25 series row unit adjustments – Great Plains 3PYPA Operator Manual User Manual
Page 71
Great Plains Manufacturing, Inc.
Adjustments
67
03/20/2012
401-647M
25 Series Row Unit Adjustments
Refer to Figure 77 (which depicts a row unit populated with
most optional accessories supported for use with the 3PYPA
Planter)
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)
See “Row Unit Shut-Off” on page 79.
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 68.
3.
Air Inlet (Standard)
Pressure-regulated air enters the meter here and
holds seed in the disk pockets. See “Fan and
Adjustment” on page 62.
4.
Seed Delivery Hose Inlet (Standard)
Air carrying the bulk seed is vented at the bottom of
the air release cone. Gravity then carries the seed
into the meter at the shutter
. The hose 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 78.
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 76.
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 74.
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 83.
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 79.
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 70.
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 71.
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 73.
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 75.
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 82.
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.
Null4:
Figure 77
25 Series Row Unit
29600
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