26
The cause of excessive vibrations can be the unbalance of the cutting assembly. Find out the exact cause of this problem
and contact an authorised technician for the repair.
25
MAINTENANCE
Before any check, maintenance or cleaning activity that has to be carried out at the end of every process, turn the engine off and wear
safety gloves.
25.1
CLEANING OF THE BIO
-
SHREDDER
CUTTING TOOLS ARE DANGEROUS !!!
Unscrew the knob (P) entirely and remove it from the hopper. Pic. 3A
Loosen of a few millimeters the 6 flange nuts (D) Pic. 3B
Turn the hopper as shown in the figure and remove it from the body of the machine Pic. 3C
Should there be jammed material and if it is impossible to remove it by following these simple operations, you have to extract the
rotor.
Block the rotor by inserting a screwdriver in the specific holes (F) on the rotor and on the body of the machine (Pic 4A). Remove the
screw (V) and the plate (P) and clean well the hexagon hole to allow a better fixing of the Allen wrench.
Screw a M12 fully-threaded screw with a neck of at least 70 mm. By screwing little by little, the rotor will be removed from the body of
the machine. Pic. 4B
After cleaning the bio-shredder, reassemble the components by carrying out these procedures in the reverse order.
25.2
C
HECKING AND REPLACING OR SHARPENING OF THE BLADES
Blades must always be checked before using them. To guarantee the good working of the machine, to achieve the best working
conditions and to avoid any damage of the machine, blades must always be intact and sharp (Pic. 5A). The duration of the cutting wire
depends on the nature and type of the shredded material and it is therefore impossible to give a precise datum. If the machine is used
to shred material containing dust, sand, or earth, the cutting wire of the blades will deteriorate very quickly.
ATTENTION: USING THE MACHINE WITH BLADES IN BAD CONDITIONS CAN CAUSE MECHANIC DAMAGES IMPUTABLE TO
THE USER.
To check the conditions of the blades, you need to have access to the rotor as indicated in the paragraph “Maintenance-Cleaning of
the bio-shredder”, when the blades are like in (Pic. 5B), they need to be sharpened.
To disassemble the blades, it is necessary to insert an Allen screw in the screws (V) making sure to clean well inside the hexagon
hole. Remove the blade and start sharpening (on the short side with a 40° inclination). Reassemble the blade (L) making sure the
supporting surface is perfectly clean and tighten the screws with a tightening torque of 37 Nm (Pic. 6). Should the screws be worn,
replace them by using screws with a resistance category of 10.9 or higher. We advise to substitute the screws each time you
substitute the blade.
Use original spare parts only (branded with the name of the manufacturer) and easily available from NEGRI authorised resellers.
Should the blade be subject to strong blows or hits, let a technician examine it.
25.3
C
HECKING OR REPLACING THE TRANSMISSION BELT
Check the belt transmission periodically every 10 hours of work. To reach the transmission you must remove the protective guide.
Loosen the 4 nuts fixing the engine and move the engine to increase the distance between the pulleys and then stretch the belt. Fix
the engine in its new position.
To replace the old belt, loosen the the nuts fixing the engine, remove the engine reducing the distance between the pulleys and
remove the old belt and replace it. Stretch it as described above.
Use original spare parts only (branded with the name of the manufacturer) and easily available from NEGRI authorised resellers.
If you require spare parts or simply technical information from our After Sales Service, it is necessary to provide the MODEL, the
SERIAL NUMBER and the YEAR OF CONSTRUCTION of the machine to make its identification easier and thus provide a quick and
precise service.
The above mentioned information can be found on the identification plate (see sticker AD0028 in the first pages of this handbook).
26
STORAGE
At the end of every use, turn the engine off, and clean the cutting assembly. Follow the instructions of the engine manual before
storing it. Store the machine in a dry and covered place.
If the machine is stored in a place where temperature is low and is not used for awhile, it is highly recommended to loosen the
transmission belt.
27
GUARANTEE
NEGRI SRL guarantees the machine against manufacturing and material defects for a period of 2 years from the purchase date, to
any person that does not use the machine for their business or profession.
Guarantee conditions meet the European Directive 1999/44/CE.
