GREAT PLAINS SPARTAN II, Operator'S Manual, Page: 74 / 131

Spartan
II
607 Table of Contents Index Operation
Great Plains | 166-486M | 2020/10/08 67
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.
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.
Adjust the spring tension to make sure the markers
track uneven ground and do not drag excessively
when folded.
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 (relax the spring) to increase
marking force.
Tighten this nut (tension 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 current 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.
For limited down-flex drills, the row spacing does not
change at wing gaps. The marker extension is one
half the span (distance between end rows) plus a
gap of one row space.
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