Adjustments, Planting depth – Great Plains CTA4000 HD Operator Manual User Manual
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160-037M
2012-11-28
38
CTA4000HD
Great Plains Manufacturing, Inc.
Adjustments
To get full performance from your implement, you need
an understanding of all component operations, and many
provide adjustments for optimal field results.
The CTA4000HD has double-disk openers with
depth-controlling press wheels mounted on floating
opener frames. This system provides accurate depth
control and seed placement over uneven terrain. The
following is an introduction to the basic seeding
components and how they work.
Each opener is mounted on a floating opener frame.
Opener bodies are staggered for easy soil flow. All
openers pivot on a common axis to maintain consistent
depth as the opener frames follow contours. A spring
provides the down pressure necessary for opener double
disks to open a seed furrow. The spring allows openers
to float down into depressions and up over obstructions.
Individual openers can be adjusted to account for tire
tracks.
Even if your planting conditions rarely change, some of
these adjustment items need periodic attention due to
normal wear.
Planting Depth
Setting nominal planting depth, and achieving it
consistently, is affected by multiple adjustable implement
functions, from greatest to least effect they are:
• Opener Depth (Press Wheel Height)
• Row Unit Down Pressure (Spring),
• Frame Weight (at higher pressures), and;
• Disk Blade Adjustments (as blades wear).
Adjustment
Page
The Adjustment Affects
Section-to-section planting consistency
Implement Lift Switch Adjustment
Avoiding wasted and unplanted seed
Consistent seeding depth
Level row unit running in desired pressure range
Achieving higher down-force settings
Equal seeding depth under wings and center section
Seeding depth in tire tracks
Row Unit Down Pressure (Spring)
Level row units and consistent seeding depth in tire tracks
Consistent seeding depth
Consistent seed placement and coverage
Opener Depth (Press Wheel Height)
Seeding depth
Fan Speed
a. See air cart Operator’s Manual for complete fan information.
Consistent seed population and minimum seed damage