Great Plains 3PNG15 Operator Manual - Manual (Page 50)

46 3PNG12 and 3PNG15 Great Plains Manufacturing, Inc.
202-553M 10/06/2008
Marker Extensions
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, depend-
ing on the direction of planting for each successive pass.
Make short practice passes to confirm correct marker
extension.
Marker Extension Adjustment
Refer to Figure 39
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.
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 Operation” on page 18
“Marker Disk Angle” on page 23
“Marker Speed” on page 23
Figure 39
Marker Extension Adjustment
19204
1
2
1 2
2
1