Raytheon Beech Baron E55 - Page 108

Raytheon
Aircraft
Company
BARON
55
AND 58
SHOP MANUAL
The
oil
may
be drained
by opening
the drain valve
on
the bottom inboard side of the oil
sump,
the low
spot
of
the
system.
Before
draining
the
oil,
the
engines
should be
warmed
up
to
operating
temperature
to
assure
complete
draining
of
the
oil. Moisture
that
may
have
condensed and
settled
in
the
oil
sump
should
be
drained
by
occasionally
opening
the oil
drain
valve and
allowing
a
small
amount
of oil
to
escape.
This
is
particularly
important
in
winter,
when
the moisture
will
collect
rapidly
and
may
freeze.
The
oil
pressure
screen
(installed
in
TC
serials
only)
should be cleaned
at
each
periodic
oil
change.
To
clean
the
olr
pressure
screen,
remove
the
hex
head
plug directly
below the
starter
and
pull
out
the
screen.
Wash
the
screen
in
solvent
(15,
Chart
3)
and
dry
with
compressed
air.
Inspect
the
screen
for
physical
deterioration
and
damage
pnor
to
reinstalling.
Upon
reinstallation
the oil
filter
screen
plug
should
be
torqued
to
500
to
520
inch-pounds.
If
slush
deposits
are
heavy,
subsequent
oil
changes
should be
made
at
more
frequent
intervals.
The
oil
grades
listed below
are
general
recommendations
only,
and
will
vary
with individual
circumstances.
Any
detergent
aviation
grade
engine
oil
which
meets
Continental
Motors
Corporation
Specifications
MHS-24B
Is
acceptable
for
use.
RECOMMENDED OIL
GRADES
FOR
ENGINES
During
cold weather the oil
sumps
should
be
checked at
pre-flight
inspection
to
be
sure
that
they
are
not
blocked
with ice.
Also,
since
there
may
be
more
cylinder blow-by
during
cold
weather
starting,
with
an
attendant increase
in
oil
sludge.
the
oil
pressure
screen
should be checked
more
frequently
and
if
indicated,
the oil drain
intervals
should be
shortened.
Chart
1
I
Recommended
011
Grades
Far
Engines
Oil
Inlet
Ambient
Air Recommended
Temp.
Temperature
Viscosity
Desired Max.
Above 40"8
SAE-50
170"F
255"F
Below 40"F
SAE-30
or
10W30
All
Temperatures
15W50
20W50
E23
SECTION
2
Dec
23