Storing The Machine; Checking And Replacing The Chain Sprocket - Stihl MS 381 Instruction Manual

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Storing the Machine

For periods of 3 months or longer
Drain and clean the fuel tank in a
N
well ventilated area.
Dispose of fuel properly in
N
accordance with local
environmental requirements.
Run the engine until the carburetor
N
is dry – this helps prevent the
carburetor diaphragms sticking
together.
Remove the saw chain and guide
N
bar, clean them and spray with
corrosion inhibiting oil.
Thoroughly clean the machine – pay
N
special attention to the cylinder fins
and air filter.
If you use a biological chain and bar
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lubricant, e.g. STIHL BioPlus,
completely fill the chain oil tank.
Store the machine in a dry, high or
N
locked location, out of the reach of
children and other unauthorized
persons.
88
Checking and Replacing the
Chain Sprocket
Remove the chain sprocket cover,
N
chain and guide bar.
Disengage the chain brake: Pull the
N
hand guard toward the front handle.
Replace the chain sprocket
after using two saw chains or
–
sooner
if the wear marks (arrows) on the
–
sprocket are deeper than approx.
0.5 mm since this would reduce the
life of the chain. You can use a
gauge (special accessory) to check
the depth of the wear marks.
It is best to use two saw chains in
rotation with one sprocket.
STIHL recommends the use of original
STIHL sprockets to ensure correct
operation of the chain brake.
Rim Sprocket
Use a screwdriver to remove the E-
N
clip (1).
Remove the washer (2).
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Examine the splines on the clutch
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drum – if the wear marks are severe,
fit a new clutch drum.
Fit rim sprocket (3) with cavities
N
facing outward.
Refit the washer and E-clip on the
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crankshaft.
Spur Sprocket
7
6
8
4
5
Use a screwdriver to remove the E-
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clip (1).
Remove the washer (2).
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Use circlip pliers (special
N
accessory) to remove the circlip (4).
5
2
1
MS 381