3P1006NT
Operating Instructions
29
2018-06-06
151-144M
Material Rates Overview
Details of seed and fertilizer rate setting are found in the
Adjustments
section, and rely on data from the Seed
Rate Manual.
Rate setting controls are different for each box, but
independent for each box. Some boxes have more than
one control.
Basic rate settings are found in the Seed Rate Manual
(part number 151-144B, normally located in the
Manual-Pak™ enclosure at front center of drill).
All chart rates, for all boxes, are approximate.
Great Plains strongly recommends calibration of each
box to the material to be applied.
Seeding Depth Overview
Setting nominal planting depth, and achieving it
consistently, is affected by multiple adjustable drill
functions, which can interact. From greatest to least
effect they are:
Main Box
Dual Seed
Native Grass
Small Seeds
Fertilizer
Rate Range
Seed Rate Reduction
Rate Handle
Rate Knob
Coarse Rate
Drive Type
Drive Type
Fine Rate
Rate Handle
Driver/Driven
Cup Adjustment
Door Handle
Coulter Height
The coulters prepare soil ahead of the openers, and are
typically set slightly deeper than the openers. The openers
thus only need to open the tilled shaft into a V-shaped
furrow. The openers cannot generally run deeper than the
coulters, and running them too close to coulter depth may
result in uneven seed depth.
Opener Depth
(Press Wheel Height) (page 40)
Using the T-handle, in no-till conditions, opener depth can
be set near, and at any level above coulter depth.
In soft or conventionally tilled soil, the opener disc depth is
more independent of the coulters.
Row Unit Down Pressure
(Spring) (page 38)
In most conditions, the factory spring setting is sufficient to
make a consistent furrow in the coulter-prepared soil. In
extremely heavy conditions, with the coulters running at the
desired depth, the openers may be making a furrow of
inconsistent depth. Rather than increase the coulter depth,
you can increase opener down force at the row unit springs.
Disc Blade Adjustments
(as blades wear) (page 37)
As blades wear, the diameter of the discs, and their contact
gap, changes. Seeding depth will also change (or become
irregular), unless adjustments are made to blade spacing
and the T-handle setting. Generally, the blades need to be
replaced completely before coulter height adjustments
would be needed.
Never back up with openers in the ground. To do so may cause
damage or opener plugging.
Figure 17
06 Series Coulter & Row Unit
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