Row unit mounted coulter, Depth adjustment, 1 x 12 closing wheel adjustments – Great Plains 80403P Operator Manual User Manual
Page 13: Down force pressure chart
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11
8/1/01
Great Plains Mfg., Inc.
Section 3 Row Unit Operation
8-Row 36", 38", 40" & 10-Row 30" 3-Point Wide Row Planter 401-020M
Reinstall the spring rod and snap ring on each side.
Row Unit Mounted Coulter
The optional coulter allows the planter to penetrate
tough ground conditions. It is recommended that either
the medium duty or heavy duty spring package be used
in conjuction 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 3-9.
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 the
Torque Value Chart in "Section 9 Specifications"
on page 28.
Depth Adjustment
The planting depth of the row unit is controlled by 2 walk-
ing gauge tires located next to the disks.
Adjust the planting depth as follows:
1.
Raise the planter to remove weight from the gauge
tires.
2.
Raise the T-handle and move it forward to decrease
the planting depth, see Figure 3-10. Moving the han-
dle rearward increases the planting 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.
Closing Wheel Down Force Adjustment
Adjust the closing wheel down force to permit proper
closing of the seed trench. It is recommended to start with
Adjustment Bar
Figure 3-8
12137
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.
Row Unit Mounted Coulter
Figure 3-9
12208
T-Handle Adjustment
Figure 3-10
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