[pianotech] lubricating damper springs?

[John Ross]

Could it possibly be the damper rod hinges that need lubricating?
John Ross
Windsor, Nova Scotia, Canada
  ----- Original Message ----- 
  From: Gregor _ 
  To: pianotech at ptg.org 
  Sent: Tuesday, May 12, 2009 9:49 AM
  Subject: [pianotech] lubricating damper springs?


  List,

  I have a problem with annoying sounds when depressing the right pedal of an upright very slowly. It turned out that it comes from the dampers or the rod that lifts the dampers. Usualy I fix it with lubricating the springs and the rod and the hinge-joints of the rod. But in this case it did not help. The spings are not embedded in felt or leather but in graphitated wood. I used stag fat for the dampers and the rod, which usualy helps allways (for the hinge-joints I used Protec CLP). Was that a mistake instead of using graphit for the spring embedding? I mean, if new graphit were the only way to solve such a problem, then a future application of graphit could be hindered by the fat on the springs. But I am not shure about that.

  Any ideas about the source of these sounds and the solution of that problem? It´s an Ibach C upright from 1986 with a Renner action. It seems that the bass dampers are the main culprits.

  Gregor


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