![GREAT PLAINS Yield-Pro 3P3025AH Operator'S Manual Download Page 68](http://html.mh-extra.com/html/great-plains/yield-pro-3p3025ah/yield-pro-3p3025ah_operators-manual_2259521068.webp)
Great Plains
| 411-332M | 2019-02-19
64
3P3025AH
Adjustments
An adjuster cam
sets down pressure individually for
each row unit. This is useful for penetrating hard soil and
planting in tire tracks. For best results always adjust
tractor tires so they are not ahead of 30 inch or 70 cm
rows.
Values are down force with hoppers empty.
Use only enough down pressure to cut the seed trench
and maintain proper soil-firming over seed. Excessive
row unit down force will lead to premature wear on row
unit components, uneven seed depth and gauge wheel
slippage.
Refer to Figure 71 (shown at cam setting 2), and
To adjust down pressure, use a 1
1
/
8
inch (29 mm) open
end wrench or the tool
stored in a bracket at the left
side or the #1 row mount.
1. Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, and will require more effort. The extra force
required may also damage tools.
2. Install lift cylinder locks on a 2-point lift-assist model.
3. Set tractor hitch circuit to Neutral. Put tractor in Park
and shut it off.
4. Position wrench on the fixed nut
near or slightly
forward of vertical.
5. Pull upper spring link
back.
6. Move the adjustment cam
to the new setting on
the spring adjust bar
.
Do not set all rows higher than notch four. Using high
settings across all rows causes uneven planting.
Individual rows may be set higher if running in tire
tracks. On twin-row configurations, setting all rows to
notch 4 or higher results in a net up force that can
exceed the weight of the planter when the hoppers
are nearing empty.
Hole Number
Pounds
Kilograms
zero (out of notch)
Lock-up & Maintenance
one
255
115
two
265
120
three
285
130
four
315
145
five
345
155
six
375
170
tip
Do Not Use
Figure 70
25AP Series Row Unit
Spring Adjustment
31034
3
5
2
Figure 71
Row Unit Minimum Cam (at 1)
27065
bottom
4
6
Figure 72
Row Unit Maximum Cam (at 6)
27065
top