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Working description
The oil flow necessary to drive the blower, is taken from the tractor
distributor, through a pressure tube to a three-way regulator. The
rotational speed of the oleo-dynamic motor, and therefore that of
the blower, is proportional to the flow pressure shown on the
manometer (Table 3).
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
request), 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 filter;
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 tractor.
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 flow rate pump (closed hydraulic circuit),
equipped with oil flow rate regulator, open the three-way regulator
completely (B, Fig. 33) and, starting with a low oil flow rate,
gradually open the internal regulator of the tractor circuit until the
required pressure is reached as shown by the pressure gauge
(C, Fig. 33).
Blower pump control:
Seed drills are delivered with pressure based on the machine
width, as according to Table 4.
Table 3
cod. G19503100
USE AND MAINTENANCE
Table 4
mt. 2,5
mt. 3,0
mt. 4,0
mt. 5,0
mt. 6,0 - 9,0
g
B
A
fig. 34
If you wish to increase the number of revolutions of the fan for
distributing heavier seeds, carefully proceed as follows (Fig. 34):
a) loosen the handwheel (A, Fig. 34);
b) rotate the handwheel (B, Fig. 34) clockwise or anticlockwise
to reduce or increase pressure and adjust the number of
revolutions of the blower accordingly.
c) When the adjustment has been completed, tighten the lock
nut again.
It is strictly forbidden to touch act on the dowel (C, Fig. 34) for
any reason, as this would unset the system and could lead to
the motor or pump breaking.
Remember furthermore that at the successive start-up of the
system, 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 capacity
of the tractor's oil tank and whether the cooling system is sufficient.
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 approximately 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
C
WARNING
57
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