Raytheon Beech Baron E55 - Page 490

BEECHCRAFT
BARON
55 AND
58
SHOP
MANUAL
2.
Reattach
the
connector
to
the
solenoid,
insert
b.
Tavco
Control Valve
Instnll3tion.
the
he’x
actuator
pin
into
the
solenoid,
and
actuate
the
deicer
switch. If
the
pin
is
not
ejected
from
the
solenoid,
replace
the
After
each 100
hours
of
engine operation,
remove
the hirer
control valve.
cover
on
each control
valve
ctss,-mbly
to
disposr
of
oil
in
the filter.
Air
Leakaee
Test
Control
Valves
a.
Cap
the
overboard
port
of
the
control
valve in
either the
left
or
right
nacelle.
a.
Goodrich
Control
Val~´•e
b.
Connect
a
source
of
clean
air
to
the
inlet
port
of the
capped
control
valve.
A
minimum
inlet
pressure
of 18
to
20
After
approximnrely
100
hours
of
engine
operation.
the
~.3lvr
psi,o
is
required
for
the
test,
poppet
and
internal
lininy
of
the
control
v3l~e
become
c.
Install
a
pressure
gage
in
the
air
line
to
observe
coated with
(1
film
of dried
oil,
causing
the
valve
poppet
to
system
pressures,
stick. To
determine
if the valve
poppet
is
sticking,
perform
d.
Apply
18
psig
pressure
to
the
system
and,
with
a
the
checks outlined
in
System
Checkout,
Control
L’rtlves.
If
hand
operated
valve,
trap
the
pressure
in
the deicer
system,
the
solenoid
ejects
the
hes
actuator
pin
(Step
c.
2).
proceed
as
e.
Observe
the
system
for
leakage;
the
leakage
rate
follows:
should
not
exceed
a
pressure
drop
of
4.0
psig
per
minute.
i.
Remove
the
solenoid
elr´•ctric´•:ll c´•or?nr´•c~ror.
f.
Remove
the
test
equipment,
lubricate all
threads,
7.
Rrmo~´•e the
valve
poppet.
and
replace
all
system
components.
Vacuum Relief
Valve
Adjustment
NOTE
For
proper
operation
of
the deicer
system
the
airplane
It
may
be
necessary
to
appl-
slim
nest:
pliers
to
vacuum
relief valves
must
be
adjusted
to
provide adequate
the
pin
projection
in order
to
pull
the
PoPPt~l
~rom
vacuum.
See
Vacuum
System.
this
Section.
if
adjustment
is
the
valve.
required.
CHECK
3.
Thoroughly
clean
the control
\´•al\s
bore
and
poppet
with
a
commercial
hydrocarbon-t)ps
~olvrnr.
a.
With
bath
engines
operating
at
cruise
rpm,
-t. Reassemble the
valve and reinsrall
und
momentarily
place
the deicer
switch
in
the
AUTOMATIC
the solenoid.
position;
the
deicer
boots
should inflate
forfive
to
eight
seconds,
then
deflate
and
reach
a
vacuum
holddown
b.
Tavco
Control
Valve
Xssembl
condition.
During
inflation,
check
to
see
that
system
pressure
is
within the
green
are
on
the deicer
system
pressure
gage.
Sticking
of the
valve
poppet
may
be
caused
by
a
film of dried
b.
Place
the deicer switch
in
the
MANUAL
position
oil
on
the
poppet
and
the interior
of
the
valve.
The valve
mt!
and hold for
a
few
seconds;
the
deicer
boots
should
inflate
be
cleaned
as
follows:
and remain
inflated
while
the switch
is
retained in
the
I.
Disconnect
the
valve assembly
and
remove
it
MANUAL
position.
Check
for
correct
system
pressure.
from
the
airplane.
c.
Release
the
deicer
switch,
permitting
it
to return
to
Force
a
commercial
hydroc~rbon-tptl
the
OFF
position;
the
deicer
boots
should deflate
and
reach
a
solvent
into
the
inlet
port
of
the val\´•c:
assemhllY
while
vacuum
hold-down
condition.
operating
the solenoid
several
limes.
d.
Repeat
Steps
"a"
through
"c’’
with each
engine
operating
individually
at
cruise
rpm.
COMPONENT
MAINTENANCE AND
REPLACEMENT
WARNING
Air Filters
Observe
the normal
saf~tS’
precautions
required
for this
type
of
operation.
a.
Goodrich Control
Valve
Installation.
3. Reinstall
the
valve
assrmbl~´•.
Examine the
filter
discs
after
each
100 hours of
engine
operation
and
clean if
oil
has
accumulated
in
the
filter
Timer
housing.
For
a
cleaning
agent
use a
commercial
hydrocarbon
type
solvent
such
as
naphtha,
petroleum
ether,
or
gasoline;
The
timerconsists
of
a
holding
relav and
a
time-delav
kerosene-type
distillates should
be
avoided.
Defective
components may
be
replaced
as
required.
11-10
EtO