Cessna 182 1978 - Page 288

MODEL 182
& T182
SERIES
SERVICE MANUAL
(BTC) on the
compression stroke of
number one
h. Attach the red lead
of the timing light (Bendix
cylinder.
Rotate crankshaft
in a normal
direction
Part No. 11-9110
or equivalent)
to the left
switch
to align
the timing mark
on the front face
of the
lead adapter,
the green
lead of the timing
light to
starter
ring gear
support
with the
drilled hole
in the
the
right switch
lead
adapter
and the black
lead
of
starter,
making
sure the
final motion
of the ring
gear
the timing
light to the
magneto housing
(common
is in the direction of normal
rotation.
ground).
NOTE
NOTE
An accurate
top center
indicator which
screws
An internal
timing tolerance
is allowed
when
into a spark plug mounting
hole, and a pendu- adjusting
the two main breakers. Therefore,
lum pointer mounted on a 360-degree
timing one of the main
breakers may open slightly
disc may also be used
to locate the advanced before
the other. Magneto-to-engine timing
firing position.
The timing disc should be
should be accomplished using the first main
adapted to
fit over the end of the
propeller
breaker to open
as the reference point
when
spinner in
such a manner
that it may be
ro-
the engine
is in the firing
position for
No. 1
tated
as necessary. In all cases, it must be
cylinder. This will ensure
that ignition
definitely
determined
that
the number
one
created
by either spark
plug
will not occur
cylinder
is
at the correct
firing
position and
prior
to the desired
engine
firing point.
on the compression
stroke when the
engine is
turned in
its normal
direction
of rotation.
i. Turn
the entire
magneto
in direction
of rotor
rotation,
right-hand
rotation
to right
and left-hand
After the
engine has
been placed
in the correct
firing
rotation
to left,
until one of
the timing
lights just
position, install
the magneto
to the
engine in the
fol-
goes off.
Then tighten
the magneto
mounting
clamps
lowing
manner:
evenly in this
position.
a. Remove
the timing window
plug from
the most
k. Back the
engine up approximately
10° and
then
convenient
side of the magneto
housing,
carefully "bump"
the engine forward
while observing
b. Remove the rotor viewing location plug from the the timing lights.
top
center of the
housing.
1.
At the No. 1 cylinder
firing position,
one of the
c. Turn
the rotating
magnet drive shaft
in the nor-
timing lights
should go
off. Continue turning
the en-
mal direction
of magneto
rotation until
the red painted
gine in its
normal direction
of rotation until
the other
tooth
of the
large distributor
gear is centered
in
the
timing
light goes
off. This
should
be not more
than
timing
hole (hole
at each
side
of magneto).
3 engine
degrees
later
than the
first light.
If
not,
d.
Also
observe
at
this time
that
the built
in pointer
repeat
steps "i"
thru
"k" until
these
conditions
are
just ahead
of the rotor
viewing
window
aligns with
the
obtained.
L "E"
gap) mark
on the rotor.
m. Make sure
the magneto
clamps
are tightened
e.
Install
the magneto-to-engine
gasket
on the
mag-
securely,
recheck
timing
once more
and
remove
neto flange.
timing
equipment.
n.
Reinstall inspection
plugs and torque plugs
to
12-15 lb-in.
Do
not attach
harness
spark
plug
leads
to the
11A-63.
MAINTENANCE.
At the
first 25-hour
in-
spark
plugs
until
all magneto-to-engine
timing
spection.
first
50-hour
inspection,
first
100-hour
procedures
are
completed
and the
switch
leads
inspection
and
thereafter
at each
100-hour
inspection,
("P" leads)
are connected.
the contact
breaker
point compartment
and
magneto-
to-engine
timing should be
inspected and checked.
f. Remove
the
engine-to-magneto
drive
gear
train
If
magneto-to-engine
timing
is correct
within plus
backlash
by turning
magneto
drive
opposite
to normal
zero
and
minus
two degree.
internal
timing
need
not
rotation
as
far as
possible.
be checked.
If timing
is out
of tolerance.
remove
g. With
the
No. 1
cylinder
at
its correct
firing
posi-
magneto
and
set internal
timing
(paragraph
11-62).
tion
and
on the
compression
stroke.
hold
the
magneto
then
install
and time
to
engine.
as close
to
its No.
1 firing
position
as possible
(red
tooth
in
center
of window
and
pointer
over
L
("E" gap)
NOTE
mark
on
rotor
and install
magneto
to the
engine.
Loosely
tighten
magneto
in
position.
If engine
operating
troubles
develop
which
appear to
be caused by the
ignition system,
NOTE
it is advisable
to check
the spark
plugs and
ignition
harness first before
working on the
To facilitate
connection
of
a timing
light
to
magnetos.
If the
trouble
appears
definitely
the switch
lead
("P"
lead) terminals,
short
associated
with a magneto.
the following
adapter
leads
may be
fabricated.
These
can
may
be used
to help
disclose
the
source
of
be made
by
using
two switch
lead
terminals
trouble
without
overhauling
the magneto.
and
two short
pieces
of insulated
wire.
In-
stall the
fabricated
adapter leads
in the
switch
lead
outlet terminals
of the cover.
11A-17