Instruction Manual

0458-683-8621-A
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English 22 Inspection and Maintenance
Sharpen the cutting blades when cutting performance
begins to deteriorate, i.e., blades frequently snag on
branches or fail to cut material cleanly.
To sharpen the cutting blades with a file:
► Sharpen each cutting edge of the upper cutting blade with
a sharpening file. Always file toward the cutting edge with
a forward motion matching the sharpening angle, @ 24.3.
Sharpen on the forward stroke. Lift off the blade on the
backstroke.
► Only sharpen the cutting edges. Do not file blunt
projecting parts of the cutting attachment, or the cutting
blade guard. Make sure your sharpening stroke matches
the sharpening angle, @ 24.3.
► Turn the hedge trimmer over.
► Use a whetstone to remove any burrs from the cutting
edges. Remove as little material as possible.
► After sharpening, wipe away filing or grinding dust with a
dry or slightly dampened cloth and then spray the cutting
blades with a resin solvent, such as STIHL Resin
Remover and Lubricant.
If you make a warranty claim for a component which has not
been serviced or maintained properly, coverage may be
denied.
NOTICE
Operating the machine with dull or damaged cutting blades
may overload the motor. Keeping the cutting blades sharp
helps maintain cutting performance and the expected life of
the product.
22.3 Lubricating the Gearbox
WARNING
The gearbox becomes hot during operation. To reduce the
risk of burn injury, avoid contacting the gearbox while it is
still hot following operation. Wait for the gearbox to cool
down before performing this operation.
To lubricate the gearbox:
► Remove the screw plug (1).
► If you have an adjustable cutting attachment: Remove the
screw plug (3).
► If no grease can be seen on the inside of the screw plug,
screw the tube (2) of STIHL gear lubricant into the filler
hole.
► Squeeze no more than 0.2 oz. (5 g) of STIHL gear
lubricant into the gearbox.
► Remove the tube of STIHL gear lubricant.
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