damper lever ht.

[Jon Page]

As I recall from reading somewhere (perhaps the Journal) the underlever 
should be straight out horizontally
when the key is fully depressed. So the height of the pivot pins should be 
adjusted to achieve this. I think
it would be counter productive to have the key lift the underlever beyond 
horizontal.

Also, the key end lifter felt height at rest should be around 1 3/8". This 
will result in the underlever rest position
to be about 1 1/2" above the key bed. So approximating with 1/4" damper 
travel at the front end, figure pivot height
from a horizontal underlever at 1 3/4". I haven't tried this but it is 
where I would start and fine tune from there.

Sand the bottoms of the underlevers smooth on the ends and area over the 
tray lifter felt (if accessible),
and coat with McLube 444. Brush teflon powder onto the key end felts as 
well. I've seen/felt some very rough
surfaces causing excess wear.

Regards,

Jon Page,   piano technician
Harwich Port, Cape Cod, Mass.
mailto:jonpage@comcast.net
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