Removing And Installing The Blade; Checking The Balance Of The Blade; Sharpening The Mowing Blade; Sharpening Instructions - Viking MB 545.0 Manuel D'utilisation

Permissible grinding B: < 5 mm
2 Wear limits for multi-blade
(MB 545 VM):
Blade thickness A: > 2 mm
Minimum width C: > 40 mm
14.5 Removing and installing the
blade
Removing:
● Use a suitable wooden block (1,
approx. 60x60 mm) to counterhold
blade (2).
● Unscrew blade fastening screw(s) (3)
using an A/F 17 spanner.
● Remove blade (2), blade fastening
screw(s) (3) and retaining washer (4) or
guard plate (5, MB 545 VS).
● MB 545 VM: The multi-blade (2)
comprises an upper blade (2a) and a
lower blade (2b). It can be separated for
convenient re-sharpening.
Installing:
Risk of injury!
The blade (2) must only be installed
as shown. The curved wings must
point upwards.
Observe the specified torque when
tightening the blade fastening
screw(s), as the secure attachment
of the cutting tool depends on this.
Additionally secure blade fastening
screw(s) (3) with Loctite 243.
Replace spring washer (4) each
time the blade is installed and blade
fastening screw(s) (3) each time
the blade is replaced.
56
● Clean the blade contact surface and
blade bushing.
● Check the balance of the blade.
( 14.6)
● MB 545 VM: Hook upper blade (2a)
into lower blade (2b) as shown in the
illustration. Ensure that the bores in
both blades are aligned.
● Install blade (2) with the curved wings
29
pointing upwards (towards the
30
machine).
● Use a suitable wooden block (1,
approx. 60x60 mm) to counterhold
blade (2).
● Install blade fastening screw(s) (3) with
a new retaining washer (4) and with
guard plate (5, MB 545 VS) and
tighten.
Tightening torque:
60 - 65 Nm
MB 545 VS: 45 - 55 Nm
14.6 Checking the balance of the
blade
● Remove the blade. (
● MB 545 VM: Assemble the multi-blade
before checking. (
● 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. (

14.7 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 (
● 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. (
31
14.5)

14.8 Engine

Maintenance interval:

14.5)
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
14.7)
and air filter regularly.
14.5).
14.4)
0478 111 9930 A - EN