Great Plains YP2425A Operator Manual - Manual (Page 71)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 67
2014-02-10 Table of Contents Index 401-626M
25 Series Row Unit Adjustments
Refer to Figure 81
(which depicts a row unit populated with most optional
accessories supported for use with the YP2425A planter)
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 79.
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 68.
3. Meter Pressurization Air Inlet (Standard)
Pressure-regulated air enters the meter here and
holds seed in the disk pockets. See “Fan and Meter
Pressurization Adjustment” on page 59.
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
Adjustment” 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 84.
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
Adjustments” on page 71.
12. Opener Discs (Standard)
Row-unit double disc openers create the seedbed
furrow. They have adjustments for angle and
spacing. 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.
Do not back up with row units in the ground. To do so will
cause severe damage and row unit plugging.
Figure 81
25 Series Row Unit
29600
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