Stihl HT 131 Instruction Manual page 32

English
Hold the file horizontally (at a right
N
angle to the side of the guide bar)
and file according to the angles
marked on the file holder. Rest the
file holder on the top plate and depth
gauge.
Always file from the inside to the
N
outside of the cutter.
The file only sharpens on the
N
forward stroke – lift the file off the
cutter on the backstroke.
Avoid touching the tie straps and
N
drive links with the file.
Rotate the file at regular intervals
N
while filing to avoid one-sided wear.
Use a piece of hardwood to remove
N
burrs from the cutting edge.
Check angles with the filing gauge.
N
All cutters must be the same length.
30
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.
Find the shortest cutter and then file
N
90° all other cutters back to the same
length. It is best to have this work
done by a servicing dealer 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 the
mild weather season – no frost.
Chain pitch
inch (mm)
1/4 P (6,35)
1/4 (6,35)
3/8 P (9,32)
0.325 (8,25)
3/8 (9,32)
Lowering depth gauges
The depth gauge setting is reduced
when the chain is sharpened.
N
a
N
Saw chains with humped drive link (2) –
upper part of humped drive link (2) (with
service mark) is lowered along with the
depth gauge.
The other parts of the humped drive link
must not be filed since this may increase
the kickback tendency of the power tool.
Depth gauge
Setting (a)
mm (inch)
0,45 (0.018)
0,65 (0.026)
0,65 (0.026)
0,65 (0.026)
0,65 (0.026)
Use a filing gauge to check the
setting every time you sharpen the
chain.
1
Place a filing gauge (1) that
matches the chain pitch on the
chain and press it against the cutter
– if the depth gauge projects from
the filing gauge, the depth gauge
has to be lowered.
WARNING
HT 100, HT 101, HT 130, HT 131
2