21
Checking the blade
Danger!
Improperly mounted and main-
tained blades pose a severe injury
hazard.
Work at the blade shall only be
performed by an authorised service
centre.
Work on the blade requires special qualifica-
tions because an unbalance test is required
and the torques must be observed.
Check the blade and all fastening parts for
wear, damage and cracks
– before and after each mowing operation.
– when there are significant changes.
All blade parts shown and their fastening parts
must be changed
– when damage or cracks were found.
– At least once a year or every 50 operating
hours, regardless of whether there is wear or
not. Material wears out, gets cracks which
can endanger persons or property.
Vibrations indicate that
– the blade is worn excessively on one side or
– damage of motor or cutting unit mount (e.g.
rubber elements).
Improperly sharpened blades increase the
device load and result in fatigue cracks and
breakage.
Ejected pieces can cause severe injuries.
Blade change
1
1
2
2
It is absolutely necessary to change the blade:
– When one of the wear markings (
1
) was
reached. Original blade are engraved with
wear markings (marking in form of a ball-
shaped imprint on the rear side of the
blade).
– When the thickness of the blade at the rear
edge of the vane(
2
) or at another point is
below 1 mm (exception: cutting edge).
An original AS blade can be recognised by
these imprints:
XXXX corresponds to the
spare part number.
Checking the blade clutch
Check the blade clutch for proper function by
disengaging the blade. The blade must come
from full speed to a standstill in less than
7 seconds. Contact an authorised service
centre if this is not the case.
Storage
Storing the device
Keep the device in a closed, dry, and well
ventilated room and out of reach of children.
Always eliminate all problems of the device
before you store it so that the device is always
in a safe-to-operate state. Let the engine cool
down before you store the device in closed
rooms.
