NAX 3001S Mode D'emploi Original page 45

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 (510 mm), shorter knives are allowed, but then you have to take into account that the effective cutting width will be smaller,
B - width (56 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.
SPARK PLUG OPERATION
Spark plug 17 (Rys.(Fig.) 19A) must be replaced at the beginning of each season or after 100 hours of operation.
Use original B&S QC12YC spark plugs. Recommended gap between electrodes is: 0.51 mm (Rys.(Fig.) 19B). Check the gap with a
blade feeler gauge.
OIL REPLACEMENT
The first oil change should be carried out after 4 to 5 hours of engine operation. Perform next oil changes every 25 hours of operation
or more often. The oil drain plug may be mounted on the engine block, but this depends on the engine model. If the engine does not have
a drain plug in the engine block, pour oil with the filler plug after emptying the fuel tank:
 Unscrew the oil filler cap with the dipstick.
 Remove the air filter to prevent it from absorbing gasoline when the mower is tilted.
 Tilt the mower to the oil filler plug side 15 (Rys.(Fig.) 20).
 Leave the mower in this position until the oil stops flowing (this may take several minutes).
After pouring the oil out of the engine, set the mower in a flat position and pour about 0.6L of engine oil recommended by B&S SAE30
specification by checking the level on the dipstick integrated with the oil filler cap. Screw in the oil plug with the dipstick and install the air
filter.
AIR FILTER REPLACEMENT
Every 25 hours of operation, check the condition of the air filter. The filter must be replaced every 100 hours or earlier if it is contaminated.
Loosen the fastener A that holds the cover B (Rys.(Fig.) 21).
1. Open the cover B (Rys.(Fig.) 21).
2. Remove the pre-filter C and air filter D ((Rys.(Fig.) 21)
3. If the filter is not damaged:
- gently tap the filter D (Rys.(Fig.) 21) on a hard surface to remove impurities,
- wash the filter sponge element C with water and detergent,
- squeeze the foam element into a clean Loth.
- do not oil the pre-filter.
4. If the filter is damaged or damaged, replace the filter with a new one.
5. Replace the cover by sliding the catches into the slots on the filter housing or tighten the screw. Reinstall all air cleaner
components, replace the air cleaner cover and secure with the fastener.
LINE ADJUSTMENT
The cables may stretch and contract during use. They should then be checked and properly adjusted (if adjustment is available on your
model). To do this loosen the small locking nut 1 (Rys.(Fig.) 22) and then depending on your needs:
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