Great Plains 2525P Operator Manual - Manual (Page 32)

28 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.
118-231M 2013-05-10
Row Unit Adjustments
Refer to Figure 22 (which depicts a 25-Series row unit
fully populated with all optional accessories supported
for use with the 2020P, 2025P, 2520P and 2525P drill)
From front to back, a Great Plains 20 or 25 Series row
unit can include the following capabilities (some
optional):
1. Down Pressure Springs: standard
Each row unit is mounted on the drill with parallel
arms which allow each row unit to independently
move up and down while staying horizontal. Adjust-
able springs provide the force to get the row unit and
attachments into the soil. See “Row Unit Down
Pressure” on page 29.
2. Disk Coulter: optional, choice of blades
(25 Series only)
Coulters cut trash, and create a groove for light
no-till planting. The down force needed to cut and
widen the coulter groove is supplied by the row unit.
The depth relative to the opener is set by a choice of
hub mounting holes. See “25 Series Coulter
Adjustments” on page 34.
3. Disc Blades: standard, 2 per row unit
Double disc blades widen the coulter groove, creat-
ing the seed bed. Setup controls depth and width.
See “Row-Unit Opener Disc Adjustments” on
page 36.
4. Depth Side Gauge Wheels: standard
The depth gauge wheels have adjustments for spac-
ing and angle. See “Side Gauge Wheel Adjust-
ment” on page 37.
5. Seed meter: required, choice of models/features
Meters deliver singulated or volumetric seed. See
“Seed Meter Setup and Adjustment” on page 39.
6. Seed delivery tube: standard (not shown)
No adjustments are necessary.
7. Seed firmer (optional):
Keeton seed firmer (shown mounted)
Improves seed-soil contact. See See “Keeton Seed
Firmer Adjustment” on page 45.
Seed-Lok™ firming wheel (shown in inset)
Improves seed-soil contact. See “Seed-Lok™ Seed
Firmer Lock-Up (old style)” on page 46.
8. Gauge Wheel Scraper: optional
The depth gauge wheels also accept an optional
scraper. See “Adjusting 25 Series Gauge Wheel
Scrapers” on page 38.
9. Press wheels: standard (choice of types)
These close the seed trench. See “Press Wheel
Adjustment” on page 47.
Certain Machine Damage:
Do not back up with row units in the ground. To do so will
cause severe damage and row unit plugging.
Figure 22
25 Series Row Unit
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26219
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3
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4
7
5
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8
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