Bedienungsanleitung Viking ME 339C (Seite 40 von 454) (Alle Sprachen)

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Remove dirt from the cooling air guide

(inlet slots) between the motor cover and

the lower housing to ensure that the motor

is adequately cooled.

Clean the mowing blade.

Clean the underside of the mower with

water and a brush. Detach accumulated

cutting deposits in the housing and in the

ejection chute beforehand using a stick.

Never spray water onto motor

components, seals, bearing points or

electrical parts such as switches. This

would result in expensive repairs.

If you are unable to remove the dirt with

water using a brush or a cloth, VIKING

recommends the use of a special cleaner

(e.g. STIHL special cleaner).

12.3 Electric motor and wheels

The electric motor is maintenance-free.

The wheel bearings are maintenance-free.

12.4 Upper handlebar ME 339

Maintenance interval:

Before each use

The upper handlebar is coated with a

insulating layer. Should this layer become

damaged, the upper handlebar must be

replaced.

12.5 Mowing blade maintenance

Maintenance interval:

Before each use

● Tilt mower upwards into cleaning

position (Ö 12.2).

● Clean mowing blade (1) and check it for

damage (notches or cracks) and wear;

replace if necessary.

● Use a slide calliper (2) to measure

blade thickness at 5 points at least. In

particular, minimum thickness must

also be ensured in the area of the blade

wings.

● Place a ruler (3) against the front blade

edge and measure permissible

grinding.

Wear limits:

The blade thickness must be at least

1.6 mm at any point.

The cutting edges may not be ground back

by more than 5mm during sharpening.

If the supplied standard blade is not

installed in the lawn mower, but e.g. the

mulching blade, which is available as a

special accessory, different wear limits

apply (see instruction manual Kit 339).

12.6 Removing and installing

mowing blade

1 Removing:

● Use a suitable wooden block (1) to

counterhold mowing blade (2).

● Unscrew blade fastening screw (3) and

remove mowing blade (2).

Risk of injury:

A worn or damaged blade may

break off and cause serious

injuries. The instructions for blade

maintenance must therefore always

be observed.

In particular, the lawn mower must

not be operated if parts of the

cutting unit (comprising the mowing

blade, blade fastening screw and

blade mounting) are damaged or

worn.

Blades are subjected to differing

degrees of wear depending on the

location and duration of use. If you

use the mower 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.

Always replace the blade fastening

screw (4) when replacing the

mowing blade.

In order to prevent damage to the

blade fastening screw, use a

suitable hexagon socket (22 mm)

for loosening and tightening.

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