Great Plains 2510HDP Operator Manual - Manual (Page 29)

Great Plains Manufacturing, Inc. Table of Contents Index Preparation and Setup 25
2013-10-21 Table of Contents Index 118-245M
Marker Extension Setup
Check the marker extension, even if already
dealer-installed. The marker’s own installation
instructions may not have covered setting the correct
marker arm length, or may have specified a length not
optimal for your initial planting.
Refer to Figure 23
Set the initial marker extension
to the value for your
row spacing from the Appendix starting at page 136.
Measure from the centerline of the end row unit (outer
unit of a twin pair), whether that row is used or not, to the
mark left in the ground when the drill is lowered.
If you modify your row spacing, this can change the
marker extension required. Some custom row spacing
changes result in an asymmetric row spacing about
machine centerline. This usually causes the marker
extension to be different for left and right sides,
depending on the direction of planting for each
successive pass.
Make short practice passes to confirm correct marker
extension.
Marker Extension Adjustment
Refer to Figure 24
To adjust a marker width or disk pivot orientation:
1. Lower drill to field position and extend the marker
side to be adjusted.
2. If disk angle or direction is to be changed, make that
change before adjusting extension.
3. Pull forward to fully settle drill and leave a mark to
check.
4. On telescoping outer marker tubes, loosen both jam
nuts
and both 1 ⁄
2
in set screws .
5. Move marker disk tube in or out to get the desired
mark placement. See page 136 for suggested initial
marker extensions, measured from drill centerline.
6. To change throw direction of marker, remove inner
tube completely, and reinsert at desired orientation.
7. Tighten both 1 ⁄
2
in set screws and then both jam
nuts .
8. Pull forward to check actual results and fold marker.
Other marker topics in this manual include:
“Marker Operations” on page 32
“Marker Disk Angle” on page 66
“Marker Speed” on page 66
E
Figure 23
Marker Extension
E
Figure 24
Marker Extension Adjustment
19204
1
2
1 2
2
1