Great Plains CTA4000 HD Operator Manual - Manual (Page 42)

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)
• Sub-Frame Down-Force,
• Row Unit Down Pressure (Spring),
• Opener Height,
• Opener-Subframe Adjustment,
• Frame Weight (at higher pressures), and;
• Disk Blade Adjustments (as blades wear).
Adjustment Page The Adjustment Affects
Frame Level 39 Section-to-section planting consistency
Implement Lift Switch Adjustment 39 Avoiding wasted and unplanted seed
Sub-Frame Down-Force 43 Consistent seeding depth
Opener-Subframe Adjustment 45 Level row unit running in desired pressure range
Frame Weight 41 Achieving higher down-force settings
Adjusting Weight Transfer 42 Equal seeding depth under wings and center section
Row Unit Adjustments 46
Opener Height 47 Seeding depth in tire tracks
Row Unit Down Pressure (Spring) 47 Level row units and consistent seeding depth in tire tracks
Disk Blade Adjustments 48 Consistent seeding depth
Seed Firmer Adjustments 49 Consistent seed placement and coverage
Opener Depth (Press Wheel Height) 50 Seeding depth
Fan Speed 35
a
a. See air cart Operator’s Manual for complete fan information.
Consistent seed population and minimum seed damage