Great Plains EWD13 4109R+ Operator Manual - Manual (Page 22)

4/8/99 5-2
175-083M-A
SEED CALIBRATION (CON’T)
POSITIONING 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 second posi-
tion. If excessive seed cracking occurs, lower the handles
to the third position. Move the handles to the fourth, wide-
open position for seed-cup clean out. Make sure all han-
dles are in the same position before drilling.
Seed-Cup-Door Handle
Fig. 13
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CHECKING SEEDING RATE
1. Hydraulically lower the drill to planting position to acti-
vate clutch.
2. Check that your tires are 7.5 x 20 rib implement and
properly inflated. Refer to
Tire Inflation Chart, page 1-5.
3. Weigh an empty container large enough to hold the
seed metered for one acre.
4. Jack the drive (left) end wheel off the ground. Rotate
the wheel to see that the drive system is working properly
and seed cups are free from foreign material.
5. Place several pounds of seed over three seed cups on
an outside end of the drill box. Pull the seed tubes off of
these three openers.
6. Turn the drive wheel several times to fill the seed cups.
Turn the wheel until seed drops to the ground from all
three cups.
7. Place a container under the three tubes to gather me-
tered seed.
8. Rotate the drive wheel until one acre has been tallied
on the acremeter. This will be about 348 rotations. Check
that the three seed cups have plenty of seed coming into
them.
9. Weigh the metered seed. Subtract the initial weight of
the container. Divide by three. Multiply by the number of
openers on your drill to determine total pounds-per-acre
seeded. If this figure is different than desired, reset
sprockets accordingly.
NOTE: You may want to repeat the calibration procedure
if your results vary greatly from the seed-rate chart.
10. When drilling, check the rate by noting acres drilled,
amount of seed added to drill and seed level in drill box.
If you are seeding more or less than desired, adjust the
rate slightly to compensate for field conditions.
SETTING SEED RATE HANDLE
Position the handle shown in Fig. 12 to the setting indicat-
ed on the seed-rate chart. To adjust the handle, loosen
the wing nut under the handle and slide until the indicator
lines up with the correct setting.
Seed-Rate Handle
Fig. 12
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