2018-07-23
401-652M
YP-425, 625, 825, & 1025-A3P
Adjustments
48
5. Rate: Seed Inlet Shutter
A consistent seed results from having a consistent
number of seeds (usually one) in each pocket of the
seed disk, avoiding “skips” (fewer seeds per pocket) and
“doubles” (excess seed per pocket).
One of the factors that affects seed pickup at the disk is
having an optimal seed pool (page 63). The depth of the
seed pool is controlled by the seed inlet shutter
.
Each Seed Rate chart specifies a suggested initial
shutter setting. See “
page 62 for setting details, and further adjustment.
At unused rows, set the shutter to zero/closed to prevent
loss of meter pressurization air. Install a blank disk. See
“
6. Rate: Meter Pressurization
Refer to Figure 39
(which depicts a typical reading for some densities of
corn)
A major factor that affects seed pickup at the disk is
optimal meter pressurization. Fan air holds the seed in
the disk pockets until they pass the drop brush
(page 39).
The Seed and Fertilizer Rate manual has a section with
suggested initial meter pressures, which may be a single
value, or a graph based on seed density.
Meter pressure is set by a combination of tractor circuit
lever and fan butterfly valve (page 38). See “
7. Rate: Checking
Although the seed monitor reports a computed
population based on seeds sensed, only an actual furrow
check provides certainty about the actual seeding rate.
See the Seed and Fertilizer Rate manual.
Figure 37
Seed Inlet Shutter: Setting III
29607
5
Figure 38
Meter Pressure Gauge
29842
Содержание YP-425
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