Stihl MS 170 Notice D'emploi page 49

English
Furthermore, the angles must be the
same on all cutters. If angles are
uneven: Chain will run roughly, not in a
straight line, wear quickly and finally
break.
As these requirements can be met only
after sufficient and constant practice:
: Use a file holder
A file holder (special accessory) must be
used for manual resharpening (see table
"Sharpening Tools"). The correct filing
angles are marked on the file holder.
48
For checking angles
90°
85° 70°
80°
60°
30° 35°
10° 0°
Use a STlHL filing gauge (special
accessory – see table "Sharpening
Tools"). This is a universal tool for
checking the filing and side plate angles,
depth gauge setting and cutter length. It
also cleans the guide bar groove and oil
inlet holes.
File correctly
: Select sharpening tools according
to chain pitch.
: Clamp the bar in a vise if necessary.
: Lock the chain – push hand guard
forward.
: To rotate the chain, pull the hand
guard against the front handle to
disengage the chain brake. On
models with QuickStop Super, also
press down the throttle trigger
interlock lever.
: Sharpen chain frequently, take
away as little metal as possible –
two or three strokes of the file are
usually enough.
: Hold the file horizontally (at right
angle to side of guide bar) and file
according to the angles marked on
the file holder. Rest the file holder on
the top plate and depth gauge.
MS 170, MS 180, MS 180 C
90°