0458-729-8621-A
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20 Inspection and Maintenance
The chain pitch marking (a) is embossed in the area of the
depth gauge of each cutter.
The markings mean the following:
To sharpen the saw chain:
► Switch off the chain saw, engage the chain brake and
disconnect the saw from the power supply.
► Select a saw chain file with a diameter matching the pitch
of the saw chain.
Other files are unsuitable and can result in improperly filed
chain, which can increase the potential and force of
kickback or other reactive forces.
► Clamp the guide bar if necessary to make filing easier.
► To advance the saw chain, first disengage the chain
brake, @ 12.2.
► Use a file holder.
File holders have markings that indicate the proper
sharpening angle.
► File all the cutters with an identical angle. Two or three
strokes of the file are usually sufficient for simple
resharpening. Remove a little material with each stroke.
Sharpening at varying or inconsistent angles or heights
can be very dangerous and may result in rough or uneven
running of the saw chain and increased wear, even to the
point of saw chain breakage. It also can increase the
tendency of the chain saw to kickback and increase
kickback and other reactive forces.
► Guide the file horizontally at a right angle to the side
surface of the guide bar in accordance with the specified
angle.
► File only from the inside of the cutter outward.
► Lift the file on the backstroke. The file only sharpens on
the forward stroke.
► 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.
Marking (a) Saw Chain Pitch
11/4"
2 .325"
33/8"
4 .404"
6 3/8" PICCO
7 1/4" PICCO
a
0000-GXX-1446-A0
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