Great Plains 3N-4020 Operator Manual - Manual (Page 92)

88 3N-4010F/3N-4010HDF/3N-4020F Table of Contents Index Great Plains Manufacturing, Inc.
196-359M Table of Contents Index 2013-10-29
20 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.
20 Series Keeton Adjustment
The optional Keeton Seed Firmer is an engineered poly-
mer 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 108
The Firmer is provided with a preset tension which is rec-
ommended 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
in. If not,
loosen the bolts in the mounting bracket and select differ-
ent holes until the proper measurement is attained.
20 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 condi-
tions the wheels may accumulate soil. To avoid problems
associated with this, you can lock-up the firmers.
Refer to Figure 109
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 135: 20 Series:
Keeton Seed Firmer
20327
➂
Figure 136: 20 Series:
Seed-Lok™ Lock-Up
27463
1
2
3
1
2
3