Riddle Anyone?

[Jim]

The repetition lever flange pin was very tight.

Jim Coleman, Sr.


On Tue, 3 Dec 1996 A440A@aol.com wrote:

> Greetings all,
>
>      It was one of those great days,  a fellow tech had called for advice on
> the Yamaha action he was trying to regulate, after he  had spent three days
> trying everything to make it work, and no luck.  He brought it over to my
> shop so we could both figure on it.  I found the problem by the time he came
> back in from the car. (Sadly, not through brilliance, but I had spent some
> time earlier on the identical problem, so knew where to look).
>
> 1.  Yamaha G-2,  approx 10 yr. old
> 2.  heavily filed hammers, but not at all past usable
> 3.  Tefloned and bolstered knuckles, ( he had put several strips of yarn
> through each).
> 4.  Pinning was fairly loose, but not wobbly
> 5.  all felts,  balancier (repetition lever),  adjustment, drop leather, etc.
>  were in good shape
> 6.  graphited surfaces in good condition
>
> Problem:
>
>       Excessive spring pressure was needed to return the jacks,  and even
> then excessive height on the balancier was required, and several notes would
> skip.
>       When the action train was set to the factory nominal specs, there was a
> profound loss of repetition.  Only when the spring was set quite strong, and
> the mortise was at least .015 above the top of the jack, would the piano
> repeat well enough, but it felt terrible!!
>
> Clues:
>
> 1.  He did a beautiful job of filing hammers and bolstering the knuckles,
>  aside from that and turning the adjustment screws, he had done nothing else
> in the action.
> 2.  The action was all factory original, rails were in the proper place
> 3.  The repair required two hours and when finished, there was approx. 200%
> more rep. spring tension, (hammers flew!)
> 4.  The spring groove, (grub) was well lubricated
>
>
>
> Riddle:  What was the repair that made all the difference?
>
> Oh yeah,  it is a church piano....
>
> If the list doesn't care for this type of quiz, lemme know.
>
>
>
> Ed Foote
> Precision Piano Works
> Nashville, Tn
>
>
>