Great Plains 2S-2600HDF Operator Manual v1 - Manual (Page 56)

52 2S-2600/F/HD/HDF Table of Contents Index Great Plains Manufacturing, Inc.
195-440M Table of Contents Index 2014-05-16
Opener-Subframe Adjustment
Refer to Figure 52
Each drill section has an opener frame which pivots
about the centerline of the drill gauge wheels. These
floating opener frames have the ability to rock the
openers 15 degrees up and 15 degrees down as a
group. By pivoting at the gauge wheels, openers
maintain a consistent depth as opener frames rock up
and back.
Down pressure for each opener frame is provided by two
cylinders working on a constant lever arm. When
combined with live hydraulics, the cylinders provide
constant down pressure across the width of each opener
frame – regardless of how the frame is positioned. Two
cylinders per opener frame along with special trunnions
also provide some ability for one end of an opener
frame to rock independent of the other while maintaining
constant opener down pressure across the frame.
At higher down-pressures (above 2100 psi), the row units
can tend to tip forward. An adjustment to the
mainframe/subframe pivot corrects this.The opener
frame has one adjustment point
for two different
operating positions.
Refer to Figure 53 (shown in factory default configuration)
You can adjust opener frames between two operating
positions–one for normal down pressure and one for
higher down pressure. The adjustment is near the
opener frame pivots. There are three holes and two
bolts. The bottom bolt
serves as the pivot. The top bolt
is for adjustment.
Normal Down Pressure below 2100 psi
• For normal drilling conditions, keep top bolt in second
(middle) hole at all six frame pivots. Use this setting
when drilling with opener down pressure below 2100
psi. Use the chart “Pounds of Force at Opener
Disks” on this page at right.
High Down Pressure above 2100 psi
• When drilling with opener down pressure above 2100
psi, place top bolt in top hole on all six pivot points
across drill. Use the chart “Pounds of Force at
Opener Disks” on page 51.
Figure 52
Opener-Frame Pivot
18857
1
2
1
2
2
Figure 53
Opener-Frame Adjustment
15558
3
4
5
3
4
5