26
Checking the blade
Danger!
Improperly mounted and maintained
blades pose a severe injury hazard.
Work at the blade shall only be per-
formed by an authorised service
centre.
Use solid gloves when you check
the blade.
Work at the blade requires specific expertise
because an unbalance inspection is necessary
and the torques must be observed.
Check the blade and all fastening elements for
wear, damage and cracks
– each time before and after you mow.
– if there are noticeable changes.
All shown blade parts and their fastening ele-
ments must be changed
– if damage or cracks are detected.
– at least once a year or every 50 operating
hours, no matter if wear does exist or not.
The material weakens, can suffer cracks,
endangering people and material assets.
Vibrations are an indication that
– the blade is worn excessively or on one side
or
– damage to the engine or cutter deck fasten-
ing.
Blades that are sharpened improperly increase
the workload of the devices and can result in
vibration cracks or breaks.
Ejected broken pieces can cause severe injur-
ies.
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 GXXXXXXXX or EXXXXX
This 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.
