Great Plains 3N-3020P Operator Manual - Manual (Page 29)

4/23/2010 196-248M
27 Operating Instructions
Meter Operation
Refer to Figure 10
Before operation, make sure you are using the
correct seed meter wheel for the seed you are
using.
For information on meter adjustments, refer to
“Seeding Rate”, page 37.
If your drill has been exposed to the elements for
a period of time with seed in the boxes, check to
make sure the seed in the seed tubes and meters
has not become wet.
Spring-loaded
idler
Opener
seed tube
Seed
meter
Sliding
Seed tube
18286
Electric Clutch Operation
This unit is equipped with an electric clutch
mounted on each drive. This allows the operator
to selectively shut off one side of the drill at a time
to accommodate point row seeding.
The control box is mounted in the tractor cab and
has two on/off toggle switches with red indicator
lamps.
This unit is also equipped with an electric clutch
switch that automatically shuts off seed metering
to both sides whenever the unit is raised out of the
ground.
For information on “Electric Clutch Switch Adjust-
ments” see page 42.
Opener Operation
Do not back up with openers in the ground. To do so
will cause severe damage and opener plugging.
For information on opener adjustments, refer to
“Opener Adjustments,” page 33. For more infor-
mation on troubleshooting opener problems, see
“Troubleshooting”, page 48.
Marker Operation
Optional marker attachments are available from
your Great Plains dealer. Before operating mark-
ers, make sure hydraulics are properly bled as
described under “Marker Adjustments”, page 43.
Dual markers equipped with a sequence valve are
powered off the same hydraulic circuit. Starting
with both markers folded, the folding sequence is:
1. Activate lever - Right unfolds; left stays
folded.
2. Reverse lever - Right folds; left stays fold-
ed.
3. Activate lever - Left unfolds; right stays
folded.
4. Reverse lever - Left folds up; right stays
folded.
5. Sequence repeats.
You can adjust marker folding speed. Refer to
“Marker Adjustments”, page 43, and adjust folding
speed to a safe rate. Folding markers at high
speed can damage markers.
Figure 10