Great Plains PD8070 Operator Manual - Manual (Page 53)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 49
2014-07-23 Table of Contents Index 401-479M
Row-Unit Opener Adjustments
30 Series openers have three adjustments:
1. planting/seed depth
2. gauge wheel/opener disk clearance
3. opener disk angle
Setting Planting Depth
Refer to Figure 51
The “T” handle
sets planting depth by limiting the how
high the side depth gauge wheels ride relative to the
opener disks. The position of the seed tube itself is fixed
relative to the disks, and is not adjusted.
To adjust seed depth, pull the “T” handle up and back,
move it forward or aft, and set it back in a different pair of
holes in the scale.
• For shallower planting, move the “T” handle
forward.
• For deeper planting, move the “T” handle back.
Changing planting depth may also require changing disk
angle.
Disk Angle and Side Gauge Wheels
Refer to Figure 52
Disk angle affects seed groove angle/width, and may
need to be narrowed to achieve the desired seed depth
in some conditions.
Disk-to-wheel angle and clearance ideally has the wheel
just touching the disk when the wheel is raised to
planting depth (is up against the stop set by the “T”
handle). The goal is to have both disks and wheels turn
freely, but keep soil and trash from getting between them.
These two adjustments interact with each other.
Changing one requires at least checking the other.
In addition to changing the disk angle due to changing
depth or new field conditions, these two settings may
need attention over time as the disk and wheels wear
from normal use. This adjustment will also need to be
made if any opener components are replaced.
Figure 51
Opener Adjustments
25118
1
2
3
1
1
1
1
Figure 52
Disk/Gauge Wheel Alignment
Incorrect Correct
Side Gauge
Wheel
Opener
Disks
Side Gauge
Wheel