Maintaining And Sharpening The Saw Chain - Stihl MS 381 Instruction Manual

Loosen and remove the screws (5).
N
Remove the side plate (6) and
N
cover (7) with cover washer (8).
10
12
11
Remove the oil pump drive worm (9)
N
by rotating it clockwise while pulling
it off the pump shaft.
Remove the spur sprocket (10) or
N
clutch drum with spur gear (11) and
needle bearing (12) from the
crankshaft.
NOTICE
Check serviceability of spur gear and
worm. Replace any worn or damaged
parts.
Install in the reverse sequence.
Clean the crankshaft stub and
N
needle bearing, and lubricate with
STlHL grease (special accessory).
Push the needle bearing, spur
N
sprocket and clutch drum with spur
gear onto the crankshaft.
Engage the oil pump drive worm by
N
rotating it counterclockwise while
pushing it onto the pump shaft.
Lubricate the worm and spur gear
N
with STIHL grease (special
accessory).
MS 381
Fit the cover, cover washer and side
N
plate, fit screws and tighten them
down firmly.
Install the circlip on the spur
N
sprocket – each end of the ring must
locate on the top of a tooth.
9
Maintaining and Sharpening
the Saw Chain
Sawing effortlessly with a properly
sharpened saw chain
A properly sharpened saw chain cuts
through wood effortlessly even with very
little pushing.
Never use a dull or damaged saw chain
– this leads to increased physical strain,
increased vibration load, unsatisfactory
cutting results and increased wear.
Clean the saw chain
N
Check the saw chain for cracks and
N
damaged rivets
Replace damaged or worn chain
N
components and adapt these parts
to the remaining parts in terms of
shape and level of wear – rework
accordingly
Carbide-tipped (Duro) saw chains are
especially wear-resistant. For an optimal
sharpening result, STIHL recommends
STIHL servicing dealers.
WARNING
Compliance with the angles and
dimensions listed below is absolutely
necessary. An improperly sharpened
saw chain – especially depth gauges
that are too low – can lead to increased
kickback tendency of the chain saw –
risk of injury!
English
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