I had problems from new with sticking keys on my C2 Grand and I found that
there was no lubrication on the solenoid plungers. This is easily solved
by removing the action and applying DRY POWDERED GRAPHITE to them.
Simply lift each plunger in turn and rub the powder into the metal surface with
a finger. Messy but highly effective. I did this about three times when
the piano was new, excercising it for a for a few weeks between each
treatment. The action is now perfect. Remember to re-calibrate
the key velocities afterwards by running the "Keyboard Measurement" routine.
This has made a tremendous difference to the overall performance and the piano
is now "run in" and stable. It is the correct thing do and
harmless as long as you NEVER use an oil based lubricant.
;
If you haven't removed a grand action before do be careful. I suggest
you seek professional help or, at least, write to me and I'll describe how
to do it without breaking off the hammers !
Powdered graphite is available from locksmiths but make sure it is dry and
not in solution.
Richard Stibbons M I M I T
Cromer England