ENGLISH Use e Maintenance
Once the fertiliser spreader has been prepared for the
flow test, get on the tractor and proceed with the test as
instructed in the control system instructions manual.
DANGER!
In order to run a flow test with results that are
true to reality, you must turn on the tractor and
bring the P.T.O. to 540 rpm.
Before activating the P.T.O., make sure that no
one is near the tractor.
DANGER OF DRAGGING BY ROTATING PARTS.
NEVER get out of the cab until the test has been
completed.
In case of danger, stop the P.T.O. immediately
and turn off the tractor.
Once the flow test has been completed,
disconnect the P.T.O. and turn off the tractor
before getting off.
Once the flow test has been completed, reassemble the
spreading discs as shown in § 4.7.3 on pag. 30.
Determining the flow (kg/min)
For a certain opening of the fertiliser outlet shutters, de-
fined as:
• Q
T R
: the total quantity in (kg) of fertiliser collected
during the flow test
• t
T
: the time in sec of flow test duration
it is possible to determine the total outgoing flow value
1
via the following equation:
• If the flow test is run on both the outlet shutters
F
T
=
Q
T R
t
T
· 60 [kg/min] (4.5)
• If the flow test is run on only one of the outlet
shutters
F
T
=
2 · Q
T R
t
T
· 60 [kg/min] (4.6)
4.7.9 Spread check test
The adjustments shown in the spreading tables are the re-
sults of testing done in specialised laboratories. We need
to consider that the fertiliser itself can have differing physi-
cal features due to varying environmental conditions (heat,
humidity, dryness, storage conditions, etc.) as well as
varying production batches. As such, before spreading on
the field, running a spread check test may be useful. This
1
Total flow is intended as the sum of the outgoing flows from
both outlet shutters
type of test becomes even more important when spreading
a fertiliser that is not shown in the spreading tables.
To run the spread test, proceed as follows.
1. Position collection crates as shown in fig. 4.25. W is
the working width.
2. Run three fertilising cycles.
3. For every row of crates, pour the collected fertiliser
in the measuring tubes and compare the obtained re-
sults with what is shown in fig. 4.26.
• Result (1): Excessive concentration of fer-
tiliser at spreading centre.
The drop point needs to be adjusted to higher
values. For example, from 20 to 25. After cor-
recting, repeat the spread test if needed.
• Result (2): Excessive concentration of fer-
tiliser on the spreading sides.
The drop point needs to be adjusted to lower
values. For example, from 40 to 32. After cor-
recting, repeat the spread test if needed.
• Result (3): Assymetrical spreading.
– Make sure the crates for the spread test
were placed parallel to the passage ways
and correct their placement if needed.
– Check for excessive wind and, in the event,
postpone spreading operations.
– Make sure the machine is adjusted sym-
metrically.
– Check machine symmetry and, in the
event, correct it as shown in § 5.5 on page
40 and § 5.6 on page 41.
• Result (4): Spreading is homogeneous.
The adjustment is correct.
34- EN Cod. F07011577
To Next Page
Loading...
