Any step-by-step guides how to regrease a hub?

You've been told that by someone who doesn't know how unicycles are
constructed.

There are two possible problems with bearings on your unicycle; the
wheel bearings (which are what your frame attaches to) or the pedal
bearings. Usually the wheel bearings are sealed; if they're grinding,
they are probably shot, and you should buy a new pair and install them.
But it's more likely that your pedal bearings are problematic.
Exactly how to repack your pedal bearings depends on what pedals you
have, but generally, the method is to remove the dust cap on the end of
the pedal, remove the bolt holding the pedal on the pedal axle, clean
and degrease the pedal axle and the bearing races inside the pedal, put
new grease on the bearing races and pedal axle, and install new
bearings.

--
tholub
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