Reversing The Blades; Sharpening The Blades - Viking GB 460 C Instruction Manual

● Remove the feed chute ATO 400 and
the blade cover. ( 12.2), (
● Insert the counter-blade (1) into the
mounting (2) in the housing.
● Screw in the screw (3) and tighten to
28 - 32 Nm.
● Install the feed chute ATO 400. (

12.7 Reversing the blades

Risk of injury:
Always wear thick
gloves.
When the blades are blunt, we
recommend that you reverse all the
blades on the particular blade disc.
All blades (regardless of the blade
geometry) are reversed in the same
way.
● Removing the blade discs. (
Risk of injury:
To prevent injuries, always clamp
down the blade discs before
installing or removing the blades.
Reversing the four blades of the soft
material blade disc (Figure A):
1. Removing:
● Unscrew screws (1) and remove
together with nuts (2).
● Remove blade (3) upwards.
2. To install:
● Clean the blade disc.
● Reverse blade (3) and place onto the
blade disc with the sharp edge exposed
and align the bores.
64
● Insert screws (1) through the bores and
7.3) screw on nuts (2). Tighten nuts (2) to
8 - -10 Nm.
Reversing the three blades of the hard
material blade disc (Figure B):
1. Removing:
7.5) ● Unscrew the screws (4) and M8
screws (5) and remove them together
with the nuts (6) and M8 nuts (7).
● Lift off the blades (8) and blade (9).
28
2. To install:
There must be no gap between the
two blades (8) following installation.
A gap between the two blades
impairs the feeding function.
● Clean the blade disc.
● Reverse the blades (8) and place onto
the blade disc with the sharp edge
exposed and align the bores.
● Insert screws (4) through the bores and
12.3)
screw on nuts (6). Do not tighten.
● Press the two blades (8) together (see
small illustration) and hold. There must
be no gap between the two blades (8).
● Tighten nuts (6) to 8 - -10 Nm.
● Reverse the blade (9) and place onto
the blade disc with the sharp edge
exposed.
● Insert the M8 screws (5) through the
bores, screw on the M8 nuts (7) and
tighten to 16 - 20 Nm.

12.8 Sharpening the blades

We recommend that all blades are
sharpened only by a specialist
dealer, as the function (drawing in
of shredding material, durability of
the cutting edges etc.) of the
garden shredder may deteriorate if
blades are ground incorrectly
(wrong sharpening angle,
imbalanced due to unevenly ground
blades etc.).
Always wear safety glasses when
sharpening. Make sure that others
are kept out of the danger area.
● Removing the blade discs. (
● Remove the blade. ( 12.7)
Sharpening angle:
The sharpening angle for all the blades is
30°.
Instructions for sharpening the blades:
The following points must be observed
when re-sharpening the blades:
● 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.
● Re-sharpen the cutting edges to the
specified sharpening angle.
● Sharpen the blades against the cutting
edge.
0478 216 9905 D - EN
12.3)