While I hesitate to recommend in this application, when messing around with old
motorbikes, I've had success with heat cycling the components (talking about
a blowlamp - I think the thermal expansion crushes the corrosion between the
components
into dust/breaks the bond?) and if it were a bike wheel, I'd try a very
long bolt/rod fed through from the opposite side at a bit of an angle followed
by lots of hammer tapping (easier to push something out than pull?). Obviously
there are also many proprietary dismantling fluids, though I've had less
success there (too impatient no doubt). Hope that helps.
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