Crank and bottom bracket removal help

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I want to remove the cranks and bottom bracket ( truvativ )of my boardman but am not sure which method is correct for my bike. As you can see from the photo there appears to be something missing, is it just a blank cap or is it an integral part.
Do I just need to put the correct tool into the hole and unscrew it , and which way to loosen it (I'm guessing anti clockwise)
Any help is much appreciated
I want to remove the cranks and bottom bracket ( truvativ )of my boardman but am not sure which method is correct for my bike. As you can see from the photo there appears to be something missing, is it just a blank cap or is it an integral part.
Do I just need to put the correct tool into the hole and unscrew it , and which way to loosen it (I'm guessing anti clockwise)
Any help is much appreciated
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Posts
if you dont have the parts you will need a suitable crack puller.
see parktools for how tos.
Parktools :?:SheldonBrown
Cheers for the info
The crank is as you see it. I don't have any self extracting ring, can I do it without one?
If its n ot self extracting then you need a suitable crank puller - I had Truvativ Power Spline BBs for a while and they needed one like this - http://www.ebay.co.uk/bhp/crank-puller
Park Tools maintencance site is your friend on this and there are a fair few vids on U-Tube showing how its done. Ita a pretty straightforward process if you have the tools and are carefull not to cross thread anything.
and that looks like a GXP to me.
which should have the self extracting ring and washer.
but a puller can be used.
manual below
http://cdn.sram.com/cdn/farfuture/KjsIO ... 03-000.pdf
Parktools :?:SheldonBrown
Don't know the PSP Truvativ BBs I had were with unbranded cranks that came OEM on a Spesh bike.