[pianotech] sticky keys...thanks

[Ursula Hammerling]

Thanks John and Tom for your advice on the key and balance rail bushings and the
hammer return spring thread, David. I think I will be in for a fun day.

Ursula 

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--- On Sun, 1/30/11, John Formsma <formsma at gmail.com> wrote:

From: John Formsma <formsma at gmail.com>
Subject: Re: [pianotech] sticky keys with depressed sustain pedal
To: pianotech at ptg.org
Date: Sunday, January 30, 2011, 3:25 PM

I'd also agree that this is caused by the usual suspects.
However, I'd alter the order slightly from what Tom wrote. First, you might want to first check the BR (and FR key bushings) before easing the balance hole. Sometimes a tight BR bushing can mimic a tight balance hole. (I recently looked at a piano with excessively eased balance holes. The real problem was in the BR bushings.)

And, definitely check the balance holes and key bushings first before easing. Don't assume they all will need easing. I'm sure Tom does this -- but maybe just didn't think about mentioning that as part of the list.

--JF

On Sun, Jan 30, 2011 at 9:43 AM, Tom Driscoll <tomtuner at verizon.net> wrote:





Ursula,
    You are correct in that is typically the "usual " suspects. 

  The order is important as you can over ease the balance key bushing and still have problems if the balance hole is too tight.

  
   Remove ALL the keys not just the offenders .( Might as well remove the action first since it's so easy) 

   Clean and lube the keypins.

   Ease all balance holes with the  CF tool or it's equivalent

   
   Ease balance rail key bushings

   Ease front rail key bushings

All this assumes that whippen cushions are not worn, capstans are clean and smooth ,centers are free etc .

If you only correct the offenders you will be back for more at some point.

Best wishes, 
 Tom D 


Jan 30, 2011 10:28:01 AM, pianotech at ptg.org wrote:

Hi list,
On an Asian grey market piano about 30 - 40 yrs. old, there are several sticky keys when the sustain pedal is depressed. What would I have to look for other than the usual sticky key problems? Your comments are appreciated.




















      
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