Instruction Manual

MS 170, MS 170 C, MS 180, MS 180 C
English
47
N Use a screwdriver to remove the E-
clip.
N Remove the washer.
N Pull the sprocket and needle cage
off the crankshaft.
Installing the chain sprocket
N Clean the crankshaft stub and
needle cage, and lubricate with
STlHL grease (special accessory).
N Push the needle cage on to the
crankshaft.
N After fitting the chain sprocket,
rotate it about one turn to engage oil
pump drive.
N Refit the washer and E-clip on the
crankshaft.
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.
N Clean the saw chain
N Check the saw chain for cracks and
damaged rivets
N Replace damaged or worn chain
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!
Chain pitch
The chain pitch marking (a) is embossed
in the area of the depth gauge of each
cutter.
The diameter of file to be used depends
on the chain pitch – see table
"Sharpening tools".
The angles of the cutter must be
maintained during resharpening.
001BA086 KN
Maintaining and Sharpening
the Saw Chain
Marking (a) Chain pitch
Inches mm
7 1/4 P 6.35
1 or 1/4 1/4 6.35
6, P or PM 3/8 P 9.32
2 or 325 0.325 8.25
3 or 3/8 3/8 9.32
4 or 404 0.404 10.26
689BA027 KN
a