Stihl 044 Instruction Manual - Page 44

Checking and Replacing, Chain Sprocket

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Checking and Replacing Chain Sprocket 6 001BA104 ST Release the rotor - •• Let go of rope slowly so that it winds onto the rotor. The starter grip must locate firmly in the rope guide bush. If the grip droops to one side: Add one more turn on rope rotor to increase spring tension. • When starter rope is fully extended it must be possible to rotate the rotor at least another half turn. If this is not possible, the spring is overtensioned and could break. Take one turn off the rope. • Fit the fan housing on the crankcase. Set the Master Control lever to d •• Push the remaining rope into the starter grip so that the nipple (6) is flush with the grip. 42 Replacing a broken rewind spring • Lubricate the new spring with a few drops of non-resinous oil. • Remove the rope rotor see "Replacing Starter Rope" - Warning: The bits of spring in the fan housing might still be under tension and could fly apart when you take them out of the housing. To reduce risk of injury, wear eye and face protection and work gloves. • Use a screwdriver to carefully pry the parts of the spring out of the housing. • Place the new spring with retaining frame in position in the fan housing the anchor loop must engage the lug. • Apply suitable tools (screwdriver, punch, etc.) to the recesses (arrows) and push the spring into its seat - it slips out of the retaining frame in this process. • Reinstall the rope rotor, tension the rewind spring, fit the fan housing and secure in position. Replace the chain sprocket after using two Oilomatic chains or sooner if the wear marks on the sprocket are deeper than approx. 0.5 mm (1/64") since this would reduce the life of the chain. Check wear marks: Left: on webs of rim sprockets Right: on teeth of spur sprockets. You can use gauge* 0000 893 4101 to check the depth of the wear marks on spur and rim sprockets. It is best to use two chains in rotation with one sprocket. Before removing chain sprocket • Remove chain sprocket cover, chain and guide bar. • Disengage the chain brake: Pull hand guard toward front handle. * Special accessory 044

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•
Release the rotor -
•
Let go of rope slowly so that
it winds onto the rotor.
The starter grip must locate firmly
in the rope guide bush.
If the grip droops to one side:
Add one more turn on rope rotor
to increase spring tension.
•
When starter rope is fully extended
it must be possible to rotate the rotor
at least another half turn. If this is
not possible, the spring is over-
tensioned and could break.
Take one turn off the rope.
•
Fit the fan housing on the
crankcase.
•
Set the Master Control lever to
d
•
Push the remaining rope into
the starter grip so that the nipple
(6)
is flush with the grip.
Replacing a broken rewind spring
•
Lubricate the new spring with
a few drops of non-resinous oil.
•
Remove the rope rotor -
see “Replacing Starter Rope” -
Warning:
The bits of spring in the fan
housing might still be under tension and
could fly apart when you take them out
of the housing. To reduce risk of injury,
wear eye and face protection and work
gloves.
•
Use a screwdriver to carefully pry
the parts of the spring out of the
housing.
•
Place the new spring with retaining
frame in position in the fan housing -
the anchor loop must engage the
lug.
•
Apply suitable tools (screwdriver,
punch, etc.) to the recesses
(arrows) and push the spring into
its seat - it slips out of the retaining
frame in this process.
•
Reinstall the rope rotor, tension the
rewind spring, fit the fan housing
and secure in position.
Replace the chain sprocket
after using two Oilomatic chains
or sooner if the wear marks on the
sprocket are deeper than approx.
0.5 mm (1/64") since this would reduce
the life of the chain.
Check wear marks:
Left:
on webs of rim sprockets
Right:
on teeth of spur sprockets.
You can use gauge* 0000 893 4101 to
check the depth of the wear marks on
spur and rim sprockets.
It is best to use two chains in rotation
with one sprocket.
Before removing chain sprocket
•
Remove chain sprocket cover,
chain and guide bar.
•
Disengage the chain brake:
Pull hand guard toward front handle.
* Special accessory
Checking and Replacing
Chain Sprocket
6
001BA104 ST
42
044