Heintzman console jack return problem.

[Douglasmahard@AOL.COM]

Hi all,

Heintzman console with jacks not fully returning under hammer butt.  The keys 
are weighted/balanced such that the lost motion is taken up on most keys.  On 
my experimentation key (middle C) I added a key weight which allowed me to 
feel the lost motion, but the jack still would not return when letting the 
key rise slowly.  Next I installed a new jack spring with no improvement of 
jack return.  I also checked the profile of the butt leather and it looked OK 
to me.  Graphited the top of the jack also.

I would appreciate any insight.

Thanks and have a great weekend.

Doug Mahard