Stihl MSA 120 C Instruction Manual page 55

24 Inspection and Maintenance
► Do not file tie straps or drive links.
► Periodically rotate the file in order to avoid uneven wear.
► To remove a file burr from the cutter tooth, run the cutter
across a piece of hardwood.
► Check the sharpening angle with a file gauge.
All cutters must be of equal length and be filed down to the
length of the shortest cutter. Otherwise, the kickback
tendency of the chain saw and kickback and other reactive
forces will increase.
STIHL recommends having your saw chain sharpened by an
authorized STIHL servicing dealer to reduce the risk of
severe or fatal injury from an improperly sharpened chain.
WARNING
Depth gauges that are too low increase the kickback
tendency of the chain saw and can increase kickback and
other reactive forces, which can increase the risk of serious
personal injury. Always maintain the proper distance (a)
between the depth gauge and the top of the cutter.
The depth gauge determines the depth to which the cutter
penetrates the wood and thus the chip thickness.
A depth gauge that is too low will increase the kickback
tendency of the chain saw and can increase kickback forces.
A depth gauge that is too high will prevent the cutter from
entering the workpiece and will lead to poor cutting
performance. Always keep the required distance (a)
between depth gauge and cutting edge, @ 26.5.
0458-716-8621-C
To properly lower the depth gauge:
► Lay the appropriate file gauge 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 filed down.
► File the depth gauge so that it is flush with the file gauge.
► Afterwards, remove the file gauge and file the leading
edge of the depth gauge parallel to the service mark.
When doing this, be careful not to further lower the highest
point of the depth gauge.
a
► Lay the file gauge on the saw chain to check the height of
the file gauge. The highest point of the depth gauge must
be flush with the file gauge.
► After sharpening, clean the saw chain thoroughly,
removing any filings or grinding dust.
► Oil the saw chain thoroughly.
English
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