Marker setup – Great Plains 3S-4000HDF Operator Manual User Manual
Page 28
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3S-4000HD/HDF
Great Plains Manufacturing, Inc.
195-067M
2013-06-13
Marker Setup
Refer to Figure 15
Markers are field-installed, but usually do not have their
extension length
precisely set. The drill must be
leveled per “Leveling the 3S-4000HD/HDF Drill” on
page 80, and marker(s) must be in correct working order
per “Marker Maintenance” on page 86.
Row unit centerline stations on 3S-4000HD/HDF drills
are symmetrical about machine center, so left and right
extensions are normally identical, for both opposing and
concentric passes.
Set the initial length of the marker(s) as follows:
1.
Lower drill and openers to field position (“Raising
and Lowering Openers” on page 26).
2.
Extend a marker on one side. Pull forward several
feet to leave a mark.
3.
Sighting parallel to the main tool bar, measure from
the centerline of the outside row unit to the mark.
4.
Adjust the marker extension
so that the mark is
one half
the span
plus one row unit spacing
.
“Marker Adjustments” on page 66 for setting
marker extension.
5.
Pull forward several feet, and re-measure to verify
any adjustment. Validate the mark by making a pass
to one or both sides.
6.
Fold marker. Extend other side and adjust.
Note: If field conditions require inverting the marker disk
(page 67), the mark moves, and the extension
needs to be re-measured and reset. Marking also
changes slightly if the opener frame trunnion
position is changed (page 60).
Models
Spacing
Extension
10 inch
245.0in
(622.3cm)
7.5 inch
242.0in
(614.7cm)
6 inch
240.5in
(610.9cm)
R
E
H
S
Figure 15
Marker Extension
E
E
H
S
R
R
E