Steinway action noise

[Greg Newell]

Near as I could gather from a bleeded out serial number before the "rebuild"
it's something like 85828 but then the 8's could be 3's or really anything
goes here. The numbers were then completely obscured during the "rebuild". I
see all the disparities thanks to John's very clearly done graphics. Thanks
John! I still wanna know how you do that.
Shimming alone does not seem to make a workable solution. I believe that I
will have to replace the wippen rail and move it back about 2-3mm and I
might still have to shim. Of Course then, I'll have a bunch of other things
to do too. I'll likely have to move the capstans (which would give me the
chance to replace those horrible hexagonal ones) and reweigh the keys. It
looks like the shanks will have to go too since the hammer line will have
changed if I decide to move the hammer rail. Putting 2 thicknesses of
buckskin under the top half of the wippen flange and one thickness under the
action side of the hammer flange seemed to bring things into somewhat normal
relationship. If I shimmed along the entire length of the wippen flange 4mm
did not cut it. With 2 thicknesses of buckskin under the top half of the
wippen flange the screws don't have a very good bite anymore. Some were
stripped out anyway and replaced with much larger screws as someone's fix.
That and the large amount of buckskin is why I'm considering moving the rail
out. I'll have to grind a little out of the bracket holes but I think I may
have just enough room. Once I do that I figure that I'll still have one
layer of buckskin under the top half of the wippen flange but that single
layer should allow me to retain some of the integrity of the shape from the
rail. I hesitate to use something like brass rod under the flanges since
that will allow them too much float. Buckskin so far has looked the best.
Well, off and running another direction .... again.
Thanks for everyone's continued interest.

All the best,
Greg 

-----Original Message-----
From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf
Of Richard Brekne
Sent: Monday, November 19, 2007 2:44 AM
To: pianotech at ptg.org
Subject: Steinway action noise

Johns picture also shows the difference in the length from the flange 
screw to the center pin, tho the two flanges are not lined up to show it 
directly. Still... you can clearly see that the centers are nearly in 
the same spot with the same blue line intersecting them both. The newer 
flange shows it about 0.3 mm offset from the old one. But if you look at 
where the center of the flange screw hole intersects with the lines you 
see the purple line goes right through the center of the old flange 
screw hole but the newer flange is offset at least one whole blue line back.

You mentioned you had a 17 mm knuckle to centerpin length Greg on the 
new parts.  If I remember right Johns picture was just showing the 
difference between  16.3 and 16 mm lengths found from different 
manufacturers at different times.

You say this is an old A.   Just how old ?  Whats the serial number on 
this ?

Cheers
RicB

    John,

                    Awesome graphics! How do you do that?

    Greg


    P.S. along with other disparities I see the core to hammer flange
    center is
    slightly different too!

     
    Url :
 
https://www.moypiano.com/ptg/pianotech.php/attachments/20071118/b760d9ac/attachm
ent-0001.obj