Great Plains PD8070 Operator Manual - Manual (Page 59)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 55
2014-07-23 Table of Contents Index 401-479M
Seed Firmer Adjustments
Sharp Object Hazard:
Row unit disk blades may be sharp. Use caution when making
adjustments in this area. To adjust the Keeton
®
Seed Firmer,
lower the planter until the disks of the row units are resting on
the ground.
Keeton
®
Seed Firmer Adjustment
The optional Keeton
®
seed firmer is an engineered
polymer shape that slides down the seed furrow. It traps
seeds as they exit the seed tube and firms them into the
bottom of the “V”.
Refer to Figure 60
The firmer is provided with a preset tension which is
recommended for using the first year. The tension
screw
can 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 10.1 to 11.4 cm
(4 to 4
1 ⁄
2
in). If not, loosen the bolts in the mounting
bracket and select different holes until the proper
measurement is attained.
Press Wheel Adjustments
Double-V Press Wheels
The dual (“double V”) 1
×12 press wheel assembly is one
of three available press wheels for the PD8070. See
page 96 for ordering information.
The press wheels close the furrow which gently presses
the soil over the seed to ensure good seed-to-soil
contact for even emergence.
To provide consistent seed firming, the press wheels are
free to move downward from their normal operating
position. This system maintains pressing action even if
the row unit arm is lifted when the disks encounter
obstructions.
Refer to Figure 61, 62 and 64
There are three adjustments available on the press
wheel assembly:
1. Down pressure (shown at minimum)
2. Wheel stagger (shown staggered)
3. Centering (see Figure 64 on page 57)
Figure 60
Keeton
®
Seed Firmer
20327
3
3
Figure 61
Dual Press Wheel Adjustments
17888
1
3