Great Plains
| 411-332M | 2019-02-19
62
3P3025AH
Adjustments
25AP Series Row Unit Adjustments
(which depicts a row unit populated with most
optional accessories supported for use with the
3P3025AH.
From front to back, a Great Plains 25 Series Air-Pro
®
row unit can include the following capabilities (some
optional):
1.
Lock-Up Pin Storage Hole
(Hole Standard)
2.
Down-Pressure Cam
(Standard)
Row units are mounted on parallel arms. This
parallel-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
3.
Meter Pressurization Air Inlet
(Standard)
Pressure-regulated air enters the meter here and
holds seed in the disc pockets. See “
4.
Seed Delivery Inlet
(Standard)
Gravity carries the seed from the hopper into the
meter at the shutter . There are no adjustments.
5.
Air-Pro Seed Meter
(Standard, Choice of Discs)
Air-Pro Meter Disc Installation
6.
Seed Inlet Shutter
(Standard)
This controls the level of bulk seed at the disc. There
are multiple operating settings, plus fully open
(clean-out) and fully closed (shut-off or storage). See
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 “
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 “
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.
10.
Row Cleaner
(Option - Not shown)
Row cleaners clear trash from the row, to a depth set
by an adjustment on the arms. See “
Cannot be used with a unit-mount coulter
11.
Unit-Mount Coulter
(Option - Not shown)
Coulters cut remaining trash and begin opening the
seed furrow. Working depth is set by row depth and
a mounting hole selection. See “
Cannot be used with row cleaner.
12.
Opener Discs
(Standard)
Row-unit double disc openers create the seedbed
furrow. They have adjustments for angle and
spacing. See “
13.
Seed Tube with Sensor
(Standard)
Requires no adjustment.
14.
Scrapers
(Optional, not shown)
Inside scrapers require no adjustment. For gauge
wheel scrapers, see “
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 “
16.
Press Wheel Type
(Choice)
A variety of single and dual press wheel assemblies
are available, some region-specific. Consult your
Great Plains dealer.
Equipment Damage Risk:
Do not back up with row units in the ground. To do so will
cause row unit plugging and may result in severe damage.
Figure 66
25AP Series Row Unit
38552
5