Gaspardo M 250, Use And Maintenance

Page: 32 / 94

USE AND MAINTENANCE
32
ENGLISH
cod. 19501112
g
3.10 REAR COVERING HARROW
The working pressure of the spring teeth of the seed-covering
harrow may be varied by rotating the spring on the upper parallel
arm (Fig. 21).
When the arm pins on the four holes are shifted, the clearance
angle of the spring teeth varies (Fig. 21).
3.11 ROW MARKER DISK ADJUSTMENT
The row marker is a machine that traces a reference line parallel
to the tracks of the tractor on the ground.
When the tractor finishes a row and makes a U-turn, the front
wheel will begin the new row through alignment with the line
traced in parallel (Fig. 22).
The row marker will continue to trace a parallel reference line
during its progress down each row.
The inversion of the row-marker arms is moved by means of a
control on the seeder. The operation will therefore be manual if
carried out by the tractor with the lever device (Fig. 26) or automatic,
with the movement of the (Fig. 27) hydraulic controlled lift, (Fig.
28). To bring the row marker arm into working position, proceed
as follows:
1) Unlatch the split pin (A) and remove the bolt (B) (Fig. 23).
2) Lower the row marker arm by rotating the left arm clockwise
and the right arm counter-clockwise about 60° and lock it in
position by placing the bolt (B) in the lower slot as shown in
Figure 24.
The row marker arm can also be equipped with a safety device
that protects it against hits from obstructions that could
damage it. To do this, remove screw M12 (F) and replace it with
an M5 screw (E) as shown in Figure 23. With the M5 screw in
place, if an obstacle is encountered, the screw is sheared so
the arm can rotate backwards without being damaged.
Adjust the length of the cables so that during work they stay
taut (G Fig. 24). Lock the row marker disk arms in a vertical
position during transport by using the pegs (Fig. 23 A, B).
3.11.1 ROW MARKER ARM ADJUSTMENT
See Fig. 22 and observe the following rules for correct row market
arm adjustment:
L = D (N +1) - C
2
where:
L= the distance between the outermost element and the row
marker;
D= the distance between the rows;
N= the number of elements working;
C= the tractor’s front track width
Example:
D= 13 cm (inch. 5); N= 23 elements; C= 150 cm (inch.59);
fig. 22
fig. 25
Avanzamento
Advancement
Avancement
A
B
fig. 21
AD
AC
BD
BC
A B
C D
1
B
A
F
E
fig. 23
fig. 24
D
C
B
A
(2) (1)
G