wurlitzer(chinese) grand

BobDavis88@aol.com BobDavis88@aol.com
Thu, 26 Jan 2006 21:32:40 EST


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Oops, sorry, I left out a step in the hanging damper assessment. In the first 
two instances, the sostenuto rod is also either too close in or not rotating 
far enough down on release; but if only the damper pedal causes the problem, 
and not a slowly released key, you probably also have a pedal travel issue.

In a message dated 1/26/2006 10:52:14 AM Pacific Standard Time, 
BobDavis88@aol.com writes:
Some diagnosis can be done without removing the action. Quick test: Depress 
damper pedal and release. Lightly push down on hung damper head. If it returns 
with a light snap or won't go down, the sostenuto tab is rising past the 
sostenuto rail, probably because the damper PEDAL stop (not just the upstop rail) 
is allowing the damper pedal to take the dampers too high. On Steinways, you 
can confirm by pulling action out 1/8 inch and trying again. Because the 
sostenuto is on the key action, the damper will now not hang.

If on the other hand it hangs when using the key, the damper upstop rail is 
probably too high, allowing the tab to blow by the rod.

If the damper does not snap, but goes down with steady resistance, you can 
then go after friction in the underlever flange, top flange, or bushing. First, 
play the note. Push the head lightly to left and right. If it moves one way, 
the bushing is PROBABLY free. You can develop a feel for how much it is sprung 
against the bushing. If it flunks or is inconclusive, THEN you can remove the 
action. 

Lift the underlever with one finger. You can feel friction. With one finger 
of the other hand, press the wire gently left/right, right under the bushing. 
One way it will move with you, off the bushing. The other way it won't. If it 
moves opposite your push both ways, the bushing is probably too tight. If not, 
then you can remove the wire and check for top flange friction and mount 
flange friction. Last resort take out the underlever. It takes longer to describe 
than to do.

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