[CAUT] M & H model 50

[Wimblees@aol.com]

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In a message dated 1/15/2006 12:23:47 A.M. Central Standard Time,  
abousel@comcast.net writes:

There is  a Mason & Hamlin upright model 50 (vintage 1975) I service and at 
the last  tuning the owner was complaining about bobbling hammers. The hammer 
pinning is  very loose. I played around with the note that was bothering her 
the most and  through a combination of repinning and strengthening the hammer 
return spring  was able to all but eliminate the problem. The piano is in good 
regulation.  Here's the issue: The action is really poorly made. 1975 was not 
exactly the  golden age for these. In repinning the one I did, I could see that 
the flange  bushing cloth was poor quality. It would be wonderful to replace 
the whole  action, but that's not going to happen. Does anyone know if it's 
possible to  get replacement hammer flanges? These flanges are different from 
the generic  ones sold by piano supply houses. If that's not possible, I have to 
go with  rebushing what's there. Any recommendations on a good source of 
flange bushing  cloth? I know M&H are making these again. Anyone know if the 
action design  is the same?

thanks,
Aaron




Aaron. 
 
The problem might not be in the flange pinning. You need to figure out why  
it is bobbling. It could be that there is not enough key dip. Even taking out a 
 .005" punching is sometimes enough to make a difference. Also check the  
condition of the catcher. Roughing it up a bit will give the back check  
something to grab a hold of. Try pushing the back check forward or back a  little, and 
see if that will get it to check better. 
 
Wim 
Willem Blees  RPT
Piano Tuner/Technician
School of Music
University of  Alabama

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