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breviglieri m21-2 165 Instrucciones De Empleo Y Mantenimiento página 24

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Never modify or adapt the driveline in any way. If this is nec-
essary, contact your nearest Authorized Assistance Center.
Since the driveline spins at high speed, it is balanced during the
testing phase. Any successive interventions could therefore lead
to lack of balance which could then impair the functionality of the
machine besides that of the actual driveline itself.
The angle at which the driveline works must be the minimum pos-
sible as this will ensure that both the driveline and machine are
long-lasting.
When the driveline is fully extended, in all work conditions, the
telescopic tubes must overlap to at least 1/3rd of their length (A
Fig. 5).
When the driveline is fully inserted, the play must be at least 4 cm
(B Fig. 5).
Contact the Manufacturer's Technical Service if this is not pos-
sible.
Before engaging the PTO, make sure that its rotation speed
corresponds to the rate for which the machine has been de-
signed (540 or 1000 rpm).
Do not allow the machine to operate unless it digs into the
soil. When working, do not drive around bends with the ma-
chine in the soil. Do not work in reverse. Always raise the
implement before you change direction or reverse.
During transport or whenever the machine must be lifted, re-
member to adjust the power lift of the tractor so that the steer-
age hoe is not raised more than about 40 cm from the ground.
Do not drive on the public roads with the machine caked with
soil, grass or other materials that could dirty the road sur-
face or hamper the traffic in any way.
Do not allow the machine to drop violently on to the ground.
Lower it slowly to allow the tines to gradually penetrate into
the soil otherwise all the machine components would be sub-
jected to stress that could lead to breakages.
4.4 WORK DEPTH
The machine's work depth is established by operating the crank
that controls the vertical movement of the two wheels (A Fig. 7).
The crank must then be retained with the relative fork.
Max work depth 10 cm in loose soil.
4.4.1 ADHERENCE ADJUSTMENT WHEN TILLING
To adjust the tilling unit's adherence to the ground, regulate the
compression of the spring by means of the relative ring nut: turn
the nut towards the left to reduce the adherence or towards the
right to increase it (Fig. 8).
Along with the adherence adjustment, you can also increase or
reduce the extent to which the tilling unit slants in relation to the
ground by means of the relative crank above the spring.
Turn towards the right to raise the rear part or towards the left to
lower it.
DANGER
CAUTION
CAUTION
m21-2
4.5 IN WORK
Begin work with the PTO at full rate. Gradually dig the implement
into the ground. Do not depress the accelerator pedal too much
with the PTO engaged.
To break up the soil to the required degree, you must consider
several factors, i.e.:
- the nature of the soil (medium consistency, sandy, clayey, etc.)
- the work depth
- the ground speed of the tractor
- optimum machine adjustment.
The soil is crumbled to a fine degree with a low tractor ground
speed and with the tilling unit close to the ground.
The speed of the tractor when the machine is operation must
not exceed 3-4 kph or components could be broken or dam-
aged.
The turning tines could throw up stones or other sharp ma-
terials as they work.
Constantly check to make sure that there are no bystanders,
children or domestic animals within the range of action of
the machine.
4.5.1 HOW TO WORK
Engage the power take-off and move forwards with the tractor
while progressively lowering the machine.
Drive a short way then check to make sure that the work depth,
the extent to which the soil is broken up and the soil levelling
process are correct.
For increased adherence to the ground, adjust the compression
of the spring by means of the relative ring nut.
4.5.2 USEFUL TIPS
Depth too shallow
- Check the way the tilling units are regulated.
- Advance more slowly. The tractor power could be insufficient.
- Further runs are needed if the soil is too hard.
- The tines roll over the soil instead of penetrating it: advance
more slowly.
Soil broken up too much
- Increase the ground speed.
Soil not broken up enough
- Reduce the ground speed.
- Do not work in soil that is too wet.
Rotor clogged
- Soil too wet to work.
- Lift the tilling unit.
- Reduce the ground speed.
- Do not work where the grass is too tall. If necessary, remove
any material that has built up at the sides of the rotor to prevent
overheating.
The machine jolts over the ground or vibrates
- Foreign bodies blocked between the tines.
- Tines incorrectly mounted without the helical positioning or that
penetrate into the soil with the blunt edge first.
- Worn or broken tines.
- The rotors have become warped due to striking obstructions
during work.
- 24 -
CAUTION
DANGER

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