15
DOSAGE
Close the trap-door (fig. 21/5).
Open the hopper’s folding cover (fig. 21) and fill the hopper
with seeds.
Open the lower trap-door (fig. 21/7).
Fig. 21
7
5
Fig. 21 A
7
X
2
Fig. 21 B
Turn
the handle for unblock him
(X, Fig. 21 A)
and move it to po-
sition
“
NO
”
(Test position).
Place a sack or a container under the exit of the venturi injec-
tor sluice which has previously been opened.
Place the crank in the right wheel of the seed drill and turn it
clockwise as many times as indicated below.
TYPE MACHINE
ROUE 340/55-16
SM 400/25
26,5 tours
SM 450/29
23,5 tours
SM 500/31
21 tours
SM 600/37
17,6 tours
WHEN
YOU END THE TEST, CLOSE THE COVER OF
VENTURI INJECTOR, MOVE HANDLE IN POSITION
“
OK
” AND LOCK IT.
6.4 COMPLEMENTARY DOSING TESTS
1- Test to determine the number of wheel turns.
If differences exist between the test and the actual dose dis-
tribution (due to a very uneven or light soil, low pressurised
tyres, etc.), an experimental test can be performed.
First of all, the distance (in metres) as shown in the table
below should be marked on the field’s ground using a tape
measure:
WORKING WIDTH
METRES TO COVER
SM 400
62,5
SM 450
55,6
SM 500
50,0
SM 600
41,7
Next, the seed drill in working position should cover that dis-
tance.
By means of a mark made previously on the tyre, count the
number of turns performed in the covered distance. A good
place whereby which to count could be the wheel’s mud
scraper.
By following these steps we can obtain the actual number of
turns performed in the seed dosing test. By performing the
test, we will know the actual kilograms per hectare distribu-
ted by the machine.
Fig. 22
2- Seed dosing adjustments.
When using high quality certified seeds it is not enough to
know the weight in kilograms distributed by the machine, as
the final result of the harvest will depend on the number of
plants which eventually ripen.
Summary of Contents for SM-1909/L
Page 36: ...34 DOSAGE TABLE...
Page 47: ...45 SPARE PARTS...
