Also check the key-frame. With the action in the piano, take a long screwdriver and push the back rail of the key-frame down and see if the noise is eliminated. If so, you will need to fit the key-frame to the bed.
Al
From: Tom Driscoll
Sent: Thursday, April 02, 2009 11:13 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] Young Chang action noise
James and Steve,
The jack regulating punchings were my first guess too, but Steve mentioned that he added bushing cloth between the spoon and the punching with no improvement. Although the punching seems to be ruled out as the culprit I had an action recently that I was sure needed the punchings replaced. Turned out that the repetition lever springs were way too strong and the hammer was jerking up like crazy.
When I adjusted the spring on a sample note for a more reasonable rise the jack "leg " (Correct Nomenclature?) of the spring returned the jack with less force and the thumpy -tapping impact of the regulating punching impacting the spoon was gone. How are the rep springs on this thing?
Just a thought.
Best wishes,
Tom Driscoll RPTired
Subject: Re: [pianotech] Young Chang action noise
I had a similar experience with a fairly new Young Chang grand. I replaced the jack regulating button felts and the knocking went away. Fortunately, Young Chang picked up the bill under warranty.
----- Original Message -----
From: Steve Blasyak
Subject: [pianotech] Young Chang action noise
Greetings to all,
I had an action problem today I am seeking advice from the group.
The patient a small Young Chang G 157 sn 10952. Action is very noisy clunky. It seems .
<Big Snip>
I checked the regulation buttons by adding a bit of bushing cloth between the button and the spoon. No improvement. Steve Blasyak
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://ptg.org/pipermail/pianotech_ptg.org/attachments/20090403/fa8f2860/attachment.html>
This PTG archive page provided courtesy of Moy Piano Service, LLC