GREAT PLAINS 3S-4000, Operator'S Manual

Page: 70 / 126

2018-06-19 Table of Contents Index 195-442M
3S-4000, 3S-4000F, 3S-4000HD, 3S-4000HDF Table of Contents Index Adjustments 66
Marker Extension
Marker extension depends on drill size, row unit spacing
and row units in use.
See “ Marker Setup ” on page 25 for initial values for
marker extension.
Refer to Figure 69
To adjust marker width, loosen two U-bolt nuts and
slide arm tube in or out.
Marker Setup
Refer to Figure 70
Markers are field-installed, but usually do not have their
extension length precisely set. The drill must be leveled
per “
Leveling The Drill ” on page 81, and marker(s) must
be in correct working order per “ Marker Maintenance ”
on page 88.
Row unit centerline stations on 3S-4000 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 27).
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 .
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.

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.
Model 00&HD
Spacing Extension
3S-4000-4810 10 in
245.0in
(622.3cm)
3S-4000-6375 7.5 in
242.0in
(614.7cm)
3S-4000-7806 6 in
240.5in
(610.9cm)
Figure 69
Marker Extension Adjustment
18878
1
2
1
2
Figure 70
Marker Extension
R
E
H
S
E
H S R
R E