14
We reserve the right to make technical changes.
5.6 Fan speeds
The corresponding blower speed should be
selected to provide an appropriate stream of
air for the operating width and seed type.
The current fan speed is displayed at the computer
terminal (14.1).
An oil capacity of approx. 30 litres/ min is required for
operation at max. fan speed.
A hydraulic valve (14.2/2) regulates fan speed. For
operation at min. fan speed, the hand wheel (14.2/1)
should be turned outwards until the desired turning
speed is reached.
-turn out = reduced volume (lower turning speed)
-turn in = increased volume (higher turning speed)
For operation at max. fan speed, the hand wheel
should be turned inwards until the desired turning
speed is reached.
The hand wheel should then be locked in place.
Hydraulic blower drive requires the following tractor-
mounted items:
- With open hydr. system, a separate oil circuit with a
min. feed rate of 35 l/min.
- Single-action control device or twin-action control
device with oil quantity adjustment and fl oat setting.
On load-sensing or closed hydr. system, a single- or
double-action control device with priority switching
and oil-fl ow adjustment. Before initial startup of the
blower, the fl ow rate should be adjusted at the tractor-
mounted control device to approx. 30 l/min. At redu-
ced blower speeds, the fl ow rate should be increased.
- Non-pressurized return with NW 22 tube and size-4
hydraulic system.
- Hydraulic-oil cooler to prevent damage to the
tractor’s hydraulic system: If the blower is operated
with a twin-action control device, it must be possible
to switch the control device directly from operating to
fl oat setting at switch-off.
Control device to “lower” = blower op.
Control device to “fl oat setting” = blower switched off.
IMPORTANT !!!
In order to prevent fl uctuations in fan speed when
towing with the load-sensing system, all further powe-
red items (coulter-pressure adjustment, lane markers,
etc.) should be adjusted at the corresponding control
device to run with the lowest possible quantity of
oil. For long-term operation of the blower, follow the
indications in the operating manual supplied with the
tractor, or consult with the tractor manufacturer.
Fan speeds
Operating
width
Fan speed
min
max
from 4m
2500
3500
Operating
position
Pressure range
Approximate values
from 4m
Coarse
seed
80 - 100 bar
Fine seed
30 - 50 bar
14.1
14.2
1
2
