Great Plains 3N-4020 Operator Manual - Manual (Page 33)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 29
2013-10-29 Table of Contents Index 196-359M
Planting
Seed Rate
Seed rate on this family of drills is controlled by:
• Seed rate handles.
• Seed cup door handles.
• Rate set by the hydraulic drive console.
Set Seed Rate Handle
Refer to Figure 27
There are main box seed rate handles for each section of
the drill (3 handles total). All must be set identically.
The seed rate handle controls the percent engagement
of the seed sprocket in the seed cups. The setting of the
handle is given by the chart on page 40. These settings
have been chosen based on the seed size, and a coarse
rate that allows the hydraulic drive to provide optimal fine
rate control. Once set, the handles are not adjusted.
To set a handle:
1. Loosen wing nut under handle.
2. Consult the chart on page 40 for your seed and rate
range. Note the Rate Handle setting provided.
3. Move indicator to a scale value about 10 higher
than the setting from the chart. Then move handle
back to the chart setting.
4. Tighten wing nut.
Set Seed Cup Door
Refer to Figure 28,
which depicts the seed cup door handle in position
.
At each seed tube, adjust the seed cup door handle
for the seed size.
The handle has three normal operating position detents:
Note: Handle position is used for clean-out (page 101),
not planting. If set to this position with seed loaded,
it may be difficult to reset it to a normal operating
position.
(top detent) is for the smallest seeds.
Use it for wheat and similar small seeds.
(middle detent) is for larger seeds.
Use it for soybeans and similar larger seeds.
(bottom detent) is for oversize or fragile seeds.
If you experience excessive cracking with
setting
, use setting .
Figure 27
Seed Rate Handle
28181
6
7
6
7
Figure 28
Seed Cup Door Handle
26211
5
3
1
4
2
3
5
1
2
3
2 3
4