Set initial extension and tension, Close-out, Marker operation – Great Plains NTA2007HD Installation Instructions User Manual
Page 14: Marker maintenance, Xtension is set at step 85.)

14
2014+ Single Fold Marker
Great Plains Mfg., Inc.
113-921M
2013-10-16
Set Initial Extension and Tension
84. With the implement still lowered, extend a marker
on one side. At full retraction, it should remain
suspended above the ground. Set the circuit to
Neutral and shut off hydraulics.
85. Set the approximate initial marker extension per the
instructions in the air drill implement Operator
manual. Because the implement is typically not into
the ground at this time, the setting is approximate.
86. Set the initial marker tension to 23 kg (50 lbs.) per
the instructions in the Operator manual.
Close-Out
87. Fold the markers.
88. Raise the implement.
89. Fold the implement.
90. Lower the implement into lift lock.
Marker Operation
Marker operation is covered thoroughly in the Operator
manual.
Marker Maintenance
Marker maintenance is covered thoroughly in the
Operator manual.