How To Work; Useful Advice; Work Depth Adjustment - breviglieri teknofold 450 Manuel D'utilisation Et D'entretien

at which the harrow units open and close (E Fig. 6,7,8).
These valves are calibrated so that the movement of the cylin-
ders and, consequently, the way the harrow units lift and lower,
is as smooth and uniform as possible. This movement can be
regulated by tightening or loosening the ring nut that holds the
flow governor valve (E Fig. 6,7,8) until the two side harrow units
lift and lower in the required way. After this, lock the valve in
position with the ring nut in the governor valve.
WARNING
When the harrow units are vertical, make sure that you have
sufficient visibility at the rear from the driving position of
the tractor since the harrow units could obstruct your view.
In this case, you are advised to mount one or more rear
view mirrors on the tractor in order to ensure unobstructed
visibility.
DANGER
Whenever the two harrow units are set in the vertical position,
make sure that they are automatically locked in place with
the two relative locking clamps.

4.6.1 WORK DEPTH ADJUSTMENT

Depending on the way the implement is outfitted, the work
depth of the folding harrow can be adjusted:
▪
with hydraulically controlled cylinders.
▪
Raise the roller to dig deeper into the soil. Lower the
roller if the work depth must be more shallow.
Work depth adjustment with the hydraulically controlled
cylinders is carried out from the driving position by means of a
hydraulic actuator that controls the two hydraulic cylinders (2
Fig. 1). These cylinders regulate the rear rollers (1 Fig. 1) and
therefore determine the work depth.
Both hydraulic cylinders have a blocking valve that allows the
same roller adjustment and, thus, the same tilling depth to be
obtained.
4.7 IN WORK
Begin work with the PTO at full rate. Gradually dig the imple-
ment 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, clay-
ey, etc.)
▪
the work depth
▪
the ground speed of the tractor
▪
optimum machine adjustment
Soil crumbling is obtained at a low tractor ground speed, with
the rear bar lowered and the blades spinning at 300 rpm. Besides
holding back the clods already broken up by the blades, the rear
bar also obtains a well levelled and uniform surface after the soil
has been worked.

4.7.1 HOW TO WORK

Adjust the roller (8 Fig. 1) to suit the degree to which the soil
must be crumbled, engage the PTO and begin to move forward
with the tractor, progressively lowering the implement. Cover
a short distance, then check to make sure that the work depth,
soil crumbling and ground levelling operations have been carried
out in the required way.
The speed of the tractor when the machine is operation
must not exceed 3-4 mph or components could be broken
The blades may throw up stones or other sharp objects as
they spin. Constantly check to make sure that there are no
bystanders, children or domestic animals within the range
of action of the machine.

4.7.2 USEFUL ADVICE

Depth too shallow
▪
Check the depth adjustment
▪
Move forward more slowly. There may be insufficient
tractor power. Raise the rear roller
▪
Further runs will be required if the soil is too hard
▪
The blades slide over the ground instead of digging into
the soil: advance more slowly
Soil crumbled too finely
▪
Lower the speed of the blade rotors
▪
Increase the tractor ground speed
Soil insufficiently worked
▪
Increase the speed of the blade rotors
▪
Reduce the ground speed
▪
Do not work if the soil is too wet
▪
If the levelling bar is installed, try lifting or lowering it
Clogged rotors
▪
Soil to wet to work
▪
Raise the levelling bar
▪
Reduce the ground speed
▪
Do not work where the grass is too tall
The machine jolts over the ground or vibrates
▪
Foreign bodies locked between the blades
▪
Blades incorrectly mounted in the wrong positions
▪
Worn or broken blades
▪
Blades bent during work after hitting stones or having
worked excessively hard soil
The machine vibrates too much
▪
Reduce the ground speed of the tractor
▪
Adjust the machine in the correct way, as described in the
instructions
▪
Clean the rotors. They could be clogged
▪
Check whether any blades are broken. Replace them if
this is the case
- 29 -
teknofold 450
CAUTION
or damaged.
DANGER