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42 EN
3.
Rest the side discharge cover on the side discharge duct
(Rys.(Fig.) 16D)
.
MAINTENANCE
HANDLING THE CUTTING KNIFE
Warning:
Disconnect the spark plug wire before checking the cutting knife or blade attachment shaft. If the knife hits an object, stop
the engine, disconnect the spark plug cable and check the mower for damage. Check whether the crankshaft on the power take-off side or
the adapter to which the knife is attached has not been damaged (bent or cracked).
The knife adapter does not provide protection against engine damage when the knife hits objects other than grass, e.g. stones, branches,
molehills.
Check often that the knives are not bent, that they are not excessively worn, and that there are no other damages such as cracks
or deformations.
Damaged parts must be replaced with new ones, recommended by the manufacturer. For safety, replace the knives every two years.
Knives should be well sharpened (details in chapter "Sharpening a knife"). Blunt knives tug at the grass, causing the tips to yellow.
Attention! It is imperative to balance the knife after each sharpening. An unbalanced blade can cause dangerous vibrations
that can damage the mower and / or cause an accident.
Check the knife clamping screw often. The screw must be firmly tightened to a torque of 45 to 55 Nm.
REMOVING THE KNIFE (Rys.(Fig.) 17)
1.
Adapter
2.
Knife
3.
Saddle half pad
4.
Screw
Attention! Cutting knife 2 (Rys.(Fig.) 17) it can be very sharp, use gloves to protect your against injury. Screw
4 (Rys.(Fig.) 17) unscrew to the left (right-hand thread).
1.
Empty the fuel tank.
2.
Use a wooden block to prevent the knife from turning.
3.
Loosen the screw that holds the knife.
4.
Check the condition of the knife (see chapter "Operation of the cutting knife").
5.
Replace a worn or damaged knife with a new one recommended by the manufacturer.
6.
Tighten the screw to 45 to 55 Nm. If the clamping screw is too loose, the knife may become loose, which may cause an accident.
Attention! When installing the knife, remember about the direction of the knife. If the knife is incorrectly fastened,
it will not cut properly and may cause an accident.
THE MOST IMPORTANT KNIFE PARAMETERS (Rys.(Fig.) 18)
A
-
length (460 mm), shorter knives are allowed, but then you have to take into account that the effective cutting width will be smaller,
B
- width (50 mm),
C
-
clamping hole diameter (11 mm),
D
-
hole center distance (27 mm),
Hole diameter 11x11 mm circle for safety wedges is standard and amounts to 15.5 mm. It is recommended to use NAX cutting knives
dedicated to the given mower model.
Attention! The shape of the knife indicates its characteristics, depending on the shape of the knife is more suitable for:
mowing with a basket, mowing with side ejection or mulching. The universal knife used in the factory may turn out to be less
efficient than we would have expected, so it is recommended to buy accessory knives for each function, i.e. one for grinding, the other
for throwing grass into the basket.
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