Originally Posted by
tach
.....
The freewheel does not make a ratcheting sound when turned backwards, and it sometimes skips when driven forward, so I'll drown it in mineral spirits, and if that fails, try my luck with the two-hole cap and look inside. Cogs look good.
And if all else fails, there's the hammer and punch idea.
If flushing doesn't work, and you opt for loosening the freewheel bearing cover (or cone) just loosen it a few turns, to expose a crack and spray solvent in there, then after it's dried, drip some oil in.
Do not remove the cone, and disassemble the freewheel because it'll be extremely difficult to rebuild while it's still on the hub.