Cessna 182 1978 - Magnito Contact Breaker Points

MODEL
182 & T182 SERIES
SERVICE MANUAL
THESE CONTACT
POINTS ARE USABLE
THESE
CONTACT POINTS
NEED REPLACEMENT
Figure
11-6.
Magnito
Contact
Breaker
Points
internal
timing need
not be checked.
If timing
is
a.
Moisture Check.
out of tolerance,
remove magneto
and set internal
1. Remove
magneto from
engine and remove
timing,
then install
and time to the
engine. In the
screws
securing the
magneto halves
together, dis-
event
the magneto
internal
timing marks
are off
connect
capacitor
slip terminal
and remove
distrib-
more
than plus
or minus five
degrees
when the break-
utor.
Inspect
for moisture.
er points open
to fire number one cylinder, remove
2. Check distributor gear finger and carbon
the magneto
and
check the magneto
internal
timing.
brush
for moisture.
Whenever
the magneto
halves
are separated
the
3. Check
breaker point
assembly
for moisture,
breaker
point assembly
should
always be
checked.
especially
on
the surfaces
of the breaker
points.
As
long as internal
timing
and magneto-to-engine
4. If any
moisture
is evident in
the preceding
timing
are within
the preceding
tolerances,
it is
places,
wipe with
a soft, dry,
clean, lint-free
cloth.
recommended
that the
magneto
be checked
internally
b. Breaker
Compartment
Check.
only
at 500 hour
intervals.
It is
normal for
contact
1. Check
all parts
of the
breaker
point assem-
points
to burn
and the
cam to
wear a
comparable
bly
for security.
amount
so the
magneto
will
remain
in time
within
2.
Check
breaker
point surfaces
for evidence
of
itself.
This
is accomplished
by having
a
good area
excessive
wear,
burning,
deep
pits
and carbon
de-
making
contact
on
the surface
between
the
points
and
posits.
Breaker
points
may
be cleaned
with
a hard-
the correct
amount
of spring
pressure
on the cam.
finish
paper.
If breaker
point
assembly
is
defective,
The area
on the
points
should
be twenty-five
percent
install
a
new assembly.
Make no
attempt
to stone
or
of the area
making contact.
The spring
pressure at
dress the breaker
points.
Clean new breaker
points
the cam
should
be 10. 5
to 12. 5 ounces.
When
the
with
clean,
unleaded
gasoline
and hard-finish
paper
contact
points
burn, the
area
becomes
irregular,
before
installing.
which
is not
detrimental
to the
operation
of the points
3.
Check capacitor
mounting
bracket
for
cracks
unless metal
transfer
is too great
which
will cause
or
looseness.
the engine
to
misfire.
Figure
11-6
illustrates
good
4.
Check
the carbon
brush
on the
distributor
and
bad contact
points.
A small
dent
will appear
on
gear for
excessive
wear.
The brush
must
extend a
the
nylon insulator
between
the cam
follower
and
the
minimum
of
1/32
inch beyond
the
end of
the gear
breaker
bar. This
is normal
and
does not
require
shaft.
The
spring which
the carbon
brush
contacts
replacement.
should
be bent out
approximately
20
degrees
from
vertical,
since
spring pressure
on
the brush
holds
NOTE
the distributor gear
shaft against the
thrust bearing
in the distributor
cap.
If ignition
trouble
should develop,
spark
plugs
5.
Oil the bearings
at
each end of
the distributor
and
ignition wiring
should be checked
first.
gear shaft
with a drop
of SAE 20 oil.
Wipe excess oil
If the trouble definitely is
associated with a
from parts.
magneto,
use the
following to help
disclose
6.
Make sure internal
timing is
correct and re-
the
source of trouble
without
overhauling
the
assemble
magneto.
Install
and properly
time mag-
magneto.
neto to
engine.
11-27