Suitable bearing drift
I've got the tool that bolts to the chaincase studs and pushes the crank out. I put a length of threaded rod through this and use an old bearing up against the new one to draw the new bearing into the casing. You will need a large washer as well. It helps, as you say, to heat the casing ( I use a hot air paint stripper gun rather than a naked flame ), and put the bearing in the freezer.
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Bilko
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corrado wrote:I got a bearing extractor / fitting tool from Rich Presley a few years ago, it was expensive, over £50, but it's been a great tool and I must have used it over 50 times so paid for itself a few times over.
I did this too. It does seem to some a hefty price for a tool, but worth every penny knowing the jobs done properly.