Great Plains YP825A Operator Manual - Manual (Page 46)

42 YP425A, YP625A and YP825A Table of Contents Index Great Plains Manufacturing, Inc.
401-651M Table of Contents Index 2014-08-15
Air-Pro
®
Meter Operation
Refer to Figure 41
The meter disk is driven, top forward, by a chain drive
(not shown) always connected to the section drive shaft.
At non-planting rows, use a blank disk (page 78).
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 disk.
The pressure differential holds seed in the disk
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 disks for your crop/population range per the
Seed and Fertilizer Rate manual and the instructions
beginning on page 76 of this manual.
2. Open the shutter at planting rows to the
recommended initial setting (from the Seed Rate
charts). At unused rows, install a blank disk
(page 78) and close shutter.
3. Set sprocket indexing if staggering a twin-row crop
(see Seed and Fertilizer Rate manual for details).
4. Operate fan to achieve suggested manifold pressure
(Seed and Fertilizer Rate manual, and page 54).
5. Open slide gates to fill meters.
6. With all rows primed, rotate meters one turn to fill
pockets to edge of drop brush. Rotate the drive shaft
(top forward) with a
7 ⁄
8
inch (23 mm) wrench, or raise
and rotate ground drive wheel (top forward).
7. Leave fan running (to keep seed in top pockets).
Re-install rain covers. Commence planting.
Meter operation is automatic from this point on.
See also:
“Seed Pool Troubleshooting” on page 84,
“Meter Clean-Out” on page 98, and
“Meter Brush Maintenance” on page 101.
Figure 41
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