25 series row unit adjustments – Great Plains YP4425A Operator Manual User Manual
Page 70
66
YP4425A
Great Plains Manufacturing, Inc.
401-805M
2012-02-23
25 Series Row Unit Adjustments
Refer to Figure 71 (which depicts a row unit populated
with most optional accessories supported for use with
the YP4425A Planter)
From front to back, a Great Plains 25 Series row unit can
include the following capabilities (some optional):
1.
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 67.
2.
Meter Pressurization Air Inlet (Standard)
Pressure-regulated air enters the meter here and
holds seed in the disc pockets. See “Fan and
Adjustment” on page 60.
3.
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
removed for inspection. There are no adjustments.
4.
Air-Pro
®
Seed Meter (Standard, Choice of Discs)
Meter Disc Installation” on page 77.
5.
Seed Inlet Shutter (Standard)
This controls the level of bulk seed at the disc. There
are four operating settings, plus fully open
(clean-out) and fully closed (shut-off or storage). See
“Seed Inlet Shutter Adjustment” on page 75.
6.
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 73.
7.
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 80.
8.
Row Cleaner (Option)
Row cleaners clear trash from the row, to a depth set
by an adjustment on the arms. See “Unit-Mount
Row Cleaner Adjustments” on page 69.
9.
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 70.
10. Opener Discs (Standard)
Row-unit double disc openers create the seedbed
furrow. They have adjustments for angle and
spacing. See “Row-Unit Opener Disc
Adjustments” on page 72.
11. Seed Tube with Sensor (Standard)
Requires no adjustment.
12. Scrapers (Optional, not shown)
Inside scrapers require no adjustment. For gauge
wheel scrapers, see “Adjusting Gauge Wheel
Scrapers” on page 74.
13. 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 79.
14. 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.
.epsi 5%
.epsi 43%
Figure 71
25 Series Row Unit
29600
5