Steinway action noise

[Francisco Motta, afinador de pianos]

Re: Steinway action noiseMax Matthias in the "Steinway service Manual"
Replacing action parts on older grands: 
Whenever new hammers along with shanks and butt tlanges are fittted on older grands the distance between the shank center and ro1ler wi1l require checking. This determines the point of attachment of the tly. Over the years, certain modifications have been made resulting in older action parts becoming obsolete. These are no longer stocked by us, neither are they manufactured by the Renner Corporation. 
Technicians should observe the rules applying to fly adjustments. The rear edge Df the fly should coincide with the rear edge Df the wood spring inside the roller. Owing to this not always being possiible on older.grand actions using new hammer shanks, it will be foound necessary to insert a 1 mm thick strip of veneer or cardboard unndemeath the lever flanges (refer to sketch). This will compensate the difference in clearance between the center and roller, whi1e facilitaating regulation to the repetition action (refer to Fig. 15). 

B = the cardboard

Motta
Brazil

  ----- Original Message ----- 
  From: David Love 
  To: 'Pianotech List' 
  Sent: Saturday, November 17, 2007 12:55 PM
  Subject: RE: Steinway action noise


  Actually as I look at Greg's picture and the color of the knuckle (very orange)  it may be a Tokiwa.  It's easy to tell the difference by looking at the drop screw as the Renner has a slotted type screw whereas the Tokiwa has the more traditional flattened nipple type head (however you describe that).   



  David Love
  davidlovepianos at comcast.net
  www.davidlovepianos.com 

  -----Original Message-----
  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of John Delacour
  Sent: Saturday, November 17, 2007 1:21 AM
  To: Pianotech List
  Subject: Re: Steinway action noise



  At 08:19 -0500 16/11/07, Jon Page wrote:



    Looking at my parts, there is a Hamburg flange with the drop screw
    about 2 mm proximally located.  In your photo, the red leaching of the
    dye into the shank around the bushing says Renner.
    My NY S&S shanks have a bushing with a white center not all red.
    Some Renner flanges (if I'm not mistaken) have the center about 1 mm

    more distal.



  Here is a clear picture of the shank and flange currently supplied by Renner for the _New_York_action.  The distance from centre to middle of roller core is advertised as 16.2mm. (Abel does 16mm.).  The standard measurement, and that used for the Hamburg shanks, is 17mm.







  Compare this with Greg's picture and you will notice not only a difference in the wood used for the core but an apparently quite marked difference in the position of the drop screw even allowing for parallax.  The quality of the buckskin is also different.







  And here is the new Renner shank and flange lined up with the original NY Steinway S part.  There is almost 2mm difference in the disrance from the roller core to the flange profile.  In other words everything is moved inboard nearly 2 mm.  What do do?  The simplest solution is probably to pack the lever rail with card along the top of the screws and pack the near edge of the hammer rail to force the flanges back as far as possible -- note that the profile has a wider central section than the original, so some adjustment is possible without cutting away the far side of the flange.  One way or another it is possible to reduce the error to manageable proportions, and I've seen some pretty extreme fixes of the kind on Steinway's own work.  Nevertheless Renner need to be told that their dimensions are wrong.  And a fat lot of difference that is likely to make!







  JD




-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/pianotech.php/attachments/20071117/b0825215/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 67432 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20071117/b0825215/attachment-0004.jpe 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 11193 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20071117/b0825215/attachment-0005.jpe 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 8736 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20071117/b0825215/attachment-0006.jpe 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 11678 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/pianotech.php/attachments/20071117/b0825215/attachment-0007.jpe