20 series row-unit adjustments – Great Plains YP1220 Operator Manual User Manual
Page 47
Great Plains Manufacturing, Inc.
Adjustments
43
03/14/2012
401-506M
20 Series Row-Unit Adjustments
Refer to Figure 45, 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 “Row-Unit Down Pressure” on page 44. 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 horizontal. 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 “Row-Unit Down Pres-
sure” on page 44.
3.
Seed Meter (standard - choice of wheels)
A Singulator Plus meter
is standard. One or more
sets of seed wheels must be selected. See “Meter
Wheel Replacement” on page 46.
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 Adjustments” on page 45.
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. See “Seed
Firmer Adjustments” on page 47.
6.
T-Handle (standard)
This handle
sets the height of the side depth
gauge wheels. See “Row-Unit Planting Depth” on
page 44.
7.
Seed Firmer (optional)
An optional seed firmer (Keeton shown) minimizes
seed bounce and improves soil contact. See “Seed
Firmer Adjustments” on page 47.
8.
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
Wheels” on page 48.
Certain Machine Damage:
Do not back up with row-units in the ground. This will cause
severe damage and row-unit plugging.
FigureSpacer:
Figure 45
20 Series Air Row Unit
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