Great Plains YP4425A Operator Manual - Manual (Page 50)

46 YP4425A Table of Contents Index Great Plains Manufacturing, Inc.
401-805M Table of Contents Index 2012-02-23
Air-Pro
®
Meter Operation
Refer to Figure 51
The meter disc is driven, top forward, by a chain drive
(not shown) always connected to the section drive shaft.
Seed is air-delivered to the inlet above the air release
screen
. Seed customarily fills to the top of the screen,
blocking further air flow from the seed delivery system,
until the seed level falls below the screen.
Seed enters the meter at the seed inlet shutter (if
open), and forms a seed pool at the base of the meter.
Seed pool size is controlled by the shutter handle
setting (which is the only user adjustment at the meter).
Initial shutter settings are given in the seed rate charts.
Meter pressurization air enters the meter at , and exits
the meter primarily at the seed pockets in the seed disc.
The pressure differential holds seed in the disc
pockets
rising from the seed pool. Excess seed at a
pocket is picked off by the tickler brushes .
The strip and drop brushes block meter pressurization
air. Seeds passing the drop brush
are free to fall into
the seed tube, and are detected by the seed sensor .
Meter Operation
1. Install discs for your crop/population range per the
Seed Rate manual and the instructions beginning on
page 77 of this manual.
2. Open the shutter at planting rows to the
recommended initial setting (from the Seed Rate
charts).
3. Operate the fan at normal field rpm (page 42).
4. On the seed monitor, perform a “FILL METER”
operation.
5. With all rows primed, rotate meters one turn to fill
pockets to edge of drop brush.
For hydraulic drive, engage all clutches, and use a
“FILL DISC” seed monitor operation.
For ground drive, either disengage all clutches and
rotate the section drive shafts (top forward) with a
7 ⁄
8
inch (23 mm) wrench, or raise planter, engage
clutches and rotate ground drive tires (top forward).
6. Leave fan running (to keep seed in top pockets).
Re-install rain covers. Commence planting.
Meter operation is automatic from this point on.
For hydraulic drive planters, an optional Remote Test
Switch is available from DICKEY-john
®
which allows
at-row control of meter rotation for meter fill and seed
pool recovery operations.
See also:
“Seed Pool Troubleshooting” on page 83,
“Seed Pool Recovery” on page 84,
“Meter Clean-Out” on page 95, and
“Meter Brush Maintenance” on page 97.
Figure 51
Air-Pro
®
Seed Meter at Row
29825
3
2
1
5
6
4
7
8
9
1
2
3
4
5
6
7
8
9