[pianotech] stuck keys after one hour of playing

[John Ross]

I found that removing the action, and doing a swing test, pointed out the culprits.
Swing test, is remove action, point hammers at the floor, and swing action. The hammers have  different rates of swing. 
Repair the bad ones.
John Ross,
Windsor, Nova Scotia
  ----- Original Message ----- 
  From: Dean May 
  To: pianotech at ptg.org 
  Sent: Wednesday, April 01, 2009 10:15 AM
  Subject: Re: [pianotech] stuck keys after one hour of playing


  Hi Barbara

   

  I used to sell Young Changs. I saw the exact symptom lots of times and it was almost always a tight hammer center. My quick test is to pull the action, lift the hammers to vertical, then push them down gently until they fall from gravity. They should drop when you get to about 75 degrees, but likely you'll find several that won't drop with the rest. If they are really tight they will just drop slow. 

   

  Dean

  Dean May             cell 812.239.3359 

  PianoRebuilders.com   812.235.5272 

  Terre Haute IN  47802


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  From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of Barbara Richmond
  Sent: Tuesday, March 31, 2009 6:01 PM
  To: pianotech
  Subject: [pianotech] stuck keys after one hour of playing

   

  Howdy,

   

  I just got a call from a fellow who has an almost 10 year old Wurlitzer grand (I think it was made by Young Chang--correct me if I'm wrong.).  He said he's been having some trouble with keys starting to stick <after> he's been playing for a while--like an hour--and then they just won't go.  We've made an appointment for me to come out and have a look.  I will check the action centers & keys for friction levels, of course, but this seems sort of unusual--well, I've never been witness to such behaviour, anyway.  Has anyone else experienced such symptoms?

   

  Thanks,

   

  Barbara Richmond, RPT

  near Peoria, IL
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