Engine; Checking The Mowing Blade Wear Limit; Maintaining The Mowing Blade - Viking MB 248 T Instruction Manual

11.3 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.
11.4 Checking the mowing blade
wear limit
Risk of injury!
Observe the safety instructions in
the section "For your safety". (
Maintenance interval:
Before each use.
Check procedure:
The mowing blade (1) must be cleaned
thoroughly before each check procedure.
● Place the machine in the cleaning
position. ( 11.2)
42
Mowing blade thickness:
The blade thickness (A) must be at least
2 mm at any point. The most important
points are marked in the illustration.
(Check using slide calliper).
Wear limit of the cutting edges:
The cutting edges must not be ground
back by more than 5 mm (distance (B))
during sharpening. When checking, place
a ruler (2) against the front blade edge (3)
and check for wear.
11.5 Maintaining the mowing
blade
Risk of injury!
Observe the safety instructions in
the section "For your safety". (
We recommend that you have the
mowing blade sharpened by a
specialist dealer.
Maintenance interval:
12
Every 25 operating hours.
Removing the mowing blade:
For removal, use a wooden block (1)
(approx. 60 x 60 mm) to counterhold the
4.)
mowing blade (2).
● Loosen and unscrew the blade
fastening screw (3). Remove the blade
fastening screw (3), washer (4) and
mowing blade (2).
Sharpening the mowing blade
Risk of injury!
Always wear safety glasses and
gloves when sharpening.
The following points must be observed
when re-sharpening mowing blades:
● 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 blades evenly to prevent
vibration due to imbalance.
● The cutting angle of 30° must be
observed.
● Observe the wear limits when
sharpening.
Risk of injury!
When resharpening the mowing
blade, it is essential that the wear
13 limits and the cutting angle of 30°
are observed.
The mowing blade must be
replaced if notches or cracks are
detected, or if the specifications
4.)
contained in the section "Checking
the mowing blade wear limit" are
exceeded.
Installing the mowing blade:
Install the mowing blade (2) with the
curved edges pointing upwards.
For installation, use a wooden block (1)
(approx. 60 x 60 mm) to counterhold the
mowing blade (2).
● Install the mowing blade (2) on the
blade mount (5) and tighten the blade
fastening screw (3) with retaining
washer (4) to a torque of 60 - 65 Nm.
0478 111 9920 B - EN