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3.11 ASPIRATOR
The fan (Fig. 36) creates a vacuum inside the distributors, so that
the seeds are aspirated onto the holes in the plate. The fan group
gets the movement from the cardan shaft at 540 r.p.m.
Comply with the number of rpm recommended for the power
take-off.
Its function is to create the necessary vacuum in order to keep the
seeds attached to the holes on the seed table and then to blow
them keeping the holes clean, after the seed dropping out.
ATTENTION
All operations must be carried out by expert personnel,
equipped with protective gloves, in a clean and dust-free
environment.
Vacuum (1, Fig. 36)
Indicates vacuum of intake from 0 to -100 mbar. The average in-
dicative suction values for small seeds is -35 ÷ -40 mbar, for pilled
seeds -55 ÷ -60 mbar.
Adjust the element using the diaphragm (4, Fig. 36) installed at the
centre of the air conveyor; increase suction by closing the door.
Gauge (2, Fig. 36)
Indicates blowing pressure from 0 to 25 mbar. The average indi-
cative suction values for small seeds is 8 ÷10 mbar.
Reach the above data raising the PTO shaft rpm and operating
on plate (3), opening the plates to diminish and shutting them yo
increase, in both of cases, vacuum and/or blowing pressure.
IMPORTANT
In order to allow a good fan cooling, do never work with the plate
(3) completely shut. If you do not reach the above operating data
increase revolutions of the PTO shaft.
The tensioning and good condition of the belt are therefore of
vital importance to ensure the good for the good operation of the
aspirator and, hence, the success of the sowing.
Make sure that the universal joint is disconnected from the
power take-off before carrying out the following operations:
Belt checking procedure:
- Remove the protective housing
- Loosen the screws (1, Fig. 37);
- Loosen the nut (2, Fig. 37);
- If worn, replace the belt;
- Tension the belt by tightening the screws (3, Fig. 37);
- Tighten the bolts loosened before and close the casing.
3.12 SEED ASPIRATOR DEVICE
The machine is equipped with a seed aspirator (Fig. 38), which
recovers the unutilized amount of seeds left in the seed tank, when
seeding is over.
USE:
Open the valve (2, Fig. 38) downline of the recovery box (1) and
fi t the pipe end in the seed tanks. Stop the tractor and engage the
parking brake before starting the PTO for seed aspiration.
66 - EN
WARNING
USE AND MAINTENANCE
3
4
fi g. 36
fi g. 37
2
1
fi g. 38
1
2
3
2
1
5
17
NR -
19
NR -
1
cod. G19502812
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