Raytheon Beech Baron E55 - Page 445

Raytheon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
CLEANING
THE HEA
TER
a.
Cleaning
the
combustion
chamber and radiator
assembly
can
be
accomplished
using
either
of
the
two
following
I
methods:
1.
Soak
the
combustion
chamber and radiator
assembly
in
a
stripper
solution
for
10 hours.
The
solution
is
made
by
mixing
one
pound
of
stripper
(77,
Consumable Materials
Chart,
Section
2)
with each
gallon
of
water
used. The solution
should be
maintained
at
a
temperature
between
190
to
210"F
during
the
soaking
period.
Flush the heater
thoroughly
with
water
after
it is
removed from the solution.
2.
Use
a
stainless steel
brush
or
sandblast
to
remove
any
accumulation
of carbon
or
other
foreign
material
from
the
inside
of
the combustion chamber.
Clean
thoroughly
with
compressed
air.
b.
Cleaningthe
spray
nozzle.
i.
Disassemble
the
spray
nozzle
by
unscrewing
the
fuel strainer
and two
piece
core
from
the
nozzie
body.
2.
Clean
the
parts
in solvent
(78,
Consumable
Material,
Chart
2).
I
3.
If
soaking
fails
to
thoroughly
clean the
parts,
scrub them
with
a
soft,
nonmetallic
brush.
4.
The
grooves
in the
core
and
orifice
in the
body,
may
be cleaned with
a
soft
pointed piece
of
wood.
I
CAUTION
I
CAUTION
Do
not
use a
metal tool
for
cleaning
the
parts
as
it will alter the flow characteristics
of the
nozzle.
5.
When
reassembling
the
spray
nozzle,
tighten
the
core
with
a
screwdriver
and
the
strainer with
the
fingers.
c.
Cleaning
the
spark
plug.
1.
Before
cleaning,
examine the
spark plug
for evidence
of
cracked
or
broken
porcelain, arcing
or
carbon
tracks
inside
the
well
of
the
spark plug.
If
cracks
are
found,
discard
the
plug.
Arcing
or
carbon
tracks
may
be
caused
by shorting
of the
plug
or
by
dirt
on
the
spring
connector
that
seats
in the
well
of
the
spark
plug.
In
either
case
the
fault
should
be
corrected before
reinstalling
the
plug.
2.
Wipe
out
the inside
ofthe
well
of the
spark plug
with
a
clean cloth
dampened
with carbon
tetrachloride.
3.
Close
the
plug
well
with
a
stopper
and
sandblast
the
plug.
COII~BUSTION
CHAI~IBER
AND RADIA
TOR
INSPECTION
a.
Slight
scaling
and
discoloration
of the combustion chamber
and
radiator
assembly
is
a
normal
condition
on
heaters
that
have been in
use.
The scale
will be
mottled and
a
blue
powder
can
be rubbed
off of
the scaled
areas.
This
does
not constitute
ground
for
rejecting
the heater since considerable
life
can
stilt
be
expected
if
there
are
no
soft
spots
in the metal where it has been
subjected
to
severe
overheating.
E20
SECTION
10
JU,P~eO;Page
7