Rear Spring Harrow; Adjusting The Seeding Depth; Important - GASPARDO PA1 Empleo Y Mantenimiento

4.7 REAR SPRING HARROW

The normal working position of the harrow is shown in Figure 420.
In this position, the wear on the teeth, between the long and the
short one is even and uniform. By adjusting the regulating handle
(A), it is possible to change the angle of the harrow.
The working pressure of the spring-loaded teeth can be varied by
rotating the spring (B) located on the upper parallel arm (Fig. 420).

4.8 ADJUSTING THE SEEDING DEPTH

To obtain a good level at which sprouts come out, the seed needs
to be placed at the right depth into the seeding bed.
Hoe coulter, disc coulter COREX
The seeding depth is adjusted simultaneously for all planting de-
vices through a crank (Fig. 421). By rotating it counterclockwise,
a stronger pressure can be exerted on the planting devices to the
ground by means of the extension springs, thus allowing deeper
seeding.
You can further adjust the pressure, separately, changing the
position of the tie-rod (B, Fig. 421).
With suffolk coulters only a spring (det. C, Fig. 421) is supplied, as
an accessory, to reset the weight of each individual spring element
(D) when the spring is fully unloaded. Shallow seeding is possible
in this condition.
Disc coulter COREX
With disc coulters is possible to assemble a rear rubber wheel
(Fig. 422), which allows to check the seeding depht. Thanks to
a series of holes, you can set the same seeding depht for all the
coulter elements (Fig. 422).
A) minimum depht: 0 ÷ 0,5 cm
B) maximum depht: 8 cm
IMPORTANT: we advise against the use of the rear wheel on
moist soils.
On request, the planting unit can be equipped with hydraulic regula-
tion of the pressure of the furrow openers (Fig. 421). This device is
tted in place of the manual adjuster screws and connected through
the special hydraulic tubes to the tractor distributor (double effect).
The device is operated by moving the lever of the tractor distributor.
During machine operation, the furrower pressure can be increased
in areas where the soil is more resistant to seed penetration.
The blocks (det. A-B, Fig. 423) are used to identify the maximum
and minimum planting pressure respectively that can be applied
on the furrowers and act as end-of-travel pieces for the hydraulic
cylinder.
g. 423
A
B
cod. G19504090
USE AND MAINTENANCE
g. 420
g. 421
D
g. 422
B
_
+
C
B
ENGLISH
A
A
_
+
A
B
EN - 71