25ap series row unit adjustments – Great Plains 2525A Operator Manual User Manual
Page 41
Great Plains Manufacturing, Inc.
Adjustments
37
2013-06-04
118-999M
25AP Series Row Unit Adjustments
Refer to Figure 22 (which depicts a row unit populated
with most optional accessories supported for use with
the 3-Point drill)
From front to back, a Great Plains 25 Series Air-Pro
®
row
unit (25AP) can include the following capabilities (some
optional):
1.
Lock-Up Pin Storage Hole (Hole Standard)
See “Row Unit Shut-Off” on page 49.
2.
Down-Pressure Cam (Standard)
Row units are mounted on parallel arms. This paral-
lel-action mounting allows the row-unit to move up
and down while staying horizontal. Springs add an
adjustable force, set by the cam, to the row weight.
See “Row Unit Down Pressure” on page 38.
3.
Air Inlet (Standard)
Pressure-regulated air enters the meter here and
holds seed in the disk pockets. See “Fan and
Adjustment” on page 35.
4.
Seed Delivery Inlet (Standard)
Gravity carries seed from the seed box into the
meter at the shutter
. The tube is easily removed
for inspection. There are no adjustments.
5.
Air-Pro
®
Seed Meter (Standard, Choice of Disks)
See “Air-Pro® Meter Disk Installation” on page 48.
6.
Seed Inlet Shutter (Standard)
This controls the level of bulk seed at the disk. There
are four operating settings, plus fully open
(clean-out) and fully closed (shut-off or storage). See
“Seed Inlet Shutter Adjustment” on page 46.
7.
Side Gauge Wheel Depth (Standard)
The T-handle sets planting depth by controlling the
height of the side gauge wheels relative to the
opener discs. See “Side Gauge Wheel Adjust-
ment” on page 44.
8.
Press Wheel Force, Angle, Stagger (Standard)
The press wheels close the furrow, gently pressing
the soil over the seed to ensure good seed to soil
contact for even emergence. See “Press Wheel
Adjustment” on page 54.
9.
Row Unit Lock-Up Hole (Hole Standard)
Pins are standard on some models. With the row unit
raised above level, the lock-up pin is inserted here.
See “Row Unit Shut-Off” on page 49.
10. Row Cleaner (Option)
Row cleaners clear trash from the row, to a depth set
by an adjustment on the arms. See “Unit-Mount
Cleaner Adjustments” on page 40.
11. Unit-Mount Coulter (Option)
Coulters cut remaining trash and begin opening the
seed furrow. Working depth is set by row depth and a
mounting hole selection. See “Coulter Adjust-
ments” on page 41.
12. Opener Discs (Standard)
Row-unit double disc openers create the seedbed
furrow. They have adjustments for angle and spac-
ing. See “Row-Unit Opener Disk Adjustments” on
page 43.
13. Seed Tube with Sensor (Standard)
Requires no adjustment.
14. Scrapers (Optional, not shown)
Inside scrapers require no adjustment. For gauge
wheel scrapers, see “Adjusting Gauge Wheel
Scrapers” on page 45.
15. Seed Firmers (Seed Flap Standard, not shown)
An optional seed firmer (Keeton shown) minimizes
seed bounce and improves soil contact. It may also
deliver fertilizer. See “Seed Firmer Adjustments”
on page 52.
16. Press Wheel Type (Choice)
A variety of single and dual press wheel assemblies
are available, some region-specific. Consult your
Great Plains dealer.
Do not back up with row units in the ground. To do so will
cause severe damage and row unit plugging.
Figure 22
25AP Series Row Unit
29600
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