jack slides out before delivering power

[Isaac Sadigursky]

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Hi,julia again! please,check center pinning on those jacks{and sometimes,other parts}A lot of baldwins are notorious for that problem. center pin is tight in the post flange bushing and marginally loose in the birds eye of the jack,it heats up and becomes sluggish..i had the whole 1.5 hour class on that subject at the past convention..it t can be that problem.. good luck! happy thannxgiving!


----- Original Message ----- 
From: 
To: pianotech@ptg.org
Sent: 11/22/04 8:52:04 PM 
Subject: jack slides out before delivering power


Greetings, 

             Working on a Hamilton built by Baldwin studio upright today, I noticed that  on a reallly soft blow to the key, the jack wants to slip forward almost to the back of the catch's shank, instead of delivering the kick to the base of the hammer butt.

             The customer complained that, on a soft blow the key wouldn't play and would sort of jam. Looking at this situation I saw that the jack would sometimes just slip out too much forward and not deliver its power. What would cause this? Could the keys not be levelled high enough?

Julia Gottchall,
Reading PA  
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