Viking MB 650 T Instruction Manual Download

Page: 55 / 394

0478 111 9931 B - EN

Installing the blade:

●

Clean the blade contact surface and
blade bushing or blade holder.

●

Position blade (1) on the blade bushing
or blade holder (5) with the curved
wings pointing upwards (towards the
machine).

●

Fit a new retaining washer (3) as
shown, screw in and tighten blade
fastening screw (2).
Tightening torque:

60 - 65 Nm

4.5 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 (

14.4).

●

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. (

14.3)

4.6 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.

4.7 Wheels and gearbox

The wheel bearings are maintenance-free.

The gearbox is maintenance-free.

4.8 Blade brake clutch (MB 650 VS,

MB 655 VS, MB 655 YS)

Maintenance interval:
once a year

The blade brake clutch (BBC) is subject to
natural wear.
It may only be maintained by trained
personnel. VIKING recommends VIKING
specialist dealers.

4.9 Adjusting the self-

propulsion cable (MB 655 YS)

Maintenance interval:
Prior to initial use or as required

Adjustment of the cable is necessary

– before the machine is operated for the

first time

– if the maximum speed is not achieved

– 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.

Adjusting the cable

●

Pull driving speed lever (1) all
the way back.

●

Loosen nuts (2, 3) to release
the tension on cable (4).

●

Start the engine. (

13.4)

●

Pull the self-propulsion lever to the
handlebar and hold. (

13.8)

●

Tension cable (4) using nut (3) until
self-propulsion is activated. Then
release the self-propulsion lever, stop
the engine and tighten nut (2).

Risk of injury!

The blade (1) must only be installed
as shown. The tabs (4) must face
downwards and the curved wings
must point upwards.

Observe the specified torque when
tightening the blade fastening
screw, as the secure attachment of
the cutting tool depends on this.
Additionally secure the blade
fastening screw (2) with

Loctite 243

Replace retaining washer (3) each
time the blade is installed and the
blade fastening screw (2) each time
the blade is replaced.