Blade Maintenance - Viking GB 370 S Manuel D'utilisation

11.3 Blade maintenance

Risk of injury!
Always wear thick
gloves.
Maintenance interval:
Before each use
● Remove the feed chute. (
● Check the blades for damage (notches
or cracks) and wear; reverse or replace
if necessary.
Wear limits of the blades:
The blades must be reversed or
replaced before the specified wear
limits are reached. VIKING
recommends VIKING specialist
dealers.
● On the blades, measure the distance
between the bore to the edge of the
blade at several points.
Minimum distance 6 mm
Reversing the blades:
The cutting blades are designed as
reversible blades. This means that
blunt blades can be reversed and
the machine is ready for use again.
Always reverse both blades.
● Remove the blade disc. (
● Unscrew screws (1) and remove
together with nuts (2).
● Remove blade (3) upwards.
● Clean the blade disc.
● Reverse blade (3) and place onto the
blade disc with the sharp edge exposed
and align the bores.
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● Insert screws (1) through the bores and
screw on nuts (2). Tighten nuts (2) to
22 - -28 Nm.
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● Install the blade disc. (
Sharpening the blades:
Blades which are blunt on both sides must
be sharpened before resuming work.
In order to ensure optimum machine
operation, the blades should only be
7.8)
sharpened by a technician. VIKING
recommends VIKING specialist dealers.
● Remove the blades for sharpening.
● Cool the blades 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.
● Check blades for damage before
installing: The blades must be replaced
if notches or cracks are visible or if the
blades have reached the wear limits.
● Sharpen blades at a sharpening angle
of 30°.
● Sharpen the blades against the cutting
edge.
● After sharpening, remove any
sharpening burr at the cutting edge
using fine sandpaper.
7.6)
● Observe the tightening torques
contained in the "Reversing the blades"
section when installing the blades.
11.4 V-belt maintenance
7.5)
Maintenance interval:
Every 10 operating hours
Check the V-belt for wear and damage by
means of a visual inspection and replace if
necessary.
Check V-belt tension and adjust as
required.
Insufficient tensioning increases V-
belt wear, excessive tensioning
may lead to bearing damage.
If you do not have the necessary
knowledge to adjust the V-belt, you
should have a technician perform
this work.
Checking V-belt tension:
● Detach the spark plug socket.
● Loosen screws (1), but do not unscrew
fully (remain on belt guard) and remove
belt guard (2).
● Using your thumb, press on the V-belt
between the two V-belt pulleys.
It must be possible to depress the V-
belt by approx. 10 mm.
Adjusting V-belt tension:
● Loosen the engine mounting (not
illustrated):
Loosen 3 bolts of engine mounting, but
do not remove; counterhold nuts on
upper side.
● Tension the V-belt by turning the
adjustment nut (3).
● After adjustment, re-tighten the engine
fastening bolts and install the belt
guard.
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