MASSEY FERGUSON MF 14 - Page 79

MASSEY-FERGUSON
GROUP
O-SECTION
V-PART 9
ICNITION
SYSTEM
3.
Using
a fywheel puller, remove
the flywheel as
shown
in
Fie.8.
Fig.
8
4.
Remove dust cover
and
gasket
from magneto.
5. Crank engine
slowly until
breaker
points of
magneto
are fully
opened. If
points are
burned
or
pitted,
replace as
described under
the
sub-heading,
"Magneto
Breaker Points Replacement".
6.
With
points
fully
opened, check
point
gap
with
a feeler
gauge.
The
point
gap
should
be
as
indicated
on the
body of the magneto.
7.
If
gap
is incorrect,
loosen screw
that holds
sta-
tionary
point to breaker
plate
and move
breaker
point
with a
screwdriver
to correct
gap
as
shown
in
Fie.
9.
-
Fig.
9
8. Tighten screw
that holds stationary
point
to
breaker
plate and
recheck
adjustment.
BREAKER
POINTS
REPLACEMENT
l.
Remove flywheel
and magneto
dust cover.
Printed in
U.S.A.
2.
Remove nuts that hold electrical
lead to the
screw on the movable breaker
point spring.
3.
Remove stationary breaker
point.
4. Position a new
stationary
breaker
point
on
breaker
plate;
install the screw
but do
not tighten.
5. Position new
movable
breaker
point onto stud.
Position
leads
onto spring end of movable
breaker
point and secure with nuts.
6. Adjust breaker
point
gap
as
described in
sub-
heading,
"Magneto-Adjustrnent",
and
tighten
the
screw that holds the stationary breaker
point to
the
breaker
plate.
REMOVAL &
DISASSEMBLY
l.
Check
to insure that timing marks are
plainly
visible on magneto breaker
plate
and on
crankcase.
If
not,
use a
punch
to make them clear.
2.
Remove fywheel as described in
"Magneto-Ad-
justment".
3. Disconnect
electrical
leads from magneto.
Dis-
connect high tension cable from spark
plug.
4. Remove magneto from crankcase.
5. Remove cover and
gasket
from
magneto.
Remove
movable contact from stud on breaker
plate.
6.
Remove the stationary
contact. Disconnect elec-
trical lead
and remove
condenser.
7.
Remove breaker
cam
from
crankshaft.
INSPECTION
CoilAssembly
l.
Inspect coil for cracks or
gouges
in insulation,
evidence
of overheating
or
other damage.
Make
sure
electrical
leads
are
intact, especially
where they
enter
the coil.
2.
With coil assembly
installed onto
core
assembly,
check
the
operation of
the coil on an
approved
tester.
When coil
is in
good
condition,
it
will produce
a
spark across
the
gap
at
the recommended
dial setting.
(Refer
to
Specification
Chart supplied
by test equip-
ment manufacfurer
and use
the appropriate
control
setting for the coil assembly being
tested. If
coil
fails
to produce a continuous spark
at this setting,
coil
should be replaced.
3. Check outer
insulation of coil
for high
tension
leaks by using a probe. Holding
the
probe
X"
away
from
the
insulation,
move
it
around
the coil. If
a weak
spot
is present,
a
spark will
jump
from
the
probe to the
coil.
Replace
the coil if the insulation
is weak.
4.
To
remove the coil from the core,
straighten
the
clip at the end of the coil and
pull the coil
from the
core,
Condenser
l
lnspect condenser
for damaged
terminal
lead,
dents in can or a broken
mounting
clip.
J