Great Plains 3N-3020 Operator Manual - Manual (Page 30)

3N-3010 and 3N-3020
196-366M 3/29/2012
28
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 seeding to both
sides whenever the unit is raised out of the
ground.
For information on “Electric Clutch Switch Adjust-
ments” see page 41.
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 34. For more infor-
mation on troubleshooting opener problems, see
“Troubleshooting”, page 47.
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 42.
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 42, and adjust folding
speed to a safe rate. Folding markers at high
speed can damage markers.