Raytheon Beech Baron E55 - Page 392

aeechcraft
BARON
55
AND
58
SHOP
MANUAL
NOTE
BENDIX
MAGNETO TIMING
(S-1200
When
timing
the
magnetos
on
airplane
SERIES)
serials TC-2
thru
TC-23,
do
not rotate
the
propeller
shaft
opposite
the
normal
a.
Check
the
magneto
for
proper
rotation before
direction of rotation
far
enough
to
replacing
the
magneto
on
the
engine.
engage
the
magneto
impulse
drives,
b.
Remove
the
timing inspection plug
from the
top
of
This
will
delay
the
opening
of
the
points
the
magneto,
and
turn
the
magneto
drive
shaft
in
the
until
the
piston
is
at
top
center.
If
the
direction of
rotation until the
timing
mark
on
the
dis-
inpulse
drives
do
become
engaged,
tributer
gear
is
approximately
aligned
with the mark
on
rotate
the
shaft in the
normal
direction
the distributor block.
The
magneto
is
now
in the No.
1
until
the
points
open,
then in the
oppo-
cylinder firing
position.
site
direction
for
approximately
28".
NOTE
f.
Turn the crankshaft
in the normal
direction
of
rota-
tion
until the
light just
goes
out
and
note
the
degree
The
timing
marks
are
for
reference
only.
before
TDC. The
light
should
go
out at
20"
0" 2"
No
adjustment
of
contact
opening
shall
before
TDC.
be
made from these marks. Use these
marks
as
an
indication
of
proper
internal
g.
Connect the
timing
light
to
the
right
magneto
and
timing.
For internal
timing
of the
magne-
again
turn
the
crankshaft
approximately
28"
opposite
tos
refer
to
Bendix,
Scintilla
Division,
the normal
rotation.
The
timing
light
will
come on
at
manual
Form L-609B.
about
20"
ETC.
c.
Position
the
engine piston
in
No.
1
cylinder
(right
h. Turn
the crankshaft
in
the normal direction
of
rota-
rear
cylinder)
to
fully
advanced
position by covering
tion
until the
light just
goes
out
and
note
the
degree
the lower
spark
plug
hole
in
No.
1
cylinder
with
the
before
TDC.
The
light
should
go
out at
20"
0" 2"
thumb
and
turning
the crankshaft until
pressure
is
felt
before
TDC.
on
the
thumb.
If
the
preceding
procedure
is
used and the
magnetos
d. Remove the threaded
plug
in
front of No.6
cylin-
check
within
+O"
2",
they
are
timed
correctly.
If
the
der
(left
front
cylinder)
and
observe the
timing
marks
magnetos
are
not
timed
correctly, proceed
in
the
fol-
on
the alternator
drive
gear
as
the
crankshaft
is
lowing
manner:
rotated
slowly.
When the
mark
on
the
gear
is centered
1.
Set
the
number
one
piston
at
20"
before
TDC
in
the
viewing
hole,
No.l
piston
is
at
the 20"
ETC
on
the
compression
stroke.
position
on
the
10-470
engines
and 22"
ETC
position
on
the
10-520
engines.
2.
Loosen
the
right
magneto
mounting
nuts.
e.
Install
the
magneto
on
the
engine
and
tighten
the
3.
Rotate
the
magneto
until
the
light just
goes
mounting
bolts
only enough
to
permit
rotating
the
out.
magneto
for
final
timing.
4.
Tighten
the
magneto
mounting
nuts.
f.
Connect the
positive
lead of
a
timing
light
to
the
5.
Repeat
the
same
procedure
for the
left
mag-
switch terminal
(capacitor
stud)
of the
magneto
and
neto.
secure
the
ground
lead
to
a
suitable
ground.
After
magnetos
have
been
properly
timed,
clean
the
NOTE
breaker
points
to
remove
any
trace
of oil
or
dirt.
When
timing
the
magneto
to
the
engine,
Replace
the
breaker
cover,
lock washers
and retain-
the
timing
light
should
go
out
20"
0"
ing
screws,
and
secure
with
safety
wire.
2"
ETC.
NOTE
g.
If
the
timing light
is
out,
rotate
the
magneto
hous-
Breaker
points
on
Bendix
Scintilla
ing
in
the direction
of its
magnet’s
rotation
a
few
S6RN-25
type magnetos
are
not to
be
degrees beyond
the
point
where the
light
comes
on,
adjusted
to
a
given
clearance.
For
then
slowly
turn
the
magneto
in
the
opposite
direction
proper
S6RN-25
magneto
adjustment,
until
the
light
just
goes
out.
Secure
the
magneto
in
this
refer
to
Scintilla’s
instructions.
position
and recheck the
adjustment.
815
6-19