Great Plains 3S-4010HDF Material Rate - Manual (Page 23)

Great Plains Mfg., Inc.
21
01/29/2009 196-522B
Small Seeds Rate
Seeding rate from the optional Small Seeds Attachment
is controlled entirely by seed rate handles on each small
seeds box. No sprocket changes are required, and small
seeds rate is unaffected by settings for main seed box.
Refer to Figure 11
To set Small Seeds rate, loosen the wing nut at each
handle, and adjust the lever position. Tighten nut.
Small Seeds Rate Calibration
Differences will exist between the tested seed and field
conditions used to generate the Small Seeds Rate
Charts, and your seed and conditions. To accurately
achieve your target population, Great Plains recom-
mends calibrating.
As small seed rates are typically far lower than main box
seed rates, use a scale that is accurate for small weight
differences, or sample more than the usual three rows.
1. Lower drill. Set MASTER switch on clutch control
box to OFF position.
2. Set the small seed rate handle based on the seed
and rate desired.
Refer to Figure 12
3. Remove the calibration crank from its storage loca-
tion on the right section drive. Remove pin from
crank and return to storage stob.
4. On the right drill section, if fertilizer rate is not also
being calibrated at the same time, and fertilizer is
present, remove a fertilizer box drive chain on the
right drill section.
Refer to Figure 13
5. Install crank on clutch shaft of right section.
Crank rotation is clockwise, facing to drill left.
6. Use crank to turn clutch shaft and check that the
drives and seed cups are engaged, working properly
and free from foreign material. If not already done,
set the Small Seeds Rate Handle.
Figure 11
Small Seeds Rate Handle
18511
For example: using a row spacing of:
7.5in
and a row count of:
64
you desire to plant alfalfa at:
8 lbs/ac;
this corresponds to an initial Seed Rate Handle of:
40
1
2
1
2
Figure 12
Stored Calibration Crank
29240
Figure 13
Installed Calibration Crank
28180