Lubricating The Gearbox; Sharpening Instructions - Stihl HL 91 K Manual De Instrucciones

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2
Fit cap (1), insert and tighten
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screw (2)
HL 91 K

Lubricating the Gearbox

Blade Drive Gear
Lubricate the blade drive gear with
STIHL gear lubricant for hedge trimmers
– see "Special Accessories".
HL 0° version
Check the lubricant level at regular
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intervals of about every 25 hours of
operation. Unscrew the filler
plug (1) – if no grease can be seen
on the inside of the filler plug, screw
the tube of grease into the filler hole.
Squeeze up to 10 g (2/5 oz) grease
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into the gearbox.
NOTICE
Do not completely fill the gearbox with
grease.
Unscrew the tube of grease from the
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filler hole.
Refit the filler plug and tighten it
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down firmly.

Sharpening Instructions

When cutting performance and behavior
begin to deteriorate, i.e. blades
frequently snag on branches:
Resharpen the cutting blades.
It is best to have the cutting blades
resharpened by a dealer on a workshop
sharpener. STIHL recommends an
authorized STIHL servicing dealer.
It is also possible to use a flat crosscut
sharpening file. Hold the sharpening file
at the prescribed angle (see
"Specifications").
Only sharpen the cutting edges –
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take care not to file the cutter guard
(see "Main Parts").
Always file towards the cutting
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edge.
The file only sharpens on the
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forward stroke – lift it off the blade
on the backstroke.
Use a whetstone to remove burr
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from cutting edge.
Remove as little material as
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possible.
After sharpening, clean away filing
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or grinding dust and then spray the
cutting blades with STIHL resin
solvent.
NOTICE
Do not operate your machine with dull or
damaged cutting blades. This may
cause overload and will give
unsatisfactory cutting results.
English
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