Great Plains 2525P Operator Manual - Manual (Page 40)

36 2020P/2025P and 2520P/2525P Great Plains Manufacturing, Inc.
118-231M 2013-05-10
Row-Unit Opener Disc Adjustments
20 and 25 Series openers have three adjustments:
1. planting/seed depth
2. opener disc to disc clearance
3. gauge wheel/opener disk clearance
Setting Planting Depth
Refer to Figure 42
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 for-
ward.
• For deeper planting, move the “T” handle back.
Opener Disc Contact Region
Refer to Figure 43
Opener disc angle and stagger is not adjustable, but
disc-to-disc spacing is, and may need attention as discs
experience normal wear. Spacers will need to be reset
when blades are replaced.
The ideal spacing causes the blades to be in contact for
about one inch
. If you insert two pieces of paper
between the blades, they should slide to within about
1.5in of each other.
If the contact region is significantly larger or smaller (or
there is no contact at all), it needs to be adjusted by
moving one or more spacer washers.
Adjusting Disc Contact
Refer to Figure 43 and Figure 44
1.
Raise the drill.
2. Remove the side gauge wheels on the row unit in
need of adjustment.
3. Remove the bolt retaining the opener disc on
one side. Carefully remove the disc. Do not lose the
hub components and spacer washers
, .
4. To reduce the spacing between the discs (the nor-
mal case), move one spacer washer from the inside
to the outside of the disc.
5. Re-assemble and check disc contact.
2
3
1
Figure 42
Opener Adjustments
25118
18285
25 Series
20 Series
1
1
1
1
1
Figure 43
Opener Disc Contact Region
26127
1
2
1
Figure 44
Opener Disc Spacers
26128
6
5
3
4
2
3 4
5 6
5 6