Opener adjustments, Opener depth, Down force spring adjustment – Great Plains PT8030 V1013 Operator Manual User Manual
Page 28: Row unit coulter adjustment
26
Section 3 Adjustments
10/10/12
PT6030 and PT8030 Pull-Type Planter 401-032M-A
Great Plains Mfg., Inc.
Opener Adjustments
Opener Depth
The planting depth of the row unit is controlled by two side
gauge wheels located next to the disk blades.
Adjust the planting depth as follows:
1.
Raise the planter to remove weight from the gauge
wheels.
2.
Raise the T-handle shown in Figure 3-8.
• Move handle toward the planter to decrease planting
depth.
• Move the handle away from the planter to increase
planting depth.
3.
After one row is set to the desired depth, move the T-
handle on the other rows to the same location.
Figure 3-8
T-Handle Adjustment
12345
Down Force Spring Adjustment
The standard spring package consists of non-adjustable
springs. When the parallel arms are completely horizontal,
the standard springs apply a maximum of 90 pounds of
down force.
Optional medium- and heavy-duty spring packages con-
sist of two or four adjustable springs, respectively.
To adjust down force on the optional spring packages:
1.
Make adjustments with the planter fully raised.
2.
Refer to the chart on this page to find the correct set-
ting for the desired down force.
3.
Pull up on the handle shown in Figure 3-9 and slide
the handle assembly into the appropriate hole.
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.
Figure 3-9
Adjustment Bar
12137
Row Unit Coulter Adjustment
Optional coulters that mount on the row unit are available.
These coulters allow the openers to penetrate in tough
ground conditions. Use medium- or heavy-duty spring
packages with this coulter. (Refer to Spring Packages,
“Options,” page 47.)
1.
To adjust the coulter vertically, loosen the 3/4-inch jam
nut (1) and the 3/4-by-3-inch hex bolt (2).
2.
By turning the cam hex (3), rotate the cam casting to
set the desired height. For wavy coulter blades, the
coulter blade should run even to 1 inch below the disks
on the row unit.
3.
Tighten the bolt and jam nut. Refer to Torque Values
Chart, “Appendix” on page
52.
To Obtain This
Down Force
Use This # of
Springs
In This
Hole