Great Plains NTA3007HD Operator Manual - Manual (Page 103)

Adjustments 99
04/04/2011 166-207M
Marker Adjustments
Review “Marker Safety Information” on page 61 before
adjusting markers. There are four operating adjustments
for markers:
• Disk Angle
Even if your row spacing rarely changes, you may
need to adjust disk angle for soil conditions and plant-
ing speed.
• Marker Extension
(in “Appendix B - Initial Setup”, page 163)
Once set for a specific row spacing, this only needs
periodic checking to ensure the clamp is secure.
• Chain Length
(in “Maintenance and Lubrication”, page 132)
You may want to adjust the chain length to ensure the
markers track uneven ground, and do not drag exces-
sively when markers are folded.
• Marker Speed
(in “Appendix B - Initial Setup”, page 163)
Once initially set by your dealer, this rarely needs
modification.
There are also two maintenance items for markers:
“Marker Hydraulic Bleeding” on page 131
“Marker Shear Bolt” on page 131
Marker Disk Adjustment
Marker disks may be sharp. Use caution when making adjust-
ments in this area.
Mark Width
Refer to Figure 109
is the direction of travel.
To change angle of cut, and the width of the mark, loosen
1 ⁄
2
-inch bolts holding the disk assembly.
For a wider mark , increase the angle of the marker
with respect to the tube . For a narrower mark ,
reduce the angle.
Tighten bolts .
Direction of Cut
To have the marker throw dirt out, invert the disk on the
spindle, and invert the disk assembly.
MetaData: End of Adjustments
You may be injured if hit by a folding or unfolding marker.
Markers may fall quickly and unexpectedly if the hydraulics
fail. Never allow anyone near the drill when folding or unfold-
ing the markers.
Null4:
Figure 109
Marker Disk Angle
11757
T
2
1
N
W T
Null4:
Figure 110
Marker Disk Inverted
11248
T
T
2
W
1 N
2