Loose damper tray

[Roger Jolly]

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Hi Phil,
               Use a sharp pencil and make a line along the belly rail, at 
the  top of the damper up stop rail,   Loosen the up stop rails screws 
and  raise the rail as far as you can just snug the screws to hold the rail up.

This will give you plenty of room to tighten the tray screws.

Reset the rail to your pencil lines. check the rail/up stop 
regulation.  there should be 2mm clearance from the bottom of the tray to 
the felt on the top of the dags, Adjust the pedal rod to make sure this is 
correct,  and 1mm of lost motion to the underlever capstans, check to make 
sure all dampers lift evenly.

Depress several sample keys so they just rest on the front rail punching's 
, You should be able to  lift the damper head 2mm up wards. This is an 
important adjustment.
  If too much travel, the action will feel bumpy, if too little it can feel 
spongy.

A good flash light makes the job a bit easier.

Hope this helps

Regards Roger



At 04:31 PM 11/19/2005, you wrote:
>Came across a Yamaha C7 aluminum damper tray that was making noise.  It 
>was loose and moving forward  and backward due to a loose screw on the 
>left flange.  Problem is I can't tighten the flange screw since the damper 
>tray hinge is covering it and I can't lift the damper tray high enought to 
>get at them..  How can one tighten the hinge screws without removing all 
>the damper wires, back action etc.  Can anyone help?
>
>Phil Ryan
>Miami Beach
>_______________________________________________
>pianotech list info: https://www.moypiano.com/resources/#archives

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