Great Plains YP825AR Operator Manual - Manual (Page 58)

54 YP825AR Table of Contents Index Great Plains Manufacturing, Inc.
401-923M Table of Contents Index 2014-06-17
Setting Material Rates
Full details (and charts) for seed and fertilizer rate setting
are found in the Seed Rate Manual (pub. number
401-923B). The following is an overview.
Planting Rate
Rate adjustment method depends on the meter drive
type.
Rate is also dependent on the cell count of the seed disk
installed. The disk must be appropriate for the crop.
There may be a choice of cell counts, corresponding to a
High or Low rate.
Correct and consistent seeding rate further requires:
• monitor setup,
• speed calibration,
• adjustment of meter pressurization and
• setting the seed inlet shutter at each meter.
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.
Planting Rate: Ground Drive
Ground drive rate is set and adjusted by Range and
Transmission sprockets. Sprocket pairings are given by
tables in the Seed Rate Manual. There are no
adjustments at the ground drive assembly.
The seed monitor reports the resulting field rate for most
seed types. For very small seeds, the monitor acts as a
blockage detector.
Planting Rate: Hydraulic Drive
Hydraulic drive rate is set and adjusted by the seed
monitor
a
, which controls a hydraulic motor on the planter.
The seed monitor also reports field rate (or blockage, in
the case of very small seeds).
Dry Fertilizer Rate
The dry fertilizer system is driven by the main ground
drive. Changes in seed rate do not affect fertilizer rate. If
the planter has hydraulic drive, the dry fertilizer system
has a dedicated ground drive.
Dry fertilizer rate is set and adjusted by a driving/driven
sprocket pair. Sprocket pairings are given by tables in the
Seed Rate Manual. Sprocket pairings are the same for
both the shared or dedicated ground drive.
On single-row planters, augers in the hoppers must also
be set, per the charts, to correspond to whether the
general rate is Low or High.
The seed monitor does not report dry fertilizer rate or
blockage.
Liquid Fertilizer Rate
The liquid fertilizer system is driven by a dedicated
ground drive. Application rate is set by a Range sprocket
pairing, and pump adjuster scale.
Consistent application requires installation of specific
size orifice plates at each row unit drop line. The planter
includes plate sets in three commonly used sizes.
The seed monitor does not report liquid fertilizer rate.
a. The seed monitor must be CANbus-compatible, such as a DICKEY-john ® IntelliAg ® , to perform this function.
The DICKEY-john ® PM300 monitor cannot control a hydraulic drive.