Raytheon Beech Baron E55 - Page 394

BARON
55
AND
58
SHOP
MANUAL
REMOVAL
OF
THE
MAGNETOS
f.
Connect
the
timing light
lead to
the
ground
termi-
nal
of
each
magneto.
Both
timing
lights
should
be
on.
a.
Remove
the
four
screws
retaining
the
high
tension
Tap
the
right
magneto
up
with
a
nonmarring
hammer
outlet
and
remove
the
outlet
from
the
magneto.
until
that
light
goes
out.
Tap
the
left
magneto
down
until the
light
goes
out.
Secure
the
magnetos.
g.
Turn
the
crankshaft
a
few
degrees
counterdock-
wise
and
bring
it
back
again
until
the
timing
marks
are
Current
production magnetos
do
not
aligned.
At
this
point
both
timing lights
should
go
out
have
the
automatic
grounding
devices
at
the
same
instant
that
the
timing
mark
on
the crank-
featured
on
earlier
Scintilla
magnetos.
shaft
flange
aligns
with
the
crankcase
parting flange
or
To be
safe,
treat
all
magnetos
as
hot
the
timing
mark
on
the
alternator
drive
gear
appears
in
whenever
the
ground
lead
is
discon-
the
center
of
the
crankcase
inspection
hole.
nected
To
ground
the
magneto,
connect
h.
If
the
timing
lights
do
not
go
out at
the
same
time,
a
wire
to
the
switch
lead
of
the
magneto
loosen
the
magneto
that
is
late
or
early
and
repeat
the
and
ground
the
wire
to
the
case.
process
outlined
in
steps
e
and
f.
b.
Remove
the
grounding
wire from the
magneto.
c.
Remove
the
two
magneto
retaining
nuts
and
INSTALLATION
AND TIMING
OF
SLICK
washers
and
pull
the
magneto
away
from
the
acces-
MAGNETOS
(10-470
ENGINES)
sory
case.
To determine
if
the
magnetos
are
properly
timed,
pro-
INSTALL4TION
AND
TIMING OF
ceed
in
the
following
manner:
MAGNETOS
(10-520-0,
IO-520-CB
AND
a.
Cover the
lower
spark
plug
hole of
No.f
cylinder
lO-ssa-e
ENGINES)
with
thumb
and
turn the crankshaft
until
pressure
is
felt
on
thumb.
a.
Remove
the lower
spark plug
from
each
cylinder.
b~
U,,,
timing
dise
or
marks
on
the
crankshaft
b.
Cover
the
lower
spark
plug
hole
of
No.
1
cylinder
flange
and
engine
crankcase
parting
surface
or
marks
with thumb
and
turn
the
crankshaft
until
pressure
is
on
the
generator/alternator
drive
pulley
to
position
felt
on
thumb.
No.l
piston
at
the
20"
0" 2"
ETC
position.
c.
Remove
the
plug
in
front
of No.
6
cylinder
and
c.
Remove
the
inspection
hole
plugs
from
the
mag-
observe the
timing
mark
on
the
alternator
drive
gear
netos.
as
the
crankshaft
is
rotated
slowly.
When the mark
on
NOTE
the
gear
is
centered
in
the
viewing
hole,
No.
1
piston
is
at
the
22"
1"
ETC
position. The
red
timing
marks,
located
on
the
NOTE
side
of the
magneto
with
the
trademark,
should
be
in line
at
20"
0"
2"
before
Prepare
the
magneto
for
installation
on
TDC.
When
the
red
marks
are
in
line,
the
engine
as
described
in
PREPARING
the
black
marks
visible
through
the vent
THE
MAGNETO
FOR
INSTALLATION
hole
on
the
opposite
side
are
in
line.
ON
THE
ENGINE.
d.
Turn
the
impulse coupling
backward,
so
latches
d.
Hold the
magneto
in the
position
it
will
occupy
will
not
engage
until the
timing pointer
inside
the
when
installed,
and
check
alignment
of
gear
coupling inspection
hole is
aligned
with
the
marked distributor
slot
and
impulse
coupling
lugs.
If
not
aligned,
pull
the
gear
tooth.
gear
out
of
mesh but
not
out
of
the oil
seal.
Turn
to
Insert the
timing
pin through
the hole
in
the
frame
correct
alignment
and
push
the
gear
back
into
mesh.
,,d
rotor shaft.
This
holds
the
magneto
for
timing
to
e.
Place
a
new
gasket
on
the
magneto
flange,
and
the
engine.
Hold
the
magneto
in
the
position
it will
install
the
magneto
carefully
so
that the drive
coupling
occupy
when
installed,
and check the
alignment
of
lugs
mate
with the slots
of
the
drive
coupling.
Install
gear
coupling
slot and
impulse coupling
lugs.
If
not
holding
washers,
lock
washers
and
nuts,
but
tighten
aligned,
pull
the
gear
out
of
mesh,
but
not
out
of
the
only
enough
to
permit
turning
the
magneto
(without
oil
seal,
and
turn
to
correct
alignment.
Push
the
gear
looseness)
for
final
timing,
back into
mesh.
E15
621