Instruction Manual

MS 231, MS 231 C, MS 251, MS 251 C
English
41
markings on the file holder – rest the
file holder on the tooth head and the
depth gauge
N File only from the inside outward
N The file only sharpens on the
forward stroke – lift the file on the
backstroke
N Do not file tie straps and drive links
N Rotate the file a little periodically in
order to avoid uneven wear
N To remove file burr, use a piece of
hardwood
N Check angle with file gauge
All cutters must be equally long.
With varying cutter lengths, the cutter
heights also vary and cause rough
running of the saw chain and chain
breakage.
N All cutters must be filed down equal
to the length of the shortest cutter –
ideally, one should have this done
by a servicing dealer using an
electric sharpener
Depth gauge setting
The depth gauge determines the depth
to which the cutter penetrates the wood
and thus the chip thickness.
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").
Lowering the depth gauges
The depth gauge setting is lowered
when the cutter is sharpened.
N Check the depth gauge setting after
each sharpening
N Lay the appropriate file gauge (1)
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
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
not be filed; otherwise, this could
increase the tendency of the chain saw
to kick back.
N Rework the depth gauge so that it is
flush with the file gauge
N Afterwards, dress the leading edge
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
689BA023 KN
a
Chain pitch Depth gauge
Distance (a)
Inches (mm) mm (Inches)
1/4 P (6.35) 0.45 (0.018)
1/4 (6.35) 0.65 (0.026)
3/8 P (9.32) 0.65 (0.026)
0.325 (8.25) 0.65 (0.026)
3/8 (9.32) 0.65 (0.026)
0.404 (10.26) 0.80 (0.031)
2
689BA061 KN
1
689BA051 KN
689BA044 KN