Great Plains NTA2007 Operator Manual - Manual (Page 67)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 63
2012-01-05 Table of Contents Index 166-372M
Marker Unfold and Fold
1. Clear the area within 4m (12ft) of marker arms on
both sides of the drill.
2. Carefully move the circuit lever to extend and
observe which marker side is extending.
Refer to Figure 54
3.
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.
4. When marker is fully extended, set circuit to Neutral.
5. To fold marker, set circuit to Retract until marker is in
cradle.
6. To extend other side, Extend once more, as at
step 3.
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.
Figure 55
Marker Unfolded
31178
Note: Which marker side extends at circuit activation is
somewhat unpredictable, as it depends on the
final state of the sequence valve at last use.
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