[pianotech] Sluggish action on Wurlitzer

Isaac Sadigursky irs.pianos at earthlink.net
Tue Nov 18 20:31:09 PST 2008


Hi,John!  Can you clarify what is "VS Profelt"???????? Thanx   isaac
On Nov 18, 2008, at 7:37 PM, John Formsma wrote:

> On Tue, Nov 18, 2008 at 7:09 PM, Greg Newell <gnewell at ameritech.net>  
> wrote:
>
>        Best course of action? Depends. Do you want it to last? Do  
> you want
> a reputation for excellence? Repin them.
>
>
> I agree with Greg.  A lube is not going to fix major friction  
> problems.  I've run across several Wurlies with high friction in  
> hammer, wippen, and jack centers.
>
> Before repinning, you might do a couple things:
> Push a few problem center pins out to see if they have "crud" on  
> them.  If so, you probably want to repin.
> Size the problem centers with a solution of alcohol and water.   
> Begin with 10% or 25% water and the rest denatured alcohol. Put 2-3  
> drops on a few centers, and leave them overnight (or under a warm  
> lamp for a couple hours).  And be sure to "exercise" the centers  
> after the sizing.
> If the alcohol/water sizing doesn't work, you could use a higher  
> concentration of water.  If that doesn't work, you'll have to repin  
> as needed.  And I'd allow plenty of labor, because you're likely to  
> repin most of the hammers and wippens.  I would remove all hammers  
> and wippens, and check the friction on each one (along with the  
> jack).  And while you're at it, renew the key bushings with VS  
> Profelt if they look cupped.  That will only take a few minutes, and  
> it works well.
>
> -- 
> JF

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