Great Plains 2420F Operator Manual - Manual (Page 29)

8/14/2006
27 Adjustments
Opener Seeding Depth
Refer to Figure 24
Side depth wheels beside the opener disks con-
trol opener seeding depth. The position of an
adjustable stop determines seeding depth.
Refer to Figure 25
Set opener seeding depth by adjusting T-handles.
To adjust, first raise openers slightly, then lift and
slide T-handles on top of openers. Adjust all T-
handles to the same setting.
• For shallower seeding, slide T-handles for-
ward toward drill.
• For deeper seeding, slide T-handles back
away from drill.
Press Wheel
Refer to Figure 26
Press wheels are attached to each opener body.
The press wheels close the seed trench and gen-
tly press soil over seed.
An adjustable spring in the press-wheel mecha-
nism creates the down pressure needed to close
the seed trench. The amount of force needed will
vary with field conditions.
To adjust, move adjustment handle.
• For less down pressure, move handle forward
toward drill.
• For more down pressure, move handle back
away from drill.
NOTE: Increased press wheel spring force may
require increased opener down force to maintain
depth.
Figure 24
20 Series Opener
20451
Disk
Side Depth
Wheel
18285
Handle
Figure 26
Closing Wheel Down Pressure
16629
More down
pressure
Less down
pressure
Figure 25
20 Series Opener Depth