Great Plains 3N-4020 Operator Manual - Manual (Page 79)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 75
2013-10-29 Table of Contents Index 196-359M
10HD Series Row Unit Adjustments
Refer to Figure 101
(which depicts a row unit fully populated with all optional
accessories supported for use with the 3N-4010HDF
drill)
From front to back, a Great Plains 10HD Series row unit
can include the following capabilities (some optional):
1. Unit-Mounted Coulter (UMC): optional
UMCs are used instead of frame-mounted coulters
and are often preferred where soils are not rocky.
2. Dual Down Pressure Springs: standard
Each row unit is mounted on the drill via parallel
arms which allow the row unit to independently move
up and down while remaining parallel to the ground.
The adjustable spring provides the force to get the
row unit and attachments into the soil.
3. Row Unit Spring Cam: standard
This adjustment sets the down-force used by the row
unit. See “10 Series Row Unit Down Pressure” on
page 71.
4. Row-Unit Lock-Up: hole standard, pin optional
If rows are shut off with seed tube plugs, row unit
wear can be reduced by locking them up. 10HD Row
Unit Lock-Up.
5. Disc Blades: standard, 2 per row unit
Double disc blades open a furrow, creating the seed
bed. Spacers adjust the blades for a clean furrow.
See “10 Series Disk Blade Adjustments” on
page 72.
6. Scraper Separator: standard
No adjustments are necessary.
7. Seed delivery tube: standard
No adjustments are necessary.
8. Seed firmer:
reduces seed bounce and aids emergence by press-
ing seed gently into the furrow.
A seed flap (not shown) is standard.
Keeton seed firmer (not shown)
Improves seed-soil contact, and provides a stable
arm for a low-rate liquid fertilizer delivery tube. See
“10 Series Keeton Adjustment” on page 73.
Seed-Lok™ firming wheel (shown)
Improves seed-soil contact. See “10 Series
Seed-Lok™ Lock-Up” on page 74.
9. Press wheels: standard (choice of types)
These close the seed trench. The wheels also sup-
port the free end of the row unit, and provide the pri-
mary control over seeding depth. See “10 Series
Opener Depth” on page 74.
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 111
10HD Series Row Unit
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