Force needed to remove square-taper cranks?
Campag Mirage chainset on Campag square-taper BB. Removed retaining bolt, screwed-in extractor tool, gave it a couple of big-ish heaves. Nothing - no sign of any sign of movement....
Never done this before, don't want to strip threads or do other damage. If you believe the tutorials on the web this is not a brute-force job, but chances are they're nicely pre-loosened. Mine has not been off for ~14 years so may be a bit tight!
Am I likely to have to get physical with it, maybe tap the extractor arm with a mallet etc, or is this risky?
Cheers
Richard.
Never done this before, don't want to strip threads or do other damage. If you believe the tutorials on the web this is not a brute-force job, but chances are they're nicely pre-loosened. Mine has not been off for ~14 years so may be a bit tight!
Am I likely to have to get physical with it, maybe tap the extractor arm with a mallet etc, or is this risky?
Cheers
Richard.
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Comments
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make sure your extractor is fully screwed in before you start winding. You should have no problems then, but yes, you may have to give it a bit of welly.
Don't do what I did once and apply the extractor without removing the crankbolt first, that creates a mess.0 -
A bit of heat from a hairdryer, or heat gun can work wonders. Just take care, particularly with a heat gun on any lacquered or painted surfaces... who said that, internet forum people ?0
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Whilst its under tension I pour boiling water over the crank arm, the alloy arm expands quicker than the steel axle and pops off0
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Thanks guys. Good tips, especially the point about thermal expansion of aluminium V steel.
One crankset now safely removed and replaced.
Cheers
Richard0
