed BB when it's arrives.

Ta
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Old 29-03-2013
mattr mattr is offline
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Crank puller to get the crank off.
Lock ring/c-spanner to get the lock ring off. Drifting it off will do the trick too, unless you slip.
Suitable spanner to get the cup out. Can't remember the size, it's been 20 years since I took one of them out. An adjustable should do it at a push.
And probably a 32 (?) mm spanner to get the right hand cup out. An adjustable will be an utter pain on that side, as it's only about 3mm wide, and only 2 flats, so not many attempts with a slipping spanner before you have to drill it out.
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Old 04-04-2013
vrooom vrooom is offline
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You don't need crank puller or any special tools, you can use rubber mallet to carefully tap that crank out, even though crank arms at that age will fell off on it own, You can use adjustable spanner to undo the bearings cover, and use the flat nosed screwdriver to tap the slots on the "screw" I think its left handed thread. not too sure about that.
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Old 05-04-2013
mattr mattr is offline
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Quote:
Originally Posted by vrooom View Post
You don't need crank puller or any special tools, you can use rubber mallet to carefully tap that crank out, even though crank arms at that age will fell off on it own, You can use adjustable spanner to undo the bearings cover, and use the flat nosed screwdriver to tap the slots on the "screw" I think its left handed thread. not too sure about that.
"Carefully tap", you must write haynes manuals for a living. They usually need braying off with a lump hammer if the threads have gone, unless its broken, or been run loose for a few hundred miles. Then it falls off, all the time.
And its not a bearing cover.
Right hand side has reversed threads.
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Old 16-04-2013
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bretts bretts is offline
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Hi all, thought I'd update you.

Thanks for all the help.

Job all done!! and new bottom bracket fitted. Cranks were rock solid on but old bottom bracket came out quite easily in the end. Well worn out!

(Halfords quoted £43 inc parts for doing this as it old skool)

Here's what I needed.

Crank puller - £2.99 ebay which included a 14mm socket for crank bolt
Brand new Raleigh 24.5mm bottom bracket (same size as old one) - £9.50 ebay
Shimano style Bottom Bracket socket to fit the new one - £4.60 ebay
A sunny half hour without the kids about - priceless

All sorted for £17ish

Cheers

Brett
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