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replacing the bottom bracket on the old mans bike tonight, he hasn't got self extracting crank bolts, is it a case of remove central allen bolt then persuade the crank arm with an impact applicator? also, the bb cups have the castleated edges, can I just use a big set of stilsons to remove them as I don't have the correct tool, I do have the correct tool to install the new bb.
The fitting/removal tool for those BBs is very specific and you'll likely never use it again, but I'd be worried about using anything else for the job as it would be very easy to make a mess of the BB shell, especially if it's tight/siezed.
My LBS had to have a rummage around for that tool, not many folk use them these days apparently. They're a bit of a liability really, the BB fitted to my commuter uses that method.
To remove the cranks using a hammer you'll likely shag the crank splines, so unless you want to use them again use a proper crank extractor with the ISIS/octilink adaptor. The splines are quite deep on ISIS, just applying brute force might take a while, a lot of flesh and is very risky.
[url= http://www.chainreactioncycles.com/Models.aspx?ModelID=14425 ]http://www.chainreactioncycles.com/Models.aspx?ModelID=14425[/url]
Something like this is what you need. DONT use anything else! The threads are fine and can strip if you try and bodge it
You could just put self extracting crank bolts on and pimp up your old man's ride?
Wouldn't bother trying anything else if you don't want a lot of faff and wrecked pair of cranks.
Before you fit the crank extractor, make sure you've removet the washer that sits under the crank bolt, it usually sticks there and jams the extractor up.