Gaspardo ALITALIA Gebrauch Und Wartung Seite 69

Working description
The rotational speed of the oleo-dynamic motor, and therefore that
of the blower, is proportional to the fl ow pressure shown on the
manometer (Table 4). The system is equipped with a safety valve
that allows the blower to continue turning by inertia even after the
system has been disengaged or when there has been a sudden
failure of the system.
The return circuit, which can have a radiator incorporated (on re-
quest), must be low pressure (max 10 bar) otherwise the oil-seal
of the oleo-dynamic motor will be damaged. We recommend that
a 3/4 inch return pipe is connected to the tractor's oleo-dynamic
system scavenge union in the following way:
a) The return oil must pass through the fi lter;
b) The return oil must not pass through the distributors but
through a low-pressure return circuit (scavenge).
For further information contact the manufacturer of the trac-
tor.
Starting up
With the engine off and the tractor immobilized, connect correctly all
the quick-couplings. Start the engine and operate the system at idle
for a few minutes bringing constant pressure to the entire circuit in
order to avoid instability of the blower. It is possible to regulate the
pressure only when the oil has reached the right temperature and
the blower does not present changes of speed. If the equipment
is used with more than one tractor and, consequently, different
distributors and oils, it will be necessary to repeat the calibration
procedure for each tractor.
In tractors with a variable fl ow rate pump (closed hydraulic circuit),
equipped with oil fl ow rate regulator, starting with a low oil fl ow
rate, gradually open the internal regulator of the tractor circuit
until the required pressure is reached as shown by the pressure
gauge (Fig. 53).
fi g. 53
cod. G19503391
USE AND MAINTENANCE
C

Blower pump control:
The air capacity can and must be changed according to the specifi c
weight of the seeds:
Seed type
Normal seeds
Fine seeds
(colza, lucerne, ecc.)
Make sure that the hydraulic pipes are connected according to the
diagram and minimise the distributor oil fl ow of the tractor, which
corresponds to the hydraulic motor delivery.
Activate the distributor with continuous delivery oil.
Increase the distributor fl ow until you reach the number of revs
indicated in table 4.
The number of revs of the drive fan appears on the supplied mo-
nitor screen.
It is strictly forbidden to touch act on the dowel (C, Fig. 53) for
any reason, as this would unset the system and could lead to
the motor, the pump or the fan.
Remember furthermore that at the successive start-up of the sy-
stem, with cold oil and the position of the regulator untouched, there
will be an initial increase in the blower speed which, once the right
working temperature has been reached, will return to that set.
Oil cooling
When using a dependent system it is important to check the ca-
pacity of the tractor's oil tank and whether the cooling system is
suffi cient. If necessary have an oil cooler or a larger tank installed
on the tractor by the dealer: the ratio between the volume of oil
in the system and the capacity of the tank should be appro-
ximately 1:2.
ATTENTION
- Always keep oils and grease out of reach of children.
- Always read warnings and precautions indicated on the
containers carefully.
- Avoid skin-contact.
- After use wash the equipment thoroughly.
- Treat the used oils and polluting liquids in conformity with
the laws in force.
The Manufacturer declines all responsibility due to negligence
and non-observance of these rules.
ENGLISH
Nr. of revolutions Pressure
(r.p.m.)
4000 95 ÷ 100
3000 60 ÷ 65
WARNING
EN - 69
(bar)
Table 4