Viking MB 545, Instruction Manual

Page: 52 / 382

0478 111 9932 B - EN
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● Clean the blade contact surface and
blade bushing.
● Check the balance of the blade.
(
Ö 12.5)
● Install blade (2) with the curved wings
pointing upwards (towards the
machine).
● Use a suitable wooden block (1,
approx. 60x60 mm) to counterhold
blade (2).
● Install blade fastening screw (3) with a
new retaining washer (4) and tighten.
Tightening torque:
60 - 65 Nm
1 2.5 Checking the balance of the
blade
● Remove the blade. ( Ö 12.4)
● Guide screwdriver (1) through central
bore (2) of blade (3) and align the
mowing blade horizontally.
If the blade is properly balanced it will
remain in this horizontal position.
● If the blade leans to one side, re-
sharpen this side until the blade is
evenly balanced. (
Ö 12.6)
1 2.6 Sharpening the mowing blade
VIKING recommends having the mowing
blade sharpened by a technician.
Operation of the machine is impaired in the
case of an incorrectly sharpened blade
(incorrect sharpening angle, imbalance
etc.).
Sharpening instructions:
● Remove mowing blade ( Ö 12.4).
● Cool the mowing blade when
sharpening, e.g. with water. The blade
must not be allowed to display blue
colouring, as this would reduce its
cutting quality.
● Sharpen the blade evenly to prevent
vibrations due to imbalance.
● Observe sharpening angle of 30°.
● After sharpening, remove any
sharpening burr at the cutting edge
using fine sandpaper if necessary.
● Observe the wear limits. ( Ö 12.3)
1 2.7 Adjusting the self-
propulsion cable
Maintenance interval:
As required
The tension of the cable is adjusted
correctly at the factory.
Adjustment of the cable is necessary
– if, after a lengthy period of use, self-
propulsion does not engage properly
when the self-propulsion lever is
actuated.
– if self-propulsion is permanently
engaged. This means that the lawn
mower automatically begins to move
when the recoil starter rope is pulled,
despite the self-propulsion lever not
being actuated.
Checking the cable tension:
● Actuate the self-propulsion lever while
pulling the lawn mower backward.
The drive wheels must lock after
approx. one third of the lever travel.
Adjusting the cable:
● The cable tension is increased by
turning adjustment screw (1) on the left
on the upper handlebar in the "
+ "
direction and reduced by turning the
screw in the "
– " direction.
1 2.8 Engine
Maintenance interval:
See engine instruction manual.
General information:
Observe the operating and maintenance
instructions contained in the attached
engine instruction manual.
To achieve a long service life, it is always
particularly important to maintain a
sufficient level of oil and to change the oil
and air filter regularly.
The recommended oil change intervals as
well as information on engine oil and oil
capacities can also be found in the engine
instruction manual.
The cooling ribs must always be kept clean
to ensure that the engine is adequately
cooled.
1 2.9 Battery and charger maintenance
Maintenance interval:
See engine instruction manual.
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Risk of injury!
The self-propulsion cable must be
correctly adjusted before the
machine is operated. If necessary,
consult a specialist dealer. VIKING
recommends VIKING specialist
dealers.
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