
3N-4010F, 3N-4010HDF, and 3N-4020F
Adjustments
83
2019-03-08
196-359M
20 Series Row-Unit Adjustments
Refer to Figure 126, which depicts a 20 Series row
unit fully populated with all features supported on
3N-4020F drill (excepting Seed-Lok). From front to
back, they are:
1. Dual Down-Pressure Springs & Cam (standard)
20 Series Row-Unit Down Pressure
page 84. 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 “
3. Side Depth Gauge Wheels (standard)
These wheels are the primary control of seeding
depth (set by the T-handle). They also have
adjustments for angle and disk contact. See “
4. 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 “
5. T-Handle (standard)
This handle sets the height of the side depth
gauge wheels. See “
6. Seed Firmer (optional)
An optional seed firmer (Keeton shown) minimizes
seed bounce and improves soil contact. See “
Series Seed Firmer Adjustments
7. 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 “
Certain Machine Damage:
Do not back up with row-units in the ground. This will cause
severe damage and row-unit plugging.
Figure 126
20 Series Row Unit
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