Flywheel - Stihl 009 User Manual

STIHL 009, 010, 011
Removing the contact spring
The contact spring is screwed to the
contact set. If the contact spring has
to be replaced, first remove the fly-
wheel (4.4.4), then take out the 3 pan
head screws and remove the contact
set with contact spring and cable
clamp from the crankshaft stub. Push
the cable clamp to the rear and
slacken off screw in contact set a few
turns. The contact spring can now be
pushed to the rear and taken off.
Reverse the above procedure to in-
stall the new contact spring. Reset
breaker point gap (4.4.7).
4.4.4

Flywheel

The flywheel has several functions. It
accommodates the permanent mag-
net for the ignition system with a
north and south pole (polarized in the
engine's normal direction of rotation).
The relatively large flywheel mass
insures that the engine turns smooth-
ly, i.e. it substantially suppresses the
normal irregularities of the engine's
combustion process.
The front of the flywheel is designed
as a fanwheel to provide the neces-
sary air for engine cooling
Six pawl detents are machined in the
hub on the front side of the flywheel
in order to transmit the starting
torque.
The flywheel is mounted at the igni-
tion end of the crankshaft on a taper
seat, located by means of a key and
secured with a hexagon nut.
To disassemble the flywheel, first
remove the fan housing, unscrew the
spark plug and fit the locking screw in
the spark plug hole. Tighten it down
by hand.
Turn flywheel counterclockwise until
the piston head butts against the
locking screw. Use a ring or socket
wrench to slacken off and remove the
hexagon nut counter-clockwise.
Screw flywheel puller as far as it will
go onto
Top:
Locking screw 1107191 1200 in position
Bottom:
Releasing hexagon nut
the crankshaft stub an then back it off
one full turn. Now hold the flywheel
and tap the puller with a small
hammer. This releases the flywheel
from its taper seat. Unscrew the
puller and take off the flywheel.
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