horsch Pronto 3 - 6 DC Operating Instructions Manual page 63

Fan setting, seed transport and seed place-
¾
ment must be checked on all coulters when
starting sowing and also at regular intervals
when working on large areas.
The fan impeller and protective grid must
¾
be regularly checked for dirt deposits and
cleaned.
Deposits on the protective grid restrict the air
flow and thus lead to blockage in the seed
pipes.
Deposits on the fan impeller cause unbalance.
The bearing will thereby be overloaded and
can be damaged.
WARNING
Risk of injury from running fan.
Remove the protective grille only after the fan
¾
has stopped.
To control the speed, the control unit in the trac-
tor must be equipped with a flow control valve.
Rotary speeds
Gear motor
Axial piston motor
Speed
Fan motor direct drive
The fan speed is adjusted via the oil quantity on
the flow control valve in the tractor.
The hydraulic pump must deliver sufficient oil
to prevent the fan speed from dropping, even
when the tractor speed drops or other hydraulic
functions are activated.
NOTE
NOTE
max. 4,000 rpm
max. 5,000 rpm
max. 4,500 rpm.
Connecting the hydraulics
CAUTION
Damage on the fan motor - gear motor
Be sure to connect the return line to the pres-
¾
sureless return of the tractor!
Note the return flow pressure of max. 5 bar
¾
in the leak oil line!
Gear motor connection
CAUTION
Damage on the fan motor - axial piston motor
Connect the leak oil line to the leak oil port
¾
of the tractor!
Note the return flow pressure of max. 2 bar
¾
in the leak oil line!
Axial piston motor connection
59