Stihl MS 280 C-Q Instruction Manual page 40

English
depth gauge setting, cutter length and
groove depth. It also cleans the guide
bar groove and oil inlet holes.
File correctly
N Select sharpening tools according
to chain pitch.
N Clamp the bar in a vise if necessary.
N Lock the chain – push hand guard
forward.
N To rotate the chain – pull hand
guard against handle to disengage
the chain brake On models with
QuickStop Super, also press down
the throttle trigger interlock lever.
N Sharpen chain frequently, take
away as little metal as possible –
two or three strokes of the file are
usually enough.
38
N
Hold the file horizontally (at a 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.
N Always file from the inside to the
outside of the cutter.
N The file only sharpens on the
forward stroke – lift the file off the
cutter on the backstroke.
N Avoid touching the tie straps and
drive links with the file.
N Rotate the file at regular intervals
while filing to avoid one-sided wear.
N Use a piece of hardwood to remove
burrs from cutting edge.
N Check angles with the filing gauge.
All cutters must be the same length.
If the cutters are not the same length,
they will have different heights. This
makes the chain run roughly and can
cause it to break.
N
Find the shortest cutter and then file
90° all other cutters back to the same
length. It is best to have this work
done in the workshop on an electric
grinder.
Depth gauge setting
The depth gauge determines the height
at which the cutter enters the wood and
thus the thickness of the chip removed.
a Specified distance or setting
between depth gauge and cutting
edge.
This setting may be increased by
0.2 mm (0.008") for cutting softwood in
mild weather season – no frost.
Chain pitch
inch (mm)
1
/4 (6,35)
3
/8 PM,
PMMC3 (9,32)
0.325 (8,25)
3
/8 (9,32)
0.404 (10,26) 0,80
a
Depth gauge
setting (a)
mm (inch)
0,65 (0.026)
0,65 (0.026)
0,65 (0.026)
0,65 (0.026)
(0.031)
MS 280 C-Q