User Manual

0478 216 9906 B - EN
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Maintenance interval:
After each use
Clean the machine thoroughly each time it
has been used. Care of the machine will
protect it against damage and extend its
service life.
Never spray water onto
motor or engine components,
seals, bearing points or
electrical parts such as
switches. This would result in
expensive repairs.
If you are unable to remove
the dirt and accumulated
deposits with a brush, a damp
cloth or a stick, STIHL
recommends the use of a
special cleaner (e.g. STIHL special
cleaner).
Do not use aggressive cleaning agents.
Clean the blade discs regularly.
Remove dirt from the cooling ribs, fan
wheel, area around the air filter, exhaust,
etc. to ensure that the engine is
adequately cooled.
12.2 Removing the feed chute
ATO 400
● Release the On / Off switch (1) until the
feed chute ATO 400 (2) can be folded
to the rear.
● Remove the feed chute ATO 400 (2).
12.3 Removing the blade discs
● Remove the feed chute ATO 400.
(Ö 12.2)
1 Unscrew the blade fastening screw:
● Position the assembly tool (1) on the
blade fastening screw (2) and turn anti-
clockwise slowly and carefully until the
blade discs are stopped by the stop.
Detach the assembly tool (1).
● Install the blade cover. (Ö 7.4)
● Insert the assembly tool (1) into the
bore of the blade cover (3) and position
on the blade fastening screw (2).
● Loosen the blade fastening screw (2)
using the assembly tool (1) and
unscrew completely.
● Remove the blade cover. (Ö 7.3)
● Remove the blade fastening screw (2),
lock washer (4) and clamping ring (5).
2 To remove the wing blade and blade
disc for soft material:
● Remove the short wing blade (6) and
long wing blade (7).
● Lift off the soft material blade disc (8).
3 Remove the insert:
● Unscrew and remove the screws (9).
Lift off the insert (10).
4 To remove the blade holder and
blade disc for hard material:
● Tighten the screw (11) using the
assembly tool (1) and in doing so
detach the blade holder (12).
● Unscrew and remove the screw (11).
● Remove the blade holder (12) together
with the clamping ring (13).
● Lift off the hard material blade disc (14).
Risk of injury:
Switch off the machine. Detach the
spark plug socket before
unscrewing the On / Off switch (1).
Always wear thick gloves.
If it is not possible to perform any
work on the blade discs after
removing the feed chute, always fit
the blade cover for safety reasons.
(Ö 7.4)
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The locking device for the blade
discs is activated automatically
after the chute has been removed.
When locked, the blade disc is still
able to turn approx. 360° as far as
the stop.
Risk of injury:
Always wear gloves.
Never touch the blades
until they have come to a
standstill.
Detach the spark plug socket.
In order to prevent injuries, the
blade cover must always be
attached when loosening the blade
fastening screw (see view Z).
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