Maintenance; Cleaning The Machine; Removing The Feed Chute Ato; Removing The Blade Discs - Stihl GHE 420 Manuel D'utilisation

11. Maintenance

Risk of injury:
Carefully read the section "For your
safety" ( 4.), particularly the
subsection "Maintenance and
repairs" ( 4.7), and follow all
safety instructions exactly before
performing any maintenance or
cleaning operations on the
machine.
Disconnect the mains plug before
performing any maintenance
operations.

11.1 Cleaning the machine

Risk of injury:
If the blade discs are covered with
shredding material, use a brush or
similar to remove this shredding
material.
Do not wipe the housing with your
hand. Risk of injury from the
blades.
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.
It is only permitted to clean the machine in
the position shown.
● Remove the feed chute. (
Remove dirt from the cooling air guide
(inlet slots) on the motor housing to ensure
that the motor is adequately cooled.
0478 201 9916 A - EN
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.
11.2 Removing the feed chute
ATO 400
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Risk of injury:
Switch off the machine. Disconnect
the mains plug 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.
( 7.5)
● Disconnect the power cable. (
● Unscrew the On / Off switch (1) and
remove.
● Fold the feed chute ATO 400 (2)
backwards and remove.
11.2)
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.

11.3 Removing the blade discs

Risk of injury:
Always wear gloves.
Do not touch the blades
until they have come to a
standstill.
● Remove the feed chute ATO 400.
( 11.2)
1 Unscrew the blade fastening screw:
20
● 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).
In order to prevent injuries, the
blade cover must always be
attached when loosening the blade
fastening screw (see view Z).
● Install the blade cover. (
● Insert the assembly tool (1) into the
10.3)
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. (
● Remove the blade fastening screw (2),
lock washer (4) and clamping ring (5).
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7.5)
7.4)
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