34
Checking the blade
Warning
Wear or damage on the blades and the
fastening elements can result in the blades
or the fastening elements coming off.
► Check the blades and all fastening ele-
ments according to the following instruc-
tions.
Warning
There is a considerable risk of injury due to
improperly mounted and maintained blades.
► Work at blades must be carried out by an
authorised service centre.
Use solid gloves when you check
the blade.
Work on the blade requires specific expertise
because an imbalance inspection is necessary
and torques must be observed.
Blades that are sharpened improperly increase
the workload of the device and can result in vi-
bration cracks or breaks.
Check the blade and all fastening elements for
wear, damage and cracks
– each time before and after you mow.
– in case of noticeable changes or unusual vi-
brations.
Contact an authorised service centre if you de-
tect faults or damage during inspection.
All shown blade parts and their fastening ele-
ments must be changed
– if damage or cracks are detected.
– if unusually strong vibrations occur.
– at least once a year or every 50 operating
hours, no matter if wear does exist or not.
The material weakens, can suffer cracks, en-
dangering people and material assets. Ejected
broken pieces can cause severe injuries.
Unusual vibrations are an indication that
– blades are missing or broken,
– the blade is worn excessively or on one side
or
– damage to the engine or cutter deck fasten-
ing.
Blade change
1
2
1
1
1
2
2
2
It is absolutely necessary to change the blade:
– When one of the wear markings (
1
) was
reached. Original blades 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).
Original blade
An original AS-blade is engraved with:
AS XXXXXXXX
The engraving shows 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.
