29
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.
Changing the blade
1
1
1
1
2
2
3
3
4
6
5
5
Fig. 8:
Cutting blades (5)
The cutting blades should move easily. To en-
sure this, always keep the pivotal point (
3
)
clean. Never mow when the cutting blades are
stuck.
Caution!
To prevent unbalance replace or re-
verse the cutting blades in pairs only!
The cutting blades are reversing blades. Re-
verse both cutting blades
– when one of the wear marks (
1
) was
reached.
– when the second cutting edge of the cutting
blade has not been used yet.
It is absolutely necessary to change the cutting
blades and the fastening parts
– when one of the wear marks (
1
) of the
second cutting edge was reached.
– when the thickness of the cutting blade at
any point is below 1 mm (exception: cutting
edge).
Mulching blade (6)
The mulching blade and the fastening parts
must be changed
– when one of the wear marks (
1
) was
reached.
– when the thickness of the blade at the rear
edge (
2
) or at any other point is below 1 mm
(exception: cutting edge).
