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PostPosted: Mon Oct 28, 2013 9:44 pm 
Dirt Disciple

Joined: Mon Oct 28, 2013 9:29 pm
Posts: 21
Just about to travel down to Devon, I intend to sort out my brothers Diablo. I have researched replacing the front wheel bearing and know what I need but I am having problems finding the details of the crank bottom bracket. I believe the crank is a Shimano XT M730, but am struggling to find details so I can replace the bearings etc. Grateful for any advice? cheers


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PostPosted: Mon Oct 28, 2013 9:50 pm 
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Joined: Fri Aug 20, 2010 11:28 am
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Location: Gorleston-on-sea (If there is a bright center to the universe this is place furthest from it
Hi

In all likelihood it will be a Raleigh cup and ball unit, if it is it will use 1/4 ball bearings

;-)


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PostPosted: Mon Oct 28, 2013 9:55 pm 
Dirt Disciple

Joined: Mon Oct 28, 2013 9:29 pm
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Thanks Kermit will try and get prepared before I go, cheers


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PostPosted: Mon Oct 28, 2013 10:09 pm 
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Location: Gorleston-on-sea (If there is a bright center to the universe this is place furthest from it
It will probably have caged bearings but I would recommend using loose as they last longer :D


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PostPosted: Mon Oct 28, 2013 10:19 pm 
Dirt Disciple

Joined: Mon Oct 28, 2013 9:29 pm
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Thanks for the tip, will need to get lockring spanner sorted, then hopefully can get it sorted, It's a great little bike just needs a bit of care. Cheers


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PostPosted: Mon Oct 28, 2013 10:23 pm 
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I have a Diablo and love it to bits :D :D


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PostPosted: Tue Oct 29, 2013 1:28 am 
National & North West AEC
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Joined: Mon Nov 03, 2008 12:43 am
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Location: Macclesfield Forest
If it's a Diablo then it's more likely to have a Shimano sealed cartridge type BB. Diablos first appeared in the 1992 Dyna Tech range which is a time when many manufacturers were moving over to cartridge rather than cup and cone BBs.
All the ones I have seen have cartridge BBs and the 1992 catalogue also confirms this: --> http://www.retrobike.co.uk/gallery2/d/5 ... +Bikes.pdf

In terms of correct size, you'll need a replacement BB with a 68mm shell and 122.5mm BB spindle for the M730 crankset.


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PostPosted: Tue Oct 29, 2013 1:36 am 
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Location: Gorleston-on-sea (If there is a bright center to the universe this is place furthest from it
I thought it was close to the start of Cartridge BB's but was not 100% sure it would be one on this model :wink: :oops:


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PostPosted: Tue Oct 29, 2013 8:42 am 
Dirt Disciple

Joined: Mon Oct 28, 2013 9:29 pm
Posts: 21
Thanks for all the advice just found pic of someone with a seized bearing and thought it looked a little like a cartridge.
I am now tempted to get something a little retro to go with my Trek, we had a weekend in the Peaks based at the Royal Oak Hurdlow(Highly recommended) and the Diablo performed well and kept up with our 29ers the front wheel was a little disconcerting on the descents and the big girls saddle he had put on for his wife didn't add to the experience!
Cheers


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PostPosted: Tue Oct 29, 2013 11:27 am 
retrobike rider / Gold Trader
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Joined: Fri May 08, 2009 10:01 am
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Location: Stockport, staring at the Peaks
Cushty :lol:

Take some PlusGas, a way of bolting the BB tool in place (crank bolt, spacers etc) so that it can't slip, and some serious leverage - sorry to say but the Raleigh factory in '92 was a grease-free zone :x

The force needed to shift mine ('91 MT4) actually split the ti chainstay along it's length, without budging the BB.

Fingers crossed you have a better time of it, good luck!


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