Great Plains 3N-4020 Operator Manual - Manual (Page 85)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 81
2013-10-29 Table of Contents Index 196-359M
Adjusting 10HD Disc Contact
Sharp Object Hazard:
Row unit disk blades may be sharp. Use caution when making
adjustments in this area.
Refer to Figure 107
1. Raise the drill and install the transport locks.
2. Remove the bolt retaining the opener disc on one
side. Carefully remove the disc, noting how many
spacers are outside the disk and inside the disk. Do
not lose the hub components and spacer washers.
3. To reduce the spacing between the discs (the normal
case), move one spacer washer from the inside to
the outside of the disc.
4. Re-assemble and check disc contact.
10HD Seed Firmer Adjustments
10HD Series row units include a seed flap, or one of two
optional seed firmers.
The seed flap requires no adjustment, but may need to
be replaced if worn, and may need to be shortened if an
optional seed firmer is added after initial delivery.
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 drill until the disks of the row units are resting on the
ground.
10HD 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 “V”.
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 be tightened in subsequent years according to your
needs. Firmers should provide just enough tension to
push seeds to the bottom of the trench.
Figure 121: 10HD Series
Adjusting Disk Spacers
26385
2
1
3
3
3
3
Figure 122: 10HD Series
Keeton Seed Firmer
26390
1
1