Squeak in unacorda of S & S, B

[John Ross]

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I took a look, and couldn't see anything that jumped out at me.
Tried some lubricant on the lever to no effect.
As I said, the only time I noticed a loss of squeak, was when I tefloned the right hand glide, but just for one movement of the pedal.
I raised the glide, between 1/8 and 1/4 of a turn, and the squeak was gone.

My question was, has anyone else had this problem, and what is the proper fix. There was a slight squeak still there, and it went away, when I raised the left hand glide 1/8 of a turn.

With the concert coming up, I didn't have time to investigate further.

This was an S & S, model B, less than 6 months old, and it was the first time I had seen it. I don't know, who had done the prep, but I do know that they went to Steinway, New York to pick it out.
Regards,
John M. Ross
Windsor, Nova Scotia, Canada
jrpiano@win.eastlink.ca
  ----- Original Message ----- 
  From: Horace Greeley 
  To: Pianotech 
  Sent: Sunday, March 13, 2005 8:30 PM
  Subject: Re: Squeak in unacorda of S & S, B



  John,

  When you have a chance to pull the keyframe, look to see if the trailing edge of the unacorda lever is digging into the bottom side of the cutout on the keyframe.  That is, when at rest the top of the lever is (nominally) parallel with the keybed (well, OK, it's supposed to be); and, there can be exceptionally little clearance between it and the underside of the keyframe cutout.  The problem is that, as the lever pushes the keyframe the treble end, the bass-side edge of the lever describes an arc which is going to go slightly above the line of the lever at rest.  The fix is either to radius off that edge of the lever and/or increase the depth of the cutout.

  We saw this a good deal with they were moving from the PR keyframes to the Kluge ones (the latter, being much more flexible, at least during that time of production, were much less forgiving of things like this.

  Best.

  Horace


  At 10:20 AM 3/13/2005, you wrote:

    One of the first places I went.
    John M. Ross
    Windsor, Nova Scotia, Canada
    jrpiano@win.eastlink.ca

      ----- Original Message ----- 

      From: David Love 

      To: 'Pianotech' 

      Sent: Sunday, March 13, 2005 2:05 PM

      Subject: RE: Squeak in unacorda of S & S, B


      Did you lubricate the spot where the una corda iron contacts the key frame?  




      David Love

      davidlovepianos@comcast.net 

      -----Original Message-----

      From: pianotech-bounces@ptg.org [ mailto:pianotech-bounces@ptg.org] On Behalf Of John Ross

      Sent: Sunday, March 13, 2005 9:34 AM

      To: pianotech

      Subject: Squeak in unacorda of S & S, B



      Hi List,

      I was wondering if any of you have run/ran into this problem.

      It was a S & S model B, less than 6 months old. It is the first time I have seen it, and I got a call yesterday afternoon, wondering if I would have a look at a squeak problem, before a concert this afternoon.

      So I went this morning, (extra charge of course).

      I thought it would be an easy fix. But, noooooo.

      I checked all the obvious places, regraphiting any worn areas, tefloned and MPL'd appropriate spots.

      Still there.

      Tried pushing shift lever by hand, still there.

      Not the spring on the right side, that bears on the action.

      Tried moving the action toward me, a smidgen, no squeak.

      Couldn't find anything wrong at the dags.

      Then I tried lifting the action at the right side just a smidgeon, gone again.

      I turned the glide bolt back 1/8 to 1/4 of a turn, most of it gone, but still some at the other end, but very slight, turned left glide bolt up less than 1/8 turn.

      Squeak gone.

      Not enough time before concert to get into it more fully.

      Have any of you ran into this causing a squeak?

      Is there a proper fix, that I should go back and do?

      Thank you.

      John M. Ross

      Windsor, Nova Scotia, Canada

      jrpiano@win.eastlink.ca 

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