Sostenuto regulation

[Newton Hunt]

Ok, I dug this out of my "sent" folder.

Look it over and if you have any further questions just write.

Check for excessive movement of the sos. blade in it's bushings. 
Re-orient the cloth or replace it as needed.

The best procedure is:
1       Regulate the timing of the dampers.
        The tabs should be in a straight line horizontal and vertical.
2       Set damper lever block so pedal raises dampers to the same
height as
	sharps.
3       Set damper up stop rail so there is some up motion left for
the
	dampers to prevent jamming.
4       Set the sostenuto blade so it is 45 degrees off horizontal
5       Set the height of the blade TIP to the height of the sostenuto
tab
	TIPs exactly.
6       Do this at each section end.
7       Check that there is no fore and aft slop in the keyblock
action
	retainers.
8       Work the sostenuto pedal several times to see if dampers flick
or
	move upward.
9       If dampers do tap the sos. brackets so the blade is moved
toward the
	keys.
10      Repeat until all dampers are not touched.
11      Check that the sos. raises the dampers just slightly higher
than
	the keys.  Stop block under the keybed.
12      Adjust the sos. lever stop accordingly.
13      Depress the sustain pedal the sos. pedal and see that all
dampers
	are held up.
14      Tap the tops of the damper blocks to see if any fall through.
15      Move sos. brackets away from the keys until all are held
securely.

You will need pliers to bend the brackets, a small hammer to move the
brackets in and a drift to move them out, a means of determining sos.
tab height and compare it to the blade tip height (critical to
functioning)  S&S has a tool for this but gave confusing instructions
so do it my way and it will work.

Have a nice weekend all.,

		Newton