Great Plains YP3025 Operator Manual - Manual (Page 62)

58 YP3010HDP/3020P/3025 Table of Contents Index Great Plains Manufacturing, Inc.
401-703M Table of Contents Index 2013-09-09
20P Series Row Adjustments
Refer to Figure 61, which depicts a 20 Series row unit fully
populated with all features supported on YP1220 (excepting
Seed-Lok). From front to back, they are:
1.
Dual Down-Pressure Springs & Cam (standard)
See “20P Series Down-Pressure” on page 64.
Each row-unit is mounted on the planter with parallel
arms. This parallel-action mounting allows the
row-unit to move up and down while staying horizon-
tal. A cam
adjusts the force between 100 and 225
pounds.
2. Double Disk Openers (standard)
A pair of canted opener disk blades
open a furrow
and keep it clear for the seed tube. These disks are
adjustable for contact. See “20P Opener Depth” on
page 60.
3. Seed Meter (standard - choice of wheels)
A Singulator Plus meter
is standard. One or more
sets of seed wheels must be selected. See “20P
Meter Wheel Replacement” on page 80.
4. Side Depth Gauge Wheels (standard)
These wheels
are the primary control of seeding
depth (set by the T-handle). They also have adjust-
ments for angle and disk contact. See “Side Gauge
Wheel Adjustment” on page 71.
5. Seed Tube (standard)
A seed tube mounted between the disks (not shown)
delivers seed to the trench. It is fed by the seed
meter, and has a seed flap
, shown here cut back
for clearance from the seed firmer.
6. T-Handle (standard)
This handle
sets the height of the side depth
gauge wheels. See “20P Opener Depth” on
page 60.
7. Seed Firmer (optional)
An optional seed firmer (Keeton shown) minimizes
seed bounce and improves soil contact. See “Seed
Firmer Adjustments” on page 81.
8. Gauge Wheel Scraper: optional (not shown)
The depth gauge wheels also accept an optional
scraper. See “Gauge Wheel Scraper Adjustments”
on page 73.
9. Press Wheels (standard)
The press wheels close the furrow, gently pressing
the soil over the seed to ensure good seed to soil
contact for even emergence. They have adjustments
for down-pressure, stagger and angles. See “Press
Wheel Adjustment” on page 83.
Machine Damage Hazard:
Do not back up with row-units in the ground. This will cause
severe damage and row-unit plugging.
Figure 61
20 Series Row Unit
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