Great Plains 1625AHL Operator Manual - Manual (Page 87)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 83
2014-04-21 Table of Contents Index 411-020M
Row Unit Shut-Off
Skip-row operations, such as planting from every other
row when switching from 30 inch twin-row to 30 inch
single-row, requires shutting down unused rows.
Shutting off seeding at a row involves 4 to 7 steps:
1. Identify the rows to shut off (page 83).
2. Fully close seed inlet shutter (page 83).
3. Replace seed disk with blank disk (page 83).
4. Lock up row unit to reduce wear (optional, page 84).
5. Reset marker extension (Option, page 161).
6. Reset monitor active row pattern and row spacing to
avoid nuisance alarms (see Monitor manual).
7. Shut off fertilizer drop lines (Option, see Seed Rate
Manual 411-020B for details).
Note: Meter drive is not disabled on 25AH Series row
units during shut-off.
1. Identify Rows to Shut Off
On twin-row planters, openers are installed with short
and long opener mounts. If locking up unused rows of a
twin-row planter, shut off the rear (long mount) rows.
On single-row planters with mid-length mounts, any rows
may be locked up.
If not locking up rows, any rows may be shut off.
2. Close Seed Shutter
Refer to Figure 86 on page 83
Lift the handle
away from the plate. Move it to the top
position, and release the handle into the notch.
Closing the shutter prevents meter pressurization air
from leaking into the bulk seed air system, resulting in
lower pressures in adjacent rows, with risk of skips.
The shutter also stops seed flow from a row as soon as
the meter is empty. Bulk seed flow to the row falls to nil
as soon as the seed backs up to the air release vent at
the top of the meter.
3. Install Blank Disk
Refer to Figure 87
Clean out meter. See “Meter Clean-Out” on page 104.
Remove seed disk and install blank disk. See “Air-Pro
®
Meter Disk Installation” on page 81.
Figure 86
Seed Inlet Shutter Closed
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Irregular Seeding Risk:
Always use a blank disk in a shut-off row. Operating with no
disk, or with a seed disk but no seed, destabilizes the regulated
airflow, particularly at rows with pressure sensor lines.
Figure 87
Shutter Closed, Blank Disk Installed
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