Stihl HTA 135 Owner's Instruction Manual page 47

23 Inspection and Maintenance
Marking (a)
1
2
3
4
6
7
To sharpen the chain:
► Switch off the pole pruner and remove the battery.
► Select a chain file with a diameter matching the pitch of
the chain.
Other files are unsuitable and can result in improperly filed
chain, which can increase the potential and force of
kickback and other reactive forces.
► Clamp the guide bar if necessary to make filing easier.
► 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 chain and increased wear, even to the point
of chain breakage. It also can increase the tendency and
force of kickback and other reactive forces.
0458-698-8621-A
Saw Chain Pitch
1/4"
.325"
3/8"
.404"
3/8" PICCO
1/4" PICCO
► 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 filed down to the
length of the shortest cutter. Otherwise, the tendency and
force of kickback and other reactive forces will increase.
STIHL recommends having your 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 potential and
force of kickback and other reactive forces, which can
increase the risk of serious personal injury. Always maintain
the proper distance between the depth gauge and the top of
the cutter (a).
The depth gauge determines the depth to which the cutter
penetrates the wood and thus the chip thickness.
English
a
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