Installa on Procedure
21
July 2013
Installing the Sustain Pedal Solenoid
‐
Grand...
You
can
now
turn
your
a en on
to
the
installa on
of
the
sustain
pedal
solenoid
assembly.
This
procedure
is
not
required
when
sustain
pedal
is
not
installed.
Because
there
is
a
certain
amount
of
varia on
in
the
architecture
of
grand
pianos,
you
will
probably
have
to
custom
‐
tailor
the
following
direc ons
to
suit
the
mechanical
dimensions
of
the
par cular
instrument
you
are
working
on.
The
key
elements
to
focus
on
here
include
the
sustain
pedal
lyre
rod's
upward
projec on
onto
the
keybed
immediately
above
it,
the
loca on
of
the
large
hole
through
which
the
original
sustain
pedal
pitman
dowel
projected
to
reach
its
corresponding
hole
in
the
wooden
or
aluminum
damper
tray
(which
li s
all
of
the
piano's
dampers
simultaneously),
and
the
rearmost
OUTSIDE
ver cal
wall
of
the
keyboard
compartment,
called
"the
belly
rail."
The
proper
installa on
of
the
sustain
pedal
solenoid
assembly
takes
into
account
the
dimensional
rela onships
of
these
three
elements.
In
addi on
to
providing
for
both
the
manual
and
automa c
opera on
of
the
piano's
dampers,
you
want
to
give
the
sustain
pedal
solenoid
as
much
mechanical
advantage
as
possible
in
order
to
minimize
the
power
required
to
ac vate
it.
Despite
the
excellent
design
of
the
sustain
pedal
solenoid
assembly,
its
long
term
opera on
depends
upon
your
skill
in
loca ng
the
various
leverage
‐
points
which
enable
it
to
func on
both
manually
and
auto
‐
ma cally.
Op mally,
the
sustain
pedal
solenoid
assembly
will
be
mounted
on
the
belly
‐
rail
immediately
behind
the
sustain
pitman
dowel
which
formerly
con
‐
nected
the
old
trapwork
lever's
far
end
to
the
damper
tray
in
the
keyboard
compartment.
This
arrangement
provides
the
shortest
distance
between
the
sustain
pedal
solenoid
assembly's
lever
‐
arm
and
the
load
imposed
by
the
damper
tray
through
the
pitman
dowel.
Where
such
a
situa on
exists,
you
will
use
the
four
moun ng
holes
to
locate
the
four
#10
x
1"
panhead
screws
used
to
secure
the
pedal
solenoid
to
the
belly
‐
rail.
If
the
belly
rail
is
too
close
to
the
pitman
dowel,
locate
the
solenoid
on
a
frame
member
or
on
an
extension
a ached
to
the
frame
member.
Now,
measure
the
distance
from
the
center
of
the
pedal
solenoid's
pusher
p
to
the
exact
center
of
the
damper
tray's
pitman
rod
loca on.
Sixty
per
‐
cent
(60%)
of
this
distance
FROM
THE
PEDAL
SOLENOID'S
CENTER
(that
is,
the
lion's
share
of
this
distance)
is
the
loca on
of
the
fulcrum
of
the
trap
‐
work
assembly's
straight
bar.
The
remaining
40%
of
this
distance
becomes
the
minor
por on
from
the
fulcrum
to
the
pitman
dowel.
Summary of Contents for PMII
Page 26: ...Installa on Procedure 26 July 2013 Installing the Steinway Sostenuto Assembly Order 70897 ...
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