19 Maintenance
► Clean the discharge chute with a soft brush or
a damp cloth.
► Remove any foreign bodies from the battery
compartment and clean the battery compart‐
ment with a damp cloth.
► Clean the electrical contacts in the battery
compartment with a paintbrush or a soft brush.
► Clean the ventilation slots with a paintbrush.
► Upend the lawn mower.
► Clean the area around the blade and the blade
with a stick, a soft brush or a damp cloth.
NOTICE
■ Using a high-pressure cleaner or a water jet
for cleaning can damage the machine.
► Do not clean the machine with a high-pres‐
sure cleaner or a water jet.
18.3
Cleaning the Battery
► Clean the battery with a damp cloth.
19 Maintenance
19.1
Removing and Attaching the
Blade
19.1.1
Removing the Blade
► Switch the lawn mower off, pull out the activa‐
tion key and remove the battery.
► Upend the lawn mower.
► Block blade (1) using a piece of wood (2).
► Unscrew screw (3) in the direction of the arrow
and remove together with washer (4).
► Remove blade (1).
► Discard screw (3) and washer (4).
Use a new screw and washer to attach
blade (1).
19.1.2
Attaching the Blade
► Switch the lawn mower off, pull out the activa‐
tion key and remove the battery.
► Upend the lawn mower.
0478-131-9946-D
► Lay new washer (1) on new screw (2) with the
convex side facing outwards.
► Apply Loctite 243 thread locker to the thread
of screw (2).
► Position blade (3) so that the raised areas on
contact area (4) engage in notches (5).
► Screw in screw (2) together with washer (1).
► Block blade (1) using a piece of wood (2).
► Tighten screw (3) to 65 Nm.
19.2
Sharpening and Balancing the
Blade
Sharpening and balancing the blade correctly
requires a lot of practice.
STIHL recommends having the blade sharpened
and balanced by a STIHL specialist dealer.
WARNING
■ The cutting edges of the blade are sharp. This
may result in the user cutting themselves.
► Wear work gloves made from resistant
material.
► Switch the lawn mower off, pull out the activa‐
tion key and remove the battery.
► Upend the lawn mower.
► Remove the blade.
► Sharpen the blade. Observe the sharpening
angle and cool the blade,
Bluing of the blade during sharpening is not
permitted.
► Attach the blade.
English
22.2.
39