Great Plains 2525P Operator Manual - Manual (Page 33)

Great Plains Manufacturing, Inc. Adjustments 29
2013-05-10 118-231M
Row Unit Down Pressure
Refer to Figure 23
The ideal amount of down-force causes the side gauge
wheels to compress any loose surface soil, but not press
a trench into subsoil.
To assess down-force, operate the drill for a short dis-
tance on typical ground (with or without seeding), and
stop. Leave the drill lowered (row units in ground).
At several row units, inspect the furrow created by the
opener discs, but prior to furrow closing by the press
wheels.
Note: Be sure to inspect rows both in and out of tire
tracks.
Refer to Figure 24
1.
If the side gauge wheels are leaving no tracks, or
light tracks, increase down-force.
2. If the wheels are compressing trash and loose soil,
and leaving clear tracks right at the top of the sub-
soil, down-force is probably correct and needs no
adjustment.
3. If the wheels are creating a trench into the subsoil,
down-force is too high and needs to be reduced.
Adjusting Row Unit Down Force
Row unit springs provide the primary down pressure
necessary for row unit disks to open a seed trench.
The springs allow the row units to float down into
depressions and up over obstructions. Springs also pro-
vide down force on coulters when using optional row
mounted coulters, and provide the primary down force
on openers, seed firmers (optional) and press wheels.
The adjustment process is different for 20-Series and
25-Series row units.
If you cannot achieve enough down force, adding a
weight kit may help. See “Weight Bracket Kit” on
page 71.
Figure 23
Checking Furrow
26219
{
Inspect Furrow Here
Light or no side gauge
wheel tracks Insufficient down-force
Increase down-force
Gauge wheels compress
loose soil only Ideal
No adjustment required
Side gauge wheels
making deep tracks Down-force too high
Reduce down-force
Figure 24
Assessing Down-force
1
2
3