NTA907HD and NTA3007HD
Operating Instructions
Great Plains
| 166-207M | 02/26/2019
61
Before Operating Markers
Marker circuits must be fully charged with oil and free of
air before operation. Prior to first use, or after
maintenance, perform “
Dual Marker Operation
Dual markers are on circuit which contains an adjustable
automatic sequence valve. This valve is on a hydraulic
circuit shared with Fold and Tilt cylinders.
1.
To prevent unexpected marker movement when
enabling the marker solenoid valve, set the shared
circuit to Neutral or Float before operating the
switches.
2.
Enable markers at the CFM switch. Set Fold and Tilt
off, then Marker on.
3.
Clear the area within 5m (15ft) of marker arms on
both sides of the drill.
Which marker side extends at circuit activation is
somewhat unpredictable, as it depends on the final
state of the sequence valve at last use.
4.
Carefully move the circuit lever to extend and
observe which marker side is extending.
5.
If the marker extending is not on the desired side,
reverse the lever (to retract) until the marker returns
to the cradle. Set the control to Neutral briefly, then to
Extend again. This cycles the sequence valve and
extends the alternate marker.
6.
When marker is fully extended, set circuit to Neutral.
7.
To fold marker, set circuit to Retract until marker is in
cradle.
8.
To extend other side, Extend once more, as at
step 5.
Special Dual-Marker Operations
Passes with same marker side:
•
Retract (raise) the marker and make the turn.
•
Begin to extend the opposite marker.
•
Retract it, and extend the original marker.
Both markers unfolded:
•
Fully extend one side.
•
Momentarily Retract, then Extend to deploy opposite
side.
Field Operations
Final Field Checklists
Use the following tables to develop a final checklist for
your tractor/Air Drill configuration. Additional or fewer
steps may be necessary depending on tractor features,
Air Drill options and planting accessories.
Marker Enable: Hydraulic Circuit Operation
Lift
Fan,
Auger
Fold, Tilt,
Marker
Transport
Hooks
Neutral
Neutral
Neutral
Neutral
Figure 67
CFM Marker Enable
29380
Marker Extend: Hydraulic Circuit Operation
Lift
Fan,
Auger
Fold, Tilt,
Marker
Transport
Hooks
Neutral
Neutral
Extend
Neutral
Marker Fold: Hydraulic Circuit Operation
Lift
Fan,
Auger
Fold, Tilt,
Marker
Transport
Hooks
Neutral
Neutral
Retract
Neutral
Figure 68
CFM Marker Enable
29380
Summary of Contents for NTA3007HD
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