Great Plains 3PYP Operator Manual - Manual (Page 71)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 67
2014-09-09 Table of Contents Index 401-312M
Row-Unit Opener Adjustments
25 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 75
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.
• The 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 Depth Wheels
Refer to Figure 76
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 75
Opener Adjustments
25118
1
2
3
1
1
1
1
Incorrect Correct
Side Depth
Wheel
Opener
Disks
Side Depth
Wheel
Figure 76
Disk/Depth Wheel Alignment