Great Plains PT1230 AA1062 Operator Manual - Manual (Page 28)

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Section 4 Adjustments
10/10/12 PT1230 Pull-Type Folding Planter 401-069M-A
Great Plains Mfg., Inc.
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.
Raise the T-handle and move it forward to decrease the
planting depth, see Figure 4-6. Moving the handle rear-
ward increases the planting depth. Small increments of
depth adjustment can be made by walking the T-handle
from side to side.
After one row is set to the desired depth, move the T-han-
dle on the other rows to the same location. Field check
each row for desired depth and re-adjust as necessary.
Down Force Row
Standard Spring Package
The standard down force spring package, consists of 2
adjustable springs applying approximately 100-200 lbs. of
down force.
!
CAUTION!
Adjust spring pressure only with planter in raised position.
Optional Heavy Duty Spring Package
The heavy duty spring packages consist of 2 additional
springs. The heavy duty package can be adjusted from
approximately 200 to 400 lbs. of down force.
Spring Adjustments
•
All spring adjustments must be made with the planter in
the fully raised position.
T-Handle Adjustment
Figure 4-6
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IMPORTANT: The maximum down force stated be-
fore is reached when the parallel arms are all the
way up.
•
The spring package is adjustable from 90 lbs. to 325 lbs.
of down force when the parallel arms are horizontal.
Consult the Down Force Pressure Chart to obtain the
desired down force.
•
Two springs can be purchased at your Great Plains
Dealer to make the standard package into a heavy duty
package or two springs can be removed from the heavy
duty package to make a standard package. Add or sub-
tract springs by removing the cotter key at the end of the
spring pivot rod. Slide the rod inward to add or remove a
spring from each side. Then attach or remove the other
spring end on the hex bar support. Reinstall the spring
rod and snap ring on each side.
Down Force Pressure Chart
Refer to Figure 4-7:
* Force when arms are parallel.
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
IMPORTANT: To adjust the spring tension, lift the
plunger by pulling up on the roll pin handle and sliding
the handle adjustment assembly into the appropriate
hole, see Figure 4-7.
Adjustment Bar
Figure 4-7
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