Great Plains YP3025 Operator Manual - Manual (Page 70)

66 YP3010HDP/3020P/3025 Table of Contents Index Great Plains Manufacturing, Inc.
401-703M Table of Contents Index 2013-09-09
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 trac-
tor tires so they are not ahead of 30in or 70cm rows.
Refer to Figure 76
Use only enough down pressure to open the furrow and
maintain proper soil-firming over seed. Excessive down
force leads to premature wear on row unit components,
uneven seed depth and gauge wheel slippage.
Refer to Figure 75 (shown at cam setting 1),
Figure 76 and Figure 77
To adjust down pressure, use a 1
1 ⁄
8
in (29mm) open end
wrench or the tool stored under the walkboard.
1. Raise the planter. Although this adjustment can be
made with the planter lowered, the springs will be in
tension, causing more effort, and the optional
Row-Pro™ system might be active, and fighting you.
The extra force required might also damage tools.
2. Install lift cylinder locks.
3. 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 .
Note: Do not set all rows higher than notch 4. Using high
settings across all rows causes uneven planting.
Individual rows may be set higher if running in tire
tracks.
Note: With the optional Row-Pro™ system, do not use
higher cam settings for rows in tire tracks unless
there is actual need. If these rows do not need the
extra force, the cam setting could imbalance the
Row-Pro™ system.
Figure 75
25 Series Row Unit
Spring Adjustment
25268
2
3
5
4
6
2
Cam Notch Pounds Kilograms
zero (out of notch) Lock-Up & Maintenance
one 345 155
two 370 170
three 400 180
four 450 205
five 500 225
six 550 250
tip Do Not Use
31454
3
Figure 76
Row Unit Minimum Cam (1)
27065
4
5
2
6
Figure 77
Row Unit Maximum Cam (6)
27065