Stihl MS 391 Instruction Manual page 50

English
a Required distance between depth
gauge and cutting edge
When cutting softwood outside of the
frost season, the distance can be
increased by up to 0.2 mm (0.008").
Chain pitch Depth gauge
Distance (a)
Inches (mm) mm
1/4 P (6.35) 0.45
1/4 (6.35) 0.65
3/8 P (9.32) 0.65
0.325 (8.25) 0.65
3/8 (9.32) 0.65
0.404 (10.26) 0.80
Lowering the depth gauges
The depth gauge setting is lowered
when the cutter is sharpened.
Check the depth gauge setting after
N
each sharpening
1
Lay the appropriate file gauge (1)
N
for the chain pitch on the saw chain
and press it against the cutter to be
checked – if the depth gauge
protrudes past the file gauge, the
depth gauge must be reworked
48
Saw chains with humped drive link (2) –
upper part of the humped drive link (2)
(with service mark) is lowered at the
same time as the depth gauge of the
cutter.
WARNING
The rest of the humped drive link must
(Inches)
not be filed; otherwise, this could
increase the tendency of the chain saw
(0.018)
to kick back.
(0.026)
(0.026)
(0.026)
(0.026)
(0.031)
Rework the depth gauge so that it is
N
flush with the file gauge
2
Afterwards, dress the leading edge
N
of the depth gauge parallel to the
service mark (see arrow) – when
doing this, be careful not to further
lower the highest point of the depth
gauge
WARNING
Depth gauges that are too low increase
the kickback tendency of the chain saw.
Lay the file gauge on the saw chain
N
– the highest point of the depth
gauge must be flush with the file
gauge
After sharpening, clean the saw
N
chain thoroughly, removing any
filings or grinding dust – lubricate
the saw chain thoroughly
In the event of extended periods of
N
disuse, store saw chains in cleaned
and oiled condition
MS 311, MS 391