25 series row unit adjustments – Great Plains YP4025A Operator Manual User Manual
Page 75
Great Plains Manufacturing, Inc.
Adjustments
71
2013-04-24
401-627M
25 Series Row Unit Adjustments
Refer to Figure 78 (which depicts a row unit populated
with most optional accessories supported for use with
the YP4025A)
From front to back, a Great Plains 25 Series row unit can
include the following capabilities (some optional):
1.
Lock-Up Pin Storage Hole (Hole Standard)
See “Row Unit Shut-Off” on page 84.
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
weight. See “Row Unit Down Pressure” on
page 72.
3.
Air Inlet (Standard)
Pressure-regulated air enters the meter here and
holds seed in the disk pockets. See “Fan and
Adjustment” on page 63.
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)
Meter Disk Installation” on page 82.
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 80.
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 78.
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 87.
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 84.
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 74.
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 75.
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 77.
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 79.
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 86.
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 78
25 Series Row Unit
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