GREAT PLAINS SPARTAN II NTA607-2-3275, Operator'S Manual, Page: 62 / 116

Great Plains | 166-486M | 2019/01/29 56
Spartan
II
607 Table of Contents Index Operation
Marker Adjustments
Crushing/Pinching Hazards
Make all adjustments with tractor
hydraulics shut down, and the marker
circuit in float. To avoid serious injury or
death, keep all persons clear of both
markers when making adjustments. The
marker that moves may not be the one
expected.
Sharp Object Hazard
Marker disks may be sharp. Use caution
when making adjustments in this area. If
removed, always install guard above
marker disk.
There are four operating adjustments for markers:
1. Marker tension adjustment - Adjust the spring
tension to make sure the markers track uneven
ground and do not drag excessively when folded.
2. Marker extension adjustment - Once set for a
specific row spacing, this only needs periodic
checking to make sure the clamp is secure.
3. Marker speed adjustment - Once initially set by
your dealer, this rarely needs modification.
4. Marker disk adjustment - Even if your row
spacing rarely changes, you may need to adjust
disk angle for soil conditions and planting speed.
Marker Tension Adjustment
The strength of the mark is a function of marker arm
weight at the disk. A spring (1) behind the pivot
assembly acts against some of that weight. The
spring is adjustable, and may be used to increase or
decrease force at the marker disk.
The suggested initial marking force is 23 kg. For
marking forces up to this value, use the weighing
scale included with the drill to lift the extended
marker disk.
To adjust the marking force:
1. Fold the markers. This minimizes spring tension
for adjustment.
2. Set the marker hydraulic circuit to neutral. Shut
off the tractor.
3. Loosen the eye bolt jam nut (2) on the top side of
the bracket.
4. Turn the adjust nut (3) to change marking force:
Loosen this nut (relaxing the spring) to increase
marking force.
Tighten this nut (tensioning the spring) to
decrease marking force.
5. Tighten the jam nut to secure the new setting.
If the marker spring force is set too low, the
marker may fail to return to its cradle when
folded.
Marker Extension Adjustment
At delivery, marker extension is typically set for
shipment (arm fully retracted), and needs to be reset
for field. Marker extension needs to be checked
periodically thereafter, and needs to be checked and
adjusted when:

tool bar height is changed,

marker disk angle is changed, or;

marker disk throw direction is changed.
Measure marker extension (A) in a representative
field conditions, with the openers in the ground, after
adjusting the tool bar height and wing weight
transfer. If openers are not at planting depth when
setting the extension, the gap will be too large during
planting.
Marker extension is measured on the ground, from
the centerline of the outside row unit to the disk
mark.
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