Great Plains PT8030 V1012 Operator Manual - Manual (Page 27)

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Section 4 Adjustments
PT6030 and PT8030 Pull-Type Planter 401-032M 10/10/12
Great Plains Mfg., Inc.
the other spring end on the hex bar support. Reinstall
the spring rod and snap ring on each side.
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
Refer to Figure 4-5:
* Force when arms are parallel.
Adjustment Bar
Figure 4-5
12137
Row Unit Mounted Coulter Adjustment
The optional coulter allows the planter to penetrate tough
ground conditions. It is recommended that either the me-
dium duty or heavy duty spring package be used with this
coulter.
Coulter Adjustments
Refer to Figure 4-7:
1.
To adjust the coulter vertically, loosen the 3/4" jam nut
(#1) and the 3/4" x 3" long hex bolt (#2).
2. By turning the cam hex (#3), rotate the cam casting to
set the desired height. For wavy coulter blades, it is
recommended that the coulter blade should be run
even to 1" below the disks on the row unit.
3. Tighten the bolt and jam nut. Refer to Torque Values
Chart in “Section 10 Appendix” on page
62.
Coulter Adjustment
Figure 4-7
15053
1 x 12 Closing Wheel Adjustments
The 1 X 12 closing wheel option can be adjusted for down
force, alignment, and offset.
Closing Wheel Down Force Adjustment
Adjust the closing wheel down force to permit proper clos-
ing of the seed trench. It is recommended to start with the
T-handle in the first of 4 notches, see Figure 4-8.
If the seed trench is not closing move the handle to the
next notch back and try again. Keep moving the handle
back until the seed trench is closing, by doing this elimi-
nates unnecessary down force and compaction. In some
field conditions, the T-handle can be left in the forward slot
to minimize down force.
Closing Wheel Adjuster
Figure 4-8
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