Checking Blade Wear; Removing And Installing The Blade - Viking MB 650 T Manual De Instrucciones

Risk of injury!
Stop the engine, detach the spark
plug socket and allow the machine
to cool down.
Empty the fuel tank (run empty)
before placing the machine in the
cleaning position.
The machine is only safely in the
cleaning position when the
discharge flap is open.
Cleaning position:
● Detach the recoil starter rope from the
rope guide. ( 8.3)
● Remove the mulch insert (
detach the grass catcher box. (
● Stand to the right of the machine to tilt it
upwards.
● Set the upper handlebar to the lowest
position (as far as the stop, the detent
lever does not engage in this position).
( 9.3)
● Open the discharge flap (2) with the
right hand and hold it open.
● Hold the console with the left hand as
shown and hold the discharge flap
open. Press the detent lever (3) with the
thumb at the same time and hold.
● Hold the machine with the right hand at
the front carrying handle and tilt it slowly
rearwards until the handlebar is in
contact with the ground as shown.
● Release the discharge flap (2) and
detent lever (3) and check that the
machine is standing securely.
52
All manuals and user guides at all-guides.com
Notes on cleaning:
● Clean off dirt using little water, with a
brush or with a cloth. Never spray water
onto engine components, seals or
bearing points. If necessary, use a
special cleaner (e.g. STIHL special
cleaner).
● First, remove accumulated clipping
deposits using a stick.
● Always clean the mowing blade – under
no circumstances should you hit the
mowing blade (e.g. with a hammer) to
loosen dirt.
8.5) or
● Clean the engine cooling ribs.
9.6)
● Clean the grass catcher box and mulch
insert using running water and a brush
well away from the machine.

14.3 Checking blade wear

Maintenance interval:
Before each use
Risk of injury!
Blades are subjected to differing
degrees of wear depending on the
location and duration of use. If you
use the machine 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. A worn blade may break
off and cause serious injuries. The
instructions for blade maintenance
must therefore always be observed.
● Tilt the mower upwards into the
cleaning position. (
● Clean mowing blade (1).
● Use a slide calliper to measure blade
thickness A at 5 points at least. In
particular, minimum thickness must
also be ensured in the area of the blade
wings.
● Check the minimum width B at the
narrowest point behind the blade wings
using a slide calliper.
Blade thickness A: > 2,0 mm
Minimum width B: > 55 mm
The blade must be replaced,
– if it is damaged (notches, cracks),
– if the measured values are achieved at
one or more points or are outside the
permissible limits.
If an accessory blade is installed on the
lawn mower, different wear limits apply
(see accessory instruction manual).
23
14.4 Removing and installing the
blade
Removing the blade:
● Tilt the mower upwards into the
cleaning position. (
● Hold blade (1) and unscrew blade
fastening screw (2).
● Remove blade (1), blade fastening
screw (2) and retaining washer (3).
14.2)
24
24
14.2)
0478 111 9931 B - EN