Raytheon Beech Baron E55 - Page 387

ciaeech~aft
BARON
55
AND
58
SHOP
MANUAC
Mixture...................................................FuII
Rich
Foreign
matter
lodged
between
the ball
and seat
will
result in
a
drop
in
oil
pressure.
It is advisable
to
disas-
Boost
Pump
....................................................Off
semble,
inspect,
and clean
the
relief
valve
if
excessive
h.
Record
the
fuel
flow
at
all
pressure
altitudes
pressure
fluctuations
are
noted.
(altimeter
set
at
29.29
in.
Hg.)
shown
in
Chart
6-4
if
HIGH
OIL TEMPERATURE
possible.
i.
While
in
flight
at
8,000
feet,
set
power
to
20.5
in.
Oil
temperature
is controlled
by
a
spring-loaded
oil
manifold
pressure
with the
prop
at
2,300
rpm
and
mix-
cooler
valve.
This valve will
operate
properly
if
the oil
ture
control
at
full rich. The
EGT
margin
should be
20"
has
not
become
contaminated
with
dirt
or
other for-
C
to
the
rich
side
of
peak
temperature
or
greater.
Next
eign
particles.
If
indications
are
that the
valve
is
not
lean
the mixture
from
peak
to
engine roughness.
The
operating
properly,
remove
the valve
and clean
it
in
margin
should be
20"
C
to
the
lean
side
of
peak
tem-
solvent
~ltem
15,
Consumable
Materials
Chart,
Sec-
perature
or
greater.
tion
2).
Also
inspect
the valve
seat
for
damage.
No
repairs
can
be
made to
the
valve and
adjustments
are
NOTE
not
recommended since
special
testing
equipment
is
required.
The
travel
of the valve
can
be checked
by
If
the
fuel
flow
at
12,000
to
16,000
feet
is
immersing
the
valve
assembly
in
heated
water.
The
below
the
minimum
required
in
Chart
6-4
minimum
amount
of
travel
should
be 0.090 inch
as
the
for
high
altitude,
check
and
reset
the
idle
temperature
is
raised
from
120"
Fto
170"
F.
Replace
unmetered
or
pump
outlet
pressure
to
defective
valves.
the
upper
limit. Refer
to
Chart
6-1,
8.00-
10.00
psi.
MAGNETOS
j.
If
the corrected
fuel
flow does
not
fall
within
the
required
fuel
flow
limits
(see
Chart
6-4)
or
if the
rich
RPM DROP-OFF CHECK
side-of-peak margin
is
not
obtained,
readjust
the
metered
engine
fuel
pressure
refer
to
step
d
of
FULL
The
purpose
of
the
drop-off
check
is
to determine
that
THROTTLE
FUEL
PRESSURE
ADJUSTMENT,
the
electrical
system
for
firing
the
fuel
in
the
cylinders
IC-550-C
Engine
(TH-1389
and TH-1396 and
after).
of
the
engine
is in
a
satisfactory
condition. A
drop
in
Turn
the
engine-driven
fuel
pump
bypass
adjustment
rpm
is
a
natural
characteristic
while
operating
on
screw
clockwise
to
increase
pressure
(fuel
flow)
or
single
ignition
of
a
dual
ignition
system.
The absence
counterclockwise
to
decrease
pressure
(fuel
flow).
of
an
rpm
drop
may
be
an
indication
of the
magneto
Refer
to
Figure
6-7.
bne
psi
is
approximately equal
to
timing
advanced
beyond
the
setting
specified,
or
of
an
one
gph.
open
magneto
primary
lead
(hot
mag),
or
of
a
defec-
tive
mag
switch.
Verify
the
cause
before
checking
mag
timing.
NOTE
Conditions:
Full
Throttle,
Full
Rich,
~l--t
CAUTION
Boost
Pumps
off,
2500
rpm,
110
kias.
OIL PRESSURE
ADJUSTMENT
Never advance the
timing
beyond
the
specifications
in
order
to
reduce
rpm
The function of the
oil
pressure
relief
valve
is
to
main-
drop.
Timing
advanced
beyond
the
set-
tain
engine
oil
pressure
within
specified
limits
by
with-
ting specified by
the
engine
manufac-
drawing
a
portion
of
the oil from
the
circulating
system
turer
can
cause
detonation
and/or
preig-
and
returning
the
oil
to
the
sump,
nition,
resulting
in
broken
rings,
cracked
and
burned
pistons
and
abnormal and
The
oil
pressure
adjustment
screw
is located
approxi-
excessive
stress
induced
into
cylinder
mately
3
inches
below
the oil
filter
housing.
To
adjust,
heads,
cylinder
barrels,
crankcase,
turn
the
adjusting
screw
clockwise to
increase, or
crankshaft and
connecting
rods.
counterclockwise
to
decrease,
the oil
pressure.
The
oil
pressure
should
be
10
psi
minimum
at
idle
and
between
30
to 60
psi
at
maximum
operating
rpm
and
The
drop-off
check should
be
accomplished
as
fol-
temperature.
lows:
6-14
515