Great Plains 2000 Material Rate - Manual (Page 14)

Great Plains Mfg., Inc.
12
118-389B 05/30/2008
Small Seeds Attachment
Small Seeds Cup Lever Adjustment
Position the small seeds seed cup lever to setting indi-
cated on Small Seeds Seed Rate Chart. To adjust,
loosen wing nut under handle. Slide handle until indi-
cator lines up with correct setting. Tighten wing nut.
Note: Drive Type handle and Main Seed Rate handle
are only used for Main seed box. They have no
effect on Small Seeds rates.
To set and calibrate the seeding rate on the optional
small seeds attachment, follow these steps.
1. Record weight of an empty container large enough
to hold seed metered for one acre.
2. Place several pounds of seed over three seed
cups on an outside end of small seeds box. Pull
drop tube of these seed cups from their hose
mounts.
3. Raise drill off the ground. If using a hitch, insert
transport lock pins or turn 90˚ hydraulic lock valve,
depending on hitch style.
4. Turn drive gauge wheel a few turns to fill cups with
seed. Turn wheel until seed drops to the ground
from all three cups.
5. Place a container under the three seed tubes to
gather seed as it is metered.
6. Turn drive gauge wheel for one acre:
450 rotations on a 12-foot drill,
364 rotations on a 15-foot drill, or
283 rotations on a 20-foot drill.
Check that the three seed cups have plenty of
seed coming into them.
7. Weigh the metered seed. Subtract initial weight of
the empty container. Divide by three for the
amount metered by each seed cup, then multiply
by the number of drill openers for the pounds-per-
acre seeding rate. If this figure is different than
desired, adjust seed-rate handle and recheck the
rate.
Note: If your results vary greatly from the charts, you
may want to repeat the calibration procedure.
8. When drilling, note acres drilled, amount of seed
added and level of seed in drill box. If you are
seeding more or less than desired, adjust seeding
rate slightly to compensate for field conditions.
Figure 4
Small Seeds Seed Cup
Lever Adjustment
18511
1
2
Drill
Model
Revolutions for One
Acre Hectare
12-foot 450 1112
15-foot 364 900
20-foot 283 699
MeasuredSeed EmptyContainer –
3
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PoundsPerSeedCup =
PoundsPerSeedCup NumberOfOpeners × PoundsPerAcre =