In article , Bob May says...

The cheap fix is to remove the old oil yourself and relubricate. However,
this does mean that you have to disassemble the instrument all the way and
that can be fun if you don't know how they go together.

Really you need a microscope to really see what's going on in those.

Often the sore point is the 'mainspring' that preloads the mechanism.
It's frequently held in place with a pin or a swaging that's tough
to get apart, and back together, unless you can really see what's
going on. One also needs to inspect the jewels and pivots carefully
to be sure they're not damaged, and ultrasonic the parts in some
solvent.

I like to re-lubricate the jewels with ATF actually. I use a 0.003
inch diameter piece of copper wire bent into a tiny loop at the
end to hold just about the right amount of oil to hit the bearing
with.

Jim


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