Paralleling Relay; Magneto Spring Height - Beechcraft TRAVEL AIR 95 Shop Manual

starter
ring
gear aligns with
the
hole in
the
starter ing light wires
connected
and recheck magneto
timing
housing,
at which point
the
light should dim
(or
go
as previously described
to
make
sure
that
both mag-
out,
on battery-powered
timing
lights). If not,
turn
netos
are
set
to
fire
together.
If
timing
is correct,
the
magneto
in its
mounting
flange slots and repeat both
timing
lights
will dim simultaneously
when
the
the
procedure until
the light dims at
25°
before
top
advance
timing
marks on
the
front of
the engine are
dead center. Tighten
the two
mounting nuts and in exact
alignment.
If
the
breaker
points
open
too
replace
magneto
inspection plug.
early,
loosen
the
mounting
nuts and rotate
the mag-
neto clockwise. If
the
breaker points open
too
late,
NOTE
rotate
the
magneto
counterclockwise.
On airplane
Serial TD-127, TD-444,
TD-453
After magnetos
have been properly
timed,
clean
the
and after,
repeat
the
above procedure for
breaker points
to
remove any
trace
of
oil
or dirt.
timing the
right
magneto to
time
the
left mag-
Replace
the
breaker
cover,
the
lock and
the
retaining
neto.On
airplanes prior
to
Serial TD-453, screws
together
with
the
lockwire.
except
TD-127
and TD-444,
proceed
to
time
the
left magneto using
the
following
pro-
The breaker point clearance for
the
S-200
magneto
cedure. is
.018
±.006.
If
the
points
are
burned or
worn
excessively, do not
try to
redress
the
contact
sur-
Install
magneto
impulse coupling
adapter
with gas-
faces.
Install a complete new breaker assembly if
ket
on
left magneto mounting pad
of the
accessory
the
points
are found
to
be in an unsatisfactory
condi-
housing.
tion.
Wipe
the
breaker
compartment
free of any
oil
or dirt with a clean cloth. The point
clearance
and
NOTE condition should be checked
every
100 hours.
The impulse coupling magneto
can
be used
Any
time the
magneto harness
cable
outlet
plate is
only on
the
left side of
the engine, when
removed, check
the
height
of
all
distributor
block
viewed from
the
rear, or
accessory housing,
contact
springs
using a
flush
pin
gage.
This dimen-
end.
sion is determined by measuring
from
the top
of
the
block
outlet
tower
down
to the top
of
the
spring (see
illustration).
The measurement should
not
exceed
Remove
inspection plug and
turn
magneto
drive
coupling until
the
white beveled
tooth
on
the
magneto
gear
aligns with
the
pointer*
-0.422
MAX.
NOTE
In order
to turn the
shaft on the
impulse
coupling
magneto, depress
the
pawl on
the
impulse
coupling
with
the
finger.
Place
magneto gasket
over
mounting
studs
and
secure
CONTACT
left
magneto in place with washers
and nuts;
tighten
SPRING
nuts only finger
tight.
,-
DISTRIBUTOR
Connect
the
other
positive
wire
of the timing
light
to
BLOC K
a suitable
terminal
connected
to the
ground
terminal
connection of
the
left magneto
and
time the
magneto
in
the
same manner
as
described for
the
right
mag-
neto.
NOTE
The
crankshaft should
not be rotated
more
than
35°
in
direction opposite
normal
ro-
tation,
as
the
pawl
on
the
impulse
coupling
will
engage with
the
stop
pin and late
timing
will be indicated
through the
impulse
Figure
3-20.
Magneto
Spring Height
coupling mechanism. If
this
should happen,
rotate
engine
in
normal direction until
.
422 inch. If
the
measurement is in excess,
the
spring
sharp
click is heard,
which
will indicate
should be
replaced. Be
certain
the
bottom
coils
of
that
impulse
coupling
has passed
through
the
spring
are
not forced down
into
the
recess of
the
firing
position;
then turn
crankshaft
in
distributor
block.
direction
opposite
normal rotation
to
approx-
imately
35°
before
top
center and proceed
with
timing
check.
PARALLELING
RELAY
(Generator)
After both magnetos
have been
timed,
leave
the tim-
When
accessory
loads
make it necessary
to
use
two
3-34