Checking And Replacing The Chain Sprocket; Maintaining And Sharpening The Saw Chain - Stihl MS 170 Manual De Instrucciones

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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) are
–
deeper than 0.02 in (0.5 mm) since
this would reduce the life of the
chain. 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.
44
Use a screwdriver to remove the E-
N
clip.
Remove the washer.
N
Pull the sprocket and needle cage
N
off the crankshaft.
Installing the chain sprocket
Clean the crankshaft stub and
N
needle cage, and lubricate with
STlHL grease (special accessory).
Push the needle cage on to the
N
crankshaft.
After fitting the chain sprocket,
N
rotate it about one turn to engage oil
pump drive.
Refit the washer and E-clip on the
N
crankshaft.
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!
MS 170, MS 170 C, MS 180, MS 180 C