Great Plains 2N-3020 Operator Manual - Manual (Page 24)

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Section 3 Adjustments
2N-2420 and 2N-3020 Two-Section Folding No-Till Drill 196-164M-A 2/28/08
Great Plains Mfg., Inc.
Figure 3-7
Speed-Change Gearbox
2. Adjust Seed-Rate Handle
Position the handle (Figure 3-8) to the setting indicat-
ed on the seed-rate chart. To adjust, loosen the wing
nut under the handle and slide until indicator lines up
with desired setting. Retighten nut.
Figure 3-8
Seed-Rate Handle
3. Set Seed-Cup Doors
For wheat and other small seeds, move the seed-cup-
door handles to the highest position. For soybeans
and other large seeds, lower the handles to the sec-
ond position. If excessive seed cracking occurs, lower
the handles to the third position. For seed-cup clean
out, move the handles to the fourth, wide-open posi-
tion. Make sure all handles are in the same position
before drilling.
Gearbox Ratios:
Drive Type 2 is 2.06 Times Faster Than 1
Drive Type 3 is 3.08 Times Faster Than 1
Drive Type 4 is 5.03 Times Faster Than 1
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Figure 3-9
Seed-Cup Door Handle
4. Check Seeding Rate
a. Place several pounds of seed over the three seed
cups on the outside end of the drill box.
b. Disconnect the seed tubes from the three openers
fed by the covered cups.
c. Raise the drill off the ground.
d. Record the empty weight of a container large
enough to hold the seed metered for one acre.
e. Turn the gauge wheels to fill the seed cups. Turn
wheels until seed drops to the ground from each
cup.
f. Place a container under the three seed tubes to
gather the seed as it is metered.
g. Rotate the gauge wheel until one acre has been
tallied on the acremeter. This will be
about 225 rotations on a 24-foot drill and about
181 rotations on a 30-foot drill. Check that the
seed cups have plenty of seed coming into them.
h. Weigh the metered seed. Subtract the initial
weight of the container. Divide by three. Multiply
by the number of openers on your drill for the
pounds-per-acre seeding rate. If this figure is dif-
ferent than desired, re-adjust the seed-rate han-
dle and recheck the rate.
5. When satisfied with the seeding rate, repeat steps 1
through 3 for the other drill box, setting it to the same
rate.
Small Seeds Attachment
To set the seeding rate, refer to the small-seeds rate
charts on page 27. Move the seed-rate handle on the at-
tachment to the setting indicated on the chart.
To calibrate the attachment to your material, follow the
steps listed under Check Seeding Rate, this page.
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