Great Plains 2515 Operator Manual - Manual (Page 16)

14
Section 3 Adjustments
1515, 2015 and 2515 Three-Point Soybean Machine 173-159M 4/20/05
Great Plains Mfg., Inc.
Section 3
Adjustments
Row Unit Adjustments
Down Pressure
Springs provide the down pressure necessary for opener
disks to open a seed trench. The springs allow the row unit
to float down into depressions and up over obstructions.
You can adjust down pressure individually for each row
unit. Use only enough down pressure to cut the seed
trench and maintain proper soil-firming over seed. Exces-
sive down pressure will lead to premature wear on row-
unit components.
To adjust, lift T-handle shown in Figure 3-1.
• Move T-handle back to increase spring pressure.
• Move T-handle ahead toward tractor to decrease
spring pressure.
Figure 3-1
Row Unit Spring Adjustment
Refer to the charts below for the amount of spring pres-
sure at the opener for each spring setting.
Down Pressure Charts
Coulter Depth
Optional coulters allow drill to penetrate tough ground
conditions. Adjust coulters to the same depth as the open-
er disks.
1. To adjust coulter depth, loosen 3/4-inch jam nut (1)
and 3/4-by-3-inch hex bolt (2). See Figure 3-2.
2. By turning cam hex (3), rotate the cam casting to the
desired height. Each notch represents about 1/4 inch
of depth.
3. Torque bolt and jam nut to values recommended on
Torque Values Chart, “Appendix,” page 34.
Figure 3-2
Row Unit Mounted Coulter
Opener Seeding Depth
Seeding depth is controlled by gauge wheels mounted on
the sides of the opener disks.
To adjust seeding depth:
1. Raise drill to remove weight from gauge wheels.
2. Raise and move T-handle.
• Move T-handle ahead to decrease seeding depth.
• Move T-handle back to increase seeding depth.
3. Move T-handles on all row units to the same location.
Figure 3-3
Opener Depth Adjustment
Medium-Duty Spring Package
First Holes (Closest to Tractor) 260 lb
Second Holes 280 lb
Third Holes 310 lb
Fourth Holes 330 lb
Fifth Holes (Closest to Drill) 350 lb
Heavy-Duty Spring Package
First Holes (Closest to Tractor) 360 lb
Second Holes 400 lb
Third Holes 440 lb
Fourth Holes 470 lb
Fifth Holes (Closest to Drill) 530 lb
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