Great Plains NTA3007 Operator Manual - Manual (Page 119)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 115
2012-07-02 Table of Contents Index 166-371M
Marker Adjustments
Review See “Marker Safety Information” on page 73
before adjusting markers. There are four operating
adjustments for markers:
• Disc Angle
Even if your row spacing rarely changes, you may
need to adjust disc angle for soil conditions and
planting speed.
• Marker Extension
(in “Appendix B - Initial Setup”, page 183)
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 147)
You may want to adjust the chain length to ensure the
markers track uneven ground, and do not drag
excessively when markers are folded.
• Marker Speed
(in “Appendix B - Initial Setup”, page 183)
Once initially set by your dealer, this rarely needs
modification.
There are also two maintenance items for markers:
See “Marker Hydraulic Bleeding” on page 133
See “Marker Shear Bolt” on page 133
Marker Disc Adjustment
Sharp Object Hazards:
Wear gloves. Use caution when making adjustments in this
area. Marker discs may be sharp and contaminated with soil.
Mark Width
is the direction of travel.
To change angle of cut, and the width of the mark, loosen
the
1 ⁄
2
-inch bolts holding the disc assembly.
Refer to Figure 119
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 disc on the
spindle, and invert the disc assembly.
Figure 118
Marker Disc Angle
11757
2
1
N
W T
Overhead Crush and Sharp Object Hazards:
You may be injured if hit by a folding or unfolding marker.
Markers may fall quickly and unexpectedly if the hydraulics
fail. Marker discs are sharp. Never allow anyone near the drill
when folding or unfolding the markers.
Figure 119
Marker Disc Inverted
11248
T
T
2
W
1 N
2