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0478 111 9926 C - EN
38
Place the machine in the cleaning
position.
Open the quick-clamping devices (1)
and fold down the handlebar (2) to the
rear.
Lift up the machine at the front and
place in the cleaning position as shown.
12.2 Checking blade wear
Maintenance interval:
Before each use.
Checking procedure
Place the machine in the cleaning
position. (Ö 12.1)
Clean the blade (1) and check it for
damage (notches or cracks).
Use a slide calliper (2) to measure the
blade thickness (A) at several points.
Measure the permissible grinding (B).
Place a ruler (3) against the front blade
edge as shown for this purpose.
Wear limits
The blade thickness (A) must be at least
2mm at any point. The most important
points are marked in the illustration.
The cutting edges must not be ground
back by more than 5mm – distance (B)
(permissible grinding) during sharpening.
12.3 Sharpening the mowing blade
If you do not have the necessary expertise
or auxiliary equipment, we recommend
that you have the blade sharpened by a
specialist dealer. Operation of the machine
is impaired in the case of an incorrectly
sharpened blade (incorrect sharpening
angle, imbalance etc.).
Sharpening instructions
Remove the mowing blade. (Ö 12.4)
Cool the mowing blade during
sharpening, e.g. with water.
The blade must not be allowed to
display blue colouring, as this would
reduce its cutting quality.
Sharpen blades evenly to prevent
vibration due to imbalance.
Observe a sharpening angle of 30°.
Observe the wear limits (Ö 12.2).
12.4 Removing and installing the
mowing blade
Removing
Hold the mowing blade (1) and loosen
the blade fastening screw (2).
Remove the blade fastening screw (2),
retaining washer (3) and mowing
blade (1).
Installing
Clean the blade contact surface and
blade bushing (4).
Secure the blade fastening screw (2)
with Loctite 243.
Place the mowing blade (1) on the
blade bushing (4) as shown.
Position the retaining washer (3) as
shown and tighten with the blade
fastening screw (2) to 60 - 65 Nm.
Risk of injury!
Stop the engine, allow the machine
to cool and detach the spark plug
socket.
Empty the fuel tank (run empty)
before placing the machine in the
cleaning position.
Risk of injury!
Blades are subjected to differing
degrees of wear depending on the
location and duration of use. If you
use the machine on sandy ground
or use it frequently under dry
conditions, the blade will be
subjected to greater loads and will
wear more quickly than the
average.
A worn blade may break off and
cause serious injuries. The
instructions for blade maintenance
must therefore always be
observed.
13
Risk of injury!
Always wear gloves.
The mowing blade must
be replaced if notches or
cracks are detected or if a wear
limit is reached (Ö 12.2).
Risk of injury!
The prescribed tightening torque
for the blade fastening screw must
be observed.
The retaining washer (3) must be
replaced each time the blade is
installed.
The blade fastening screw (2) must
be renewed each time the blade is
replaced.
14
40


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