GREAT PLAINS Yield-Pro 3P3025AH, Руководство оператора

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Great Plains | 411-332M | 2019-02-19 Table of Contents Index 44
3P3025AH Table of Contents Index Operating Instructions
Air and Seeding System Overview
Refer to Figure 44, on page 43, and Figure 45.
The hydraulic fan supplies air exclusively for meter
operation. Fan rpm is operator-adjusted via the tractor
circuit’s hydraulic flow control.
The manifold system delivers fan air across the
planter. It includes passive internal design features to
balance pressure across the planter.
Separate pressurization tubes route manifold air to
each row unit.
Seed is delivered from the seed box by gravity through
the seed tubes , to the inlet of the Air-Pro seed meter.
A manually adjusted inlet shutter controls the size of
the seed pool at the base of the meter. The shutter
also minimizes air loss back up the seed inlet tube, and
is also used during row shut off. See page 71 for shutter
adjustments.
At the meter, pressurization air exits the meter through
the seed pockets
of the disc, and holds seed in the
pockets until released above the seed tube .
In the seed tube, the seed sensor
detects passage of
seeds. Medium size and large seeds are counted
individually. With smaller seeds, most are detected,
allowing the planter monitor to detect stoppages.
Several rows have a pressure sensor port
for the
Meter pressurization system. A line from each of
these rows is connected to a chamber to average the
pressures.
The averaged pressure is reported by a Magnehelic
gauge
visible to the tractor operator. See page 53 for
use of the gauge in making fan adjustments.
A sensor
in each seed tube reports seed passage to
the planter monitor. Larger seeds are counted
individually. For smaller seeds, the system acts as a
blockage monitor.
 Use of the special blank disc (page 75), and closing
the seed inlet shutter (page 71), are particularly
important when a sensor row is shut off.

On any row, running a normal disc with no seed, or
with an open empty inlet, unbalances the air system.
Doing either at a sensor row causes the gauge to
mis-report as well.

Do not operate in the ground with the fan shut off, or
with insufficient manifold pressure. The meters will
completely fill with seed. Meter clean-out may be
required to resume normal operation.
Figure 45
Air-Pro Meter, disc Side
31040
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