Great Plains 2015 Operator Manual - Manual (Page 16)

2015 Three-Point Soybean Machine 173-088M 4/18/05 14 Great Plains Mfg., Inc.
Section 4 Adjustments
Row Unit Mounted Coulter
The optional coulter allows the drill to penetrate tough
ground conditions. It is recommended that either the me-
dium duty or heavy duty spring package be used in
conduction with this coulter.
Coulter Adjustments
1. To adjust the coulter vertically, loosen the 3/4" jam
nut and the 3/4" x 3" long hex bolt, see Figure 4-3.
2. By turning the cam hex, rotate the cam casting to set
the desired height. For wavy coulter blades, it is rec-
ommended that the coulter blade should be run
even to 1" below the disks on the row unit.
3. Tighten the bolt and jam nut to torque values in
"Section 2 Torque Value Chart" on page 6.
Depth Adjustment
The seeding depth of the row unit is controlled by 2 walk-
ing gauge wheels located next to the disks.
Adjust the planting depth as follows:
1. Raise the drill to remove weight from the gauge
wheel.
2. Raise the T-handle and move it forward to decrease
the seeding depth, see Figure 4-4. Moving the han-
dle rearward increases the seeding depth. Small in-
crements of depth adjustment can be made by
walking the T-handle from side to side.
3. After one row is set to the desired depth, move the
T-handle on the other rows to the same location.
1" x 12" Closing Wheel Adjustments
The 1" X 12" closing wheel option can be adjusted for
down force, alignment, and offset.
Adjustment Bar
Figure 4-2
Down Force Pressure Chart
To Obtain This
* Down Force
Use This # of
Springs
In This
Hole
90 lbs. 2 A
105 lbs. 2 B
125 lbs. 2 C
140 lbs. 2 D
160 lbs. 2 E
185 lbs. 4 A
215 lbs. 4 B
245 lbs. 4 C
285 lbs. 4 D
325 lbs. 4 E
* Force when arms are parallel.
12137
Row Unit Mounted Coulter
Figure 4-3
12208
T-Handle Adjustment
Figure 4-4
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