Raytheon Beech Baron E55 - Page 493

BEECHCRAFT
BARON
55
AND
58
SHOP
MANUAL
(b)
With the
valve
shaft
actuated
and
locked
PNEUMATIC
PRESSURE
SYSTEM-INSTRUMENT~
j
in
the
detent,
the control
arm
is
properly
adjusted
only
when
(TE-452
and
after;
TH-1
and
after;
TC-2003
and
the
"dog"
which
operates
the valve
shaft
will:
after)
(1)
Engage
1/64
to
1/32
an
inch
on
the
shaft
and
then:
NOTE
(2)
Slide
past
the
shaft
without
driving
the shaft
beyond
and
out
of
the
detent.
Airplanes
with
four
(or
more
air-driven
~>ros
(C)
The
adjustment
of
the mechanism is
and
an
air-operated
autopilot
installej
should
be
accomplished
by
loosening
the fasteners between
the
equipped
with
high
capacity
air
pumps
to
previously
described
upright
and
angle.
then
adding
or
operate
these
components
in
the
event
of
removing
laminated
shim
stock,
single-engine
operation.
4
pump
of
the
same
capacity
must
be used
as
a
replacement.
If
the
"dog"
engages
too
far
on
the shaft
or
drives the
shaft
past
the
detent,
add shims
until
the
mechanism
is
properly
adjusted.
If the
i’dog"
does
not
cause
the valve
shaft
to
engage
in the
detent,
remove
shims
until
the
valve
shaft
engages
in the
detent
satisfactorily.
The
pneumatic
pressure
system
supplies
air
to
operate
!t~e
pressure-driven
instruments
and
iit’
installed)
the
iieics and
(d)
The
valve
operating
mechanism
and
autopilot
systems.
Pressure
system
operation
is
b~´•
air
int~ie
valve should be
functionally
tested with
pressure
from
the
through
the
ambient
air
(foam
rubber)
filters
located
reservoir
package.
of
11~e
rear
engine
baffle
on
each
enpinr.
Tl?e
filtered ;lir
is
then
passed
through
the
two
engine-dri\en
dry
air
pumps
:o
2.
Cycling
Valve
Adjustment.
the
pressure
regulators
located
on
the
topside
of each
nac´•ells
(a)
The
valve
is
properly
adjusted
when
the
at‘t
of
the
firewall.
The
regulators
reduce the
pressure
of
the
low
pressure
gage
on
the
regulator
reads
15
to
17
psi
at
the
air
from
the
pumps
to
3
preset
level
then
pass:
it
on
through
3
time
the valve
shaft
autumrtticallv
returns
to
its
normal
pair
of inline
system
filters
to
a
pressure
manifold.
The
position,completing
the
deicing
cydle.
This is
known
as
the
pressure
manifold
is
located
aft
of
the
front
spar.
behind the
’’pop-off’’
pressure.
The
low
pressure
gage
on
the
regulator
upholstery
panel
in
the
LH
sidewall.
Air is
then
distributzd
will show
a
higher
value after
the valve
completes
the
deicing
from the
manifold
forward throurh
In
adjustable
orifice
cycle. This
higher
value is
the
set
pressure
of the
regulator.
(TE-152
thru
1E-767)
or a
rz´•ul~tor
valve
(TC-~001
and
(b)
The
value
is
adjusted
by
rotating
a
ring
after;
TE-768
and
after,
TH-
I
and
after)
to
the instrument
on
the valve located
directly
below the
top
plate
on
the
panel.
Xir is
plumbed
off the
manifold
to
operate
(i
f
installed)
working
end
of the
valve.
The
cam
action
of
the
interior
of
the
deice and
autopilot
systems.
this
ring
increases
or
decreases
the
’’pop-off’’
pressure
as
the
ring
rotates.
(c)
To
adjust
the
"pop-off"
pressure
of
the
PRESSURE
SYSTEM
INTAKE
(AMBIENT)
AIR
FILTER
valve:
REPLACEMENT
(1)
Remove
the
cotter
pin
locking
the
adjusting
ring
to
the valve
body.
The
intake
filters
an
located
on
the
forward
side
of each
(7)
Cycle
the
valve
and
observe
the
engine
rear
baffle.
The
foam
type
should
be
removed each
"pop-off"
pressure
on
the
low
pressure
gage
of the
100
hours
(or
sooner
depending
upon
conditions)
and
washed
regulator.
in
solvent
and
blown
dry
with
low
pressure
shop
air.
On
(3)
Rotate
the
adjusting ring,
recycie
serials TE-9j7 and
after.
TC-2003
and
after,
TH-I:j
and
the valve
and
again
observe
the
"pop-off’’
pressure,
after and earlier
airplanes
which
have
complied
with
(3)
Determine
from
the
"pop-off"
BEECHCRAFT
Service
Instruction
No.
0551-L93.
the
pressures,
the
direction of
the
adjusting
ring
to
increase
or
intake
filters
(Fi@ure
1
I-S)
should
be
replaced
annually,
decrease the
"pop-off"
pressure,
every
300
hours
(or
sooner
depending
upon
conditions) or
(5)
Set
the
adjusting
rino
on
the
valve
whichever
comes
first.
This
filter
element
should
not
be
so
that the
"pop-off"
pressure
is from
15-17
psi.
subjected
to
solvent
and
must
be
replaced
if this
occurs.
(6)
Relock the
adjusting ring
to
the
Always
reinstall
the
filter
cover
with
the
opening
facing
valve
body
with
the
cotter
pin,
down.
El~
11-13