Great Plains YP3025 Operator Manual - Manual (Page 67)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 63
2013-09-09 Table of Contents Index 401-703M
Refer to Figure 67
The ideal amount of down-force causes the press wheels
to compress any loose surface soil, but not press a
trench into subsoil.
To assess down-force, operate the YP30 planter for a
short distance on typical ground (with or without seed-
ing), and stop. Leave the YP30 planter lowered (row
units in ground).
At several row units, inspect the furrow created by the
opener discs and closed by the press wheels.
Note: Be sure to inspect rows both in and out of tire
tracks.
Refer to Figure 68
1.
If the press 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
The springs allow the row units to float down into depres-
sions and up over obstructions.
With Unit-Mounted Coulters (or no coulters):
the row unit springs provide the primary down force for
cutting through residue and opening the seed trench.
Figure 67: 10HDP:
Checking Furrow
27064
{
Inspect Furrow Here
Light or no press wheel
tracks Insufficient down-force
Increase down-force
Press wheel(s) compress
loose soil only Ideal
No adjustment required
Press wheel(s)
making deep tracks Down-force too high
Reduce down-force
Figure 68: 10HDP:
Assessing Down-force
00000
1
2
3