Great Plains 3N-4025P Operator Manual - Manual (Page 117)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 113
2014-01-29 Table of Contents Index 196-538M
20P Series Seed Firmer Adjustments
20 Series row units include a seed flap, and accept one
of two optional firmers.
Sharp Object Hazard:
Row unit disk blades may be sharp. Use caution when making
adjustments. To adjust the Keeton
®
Firmer, lower the planter
until the disks of the row units are resting on the ground.
20P Series Keeton
®
Adjustment
The optional Keeton
®
Seed Firmer is an engineered
polymer shape that slides down the seed trench. It traps
seeds as they exit the seed tube and firms them into the
bottom of the furrow.
Refer to Figure 131
The Firmer is provided with a preset tension which is
recommended for using the first year. The tension screw
can
➂
be tightened in subsequent years according to
your needs. Firmers should provide just enough tension
to push seeds to the bottom of the trench.
Measure the distance from the ground to the head of the
tension screw. This distance should be 4 to 4
1 ⁄
2
inches.
If not, loosen the bolts in the mounting bracket and select
different holes until the proper measurement is attained.
20P Series Seed-Lok
®
™ Lock-Up
Optional Seed-Lok
®
™ firming wheels provide additional
seed-to-soil contact. The wheels are spring loaded and
do not require adjusting. In some wet and sticky
conditions the wheels may accumulate soil. To avoid
problems associated with this, you can lock-up the
firmers.
Refer to Figure 132
To lock up Seed-Lock wheels:
1. Raise planter. Insert lift assist cylinder locks.
2. Rotate Seed-Lok
®
™ lock-up handle 90 degrees
down on top of row unit body.
3. Push up on Seed-Lok
®
™ wheel until wheel arm
latches up.
4. To return to normal operation, turn release down.
Figure 158: 20 Series:
Keeton
®
Seed Firmer
20327
➂
Figure 159: 20 Series:
Seed-Lok
®
™ Lock-Up
27463
1
2
3
1
2
3