Great Plains NTA2007 Operator Manual - Manual (Page 65)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 61
2012-01-05 Table of Contents Index 166-372M
Fan General Information
The hydraulic fan supplies the air stream that carries
materials from the meters, through the primary hoses to
the towers, then to the secondary hoses to the rows.
The fan needs to be running in the correct direction, and
within a narrow speed range, to reliably deliver material
at your calibrated rates.
Machine Damage Risk:
Always engage the fan with the tractor at a low engine speed.
Engaging the fan when the tractor is at high speed may cause
fan damage.
Do not reverse hydraulic flow with the fan running.
Fan Field Operation
1.
Unfold the implement (page 35).
2. Set the Fan circuit lever to neutral.
3. With the tractor engine at low rpm, slowly Extend the
lever for the Fan/Fold circuit. Bring the fan up to
recommended speed (page 87). Let the fan warm up
for 15 minutes before planting.
4. Lower the drill 1.5 - 3m (5 to 10ft) before planting is
to begin. It takes a few seconds for seed to travel
from the meters to the rows.
5. Leave the fan running during field turns. Meter drive
is shut off when the openers are raised.
6. At the end of application, raise openers. Stop
material flow before shutting off the fan.
7. Shut off the fan by carefully moving the Fan circuit
lever to Float or Neutral. Avoid moving the lever into
Retract. The fan does not stop instantly. A check
valve in the fan circuit locally re-circulates oil until the
blades coast to a stop.
Note: If the fan plumbing or hitch hook-up is reversed, air
flow rate will be very low or zero. If you are unable
to reach 3000 rpm, check remote circuit mode and
hose connections.
Note: Fan speed is monitored and reported by the seed
monitor, but is manually controlled. The optimum
rate depends on the seed type and any
treatments. “Fan Speed Suggestions” on
page 87 for further information.
Note: On dual-hopper drills, operating pressure at the
meters is also affected by the diverter vane
adjustment (page 89).
Figure 53
(Dual) Manifold Pressure Gauges
31189