Inspection And Servicing (Spark Plug) - Raytheon BEECH BARON 58P Maintenance Manual

BEECHCRAFT
BARON 580 AND BARON 58TC
MAINTENANCE MANUAL
CAUTION
Ventilating air
passes
through the heater between the
jacket
and combustion tube assembly
outer
surface and through
Do not
use an
ordinary
steel brush,
as
it
will
an
inner passage in the assembly. Consequently, ventilating
cause
corrosion
in the
chamber and radiator,
air
comes
into contact with two
or more
heated, cylindrical
surfaces.
b. Clean
individual metal
parts
(except the
combustion tube and
jacket assembly and those
parts
VIBRATOR REMOC/AL
containing
electrical
components) by immersing them in
PD680 solvent (15,
Chart
207, 91-00-00). Use
a
soft bristle
a´•
Remove the
nose
baggage compartment access
I
brush
to
assist the cleaning
process
if
foreign accumulations
panels (TJ-3
thru TJ-228
except
TJ-210)
and floorboard (TJ-
are
stubbom to
remove.
Allow
parts to
dry thoroughly.
210,
TJ-229 and after),
to
reach the
ignition
unit
on
the
heater assembly.
CAUTION
NOTE
Do not
attempt to
buff
or
scrape off any deposits
on
the face of the spray noule. The face of the
Measure the distance the vibrator
protrudes out
nozzle is very
susceptible to
damage from
of the
ignition assembly
to
determine when
a
mishandling.
new
unit is inserted
properly.
c.
Wipe
electrical
components with
a
clean,
dry
b.
Grasp
the vibrator and with
a
slight
back and forth
cloth. If foreign
material is difficult
to remove,
moisten the
movement,
pull it straight out
of the ignition unit.
cloth with electrical contact cleaner.
Clean all exterior
surfaces of
parts
thouroughly.
d.
Dust,
etc., should
be removed from switches by
NOTE
wiping with
a
clean cloth
or
blown off with compressed
air.
For
a
friction grip, it may be necessary to
use a
piece
of masking
or
friction
tape
around the
HEATER IGNITION
exposed portion of the vibrator.
(Figure 201)
The controlled atomized spray
from
a
specially designed
VISFIATOF~ INSTALLATION
spray
nozzle, coupled
with
high-voltage spark plug
ignitionensures instant
firing
and continuous buming under
a.
To install
a new
vibrator,
carefully rotate the
new
all flight
conditions. Heat is
produced by buming
a
fuel-air
vibrator until the index marks
are
aligned and the connector
mixture in the
combustion chamber
of the heater. Aviation
pins
on
the vibrator
can
be felt entering
the pin
sockets in
gasoline is
injected into the
combustion chamber through
the vibrator
socket,
then press the vibrator fully and
firmly
the spray noule. The
resulting cone-shaped fuel spray
into position.
mixes with
combustion
air and is
ignited by
a
spark
from
the
b.
Check
the heater for operation
and close all
spark plug.
Electric
current for ignition
is supplied by
an
access
openings.
ignition
unit which converts 24 volts
to
a
high-voltage,
oscillating cunent to
provide
a
continuous
spark
across
the
spark plug
gap. A shielded, high voltage
lead connects the
INSPECTION AND
SERVICING
(SPARK PLUG)
ignition assembly to the
spark plug. Combustion air enters
(Figu~e 202)
the combustion chamber tangent
to Is
surface and
imparts
a
whirling
or
spinning action to
the air. This produces
a
If the spark plug
appears
to
be in good
condition,
except
for
whirling
flame that is stable
and sustains combustion under
a
mild coating
of oxide
on
the
porcelain and electrodes,
it
the most adverse
conditions
because it is whirled around
may
be
cleaned and reused.
Cleaning is
accomplished with
itself many times.
Ignition
is continuous and the combustion
a
conventional airplane
type
spark plug cleaner, except
that
process is
self-piloting. The
burning
gases travel the length
it will be
necessary
to
use
two
6r more
adapters in order to
of the combustion
tube,
flow around the outside of the inner
raise the long
extension of the plug
far enough
out
of the
tube,
pass
through
cross-over
passages into
an
outer
cleaner noule opening
to
provide
an
effective job. Plug
the
radiating
area,
then
travel the
length
of this surface and
out
ceramic insert cavity at
the terminal
end of the plug
with
a
the exhaust.
piece
of paper
or
cloth
to
keep
out any of the cleaning sand.
21-4000
Page 203
Mar 21/80