GREAT PLAINS Yield-Pro 3PYPA, Руководство оператора

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Great Plains | 401-647M | 2019-06-11 Table of Contents Index 44
3PYPA Table of Contents Index Operating Instructions
A fertilizer distribution system is optional on the planter.
The Great Plains provisioned components include:
•
the lines to the row units (connected to Keeton
®
seed firmers if present),
•
orifice fittings for each row
•
distribution lines
•
manifold
•
pressure gauge
•
relief valve
•
inlet (1 inch female NPT) from pump system on
tractor
If installed, there are five points of fertilizer setup and/or
adjustment:
1. Pump drive connection and valves
These are separately provisioned tractor-mounted
components, and are not described in this manual.
2. Strainer setup
This is a separately provisioned tractor-mounted
component, but the mesh screen size must be
compatible with the orifice plates in the distribution
system. See this page and “ Fertilizer Orifice
Plates ” on page 68.
3. Relief valve setting
See “ Fertilizer Row Shut-Off ” on page 69.
4. Pump drive rate
This is a separately provisioned tractor-mounted
capability. Rate setting is described in the 401-647B
Rate Manual, but system operation is not.
5. Row orifice setup
See “ Fertilizer Rate ” in the 401-647B Rate Manual.
Great Plains recommends checking with your local
agronomist, as soil conditions vary. Soil conditions in
your area may need less or more fertilizer than
represented in the charts. Do not exceed 12 gallons per
acre in any case.
The liquid fertilizer system is designed to operate
(ideally) between 15 and 40 psi, but in no case more
than 85 psi. Several system elements affect system
pressure, and need initial setup, periodic maintenance,
and adjustment when changing seed rates.
Liquid Fertilizer Strainer
A strainer is commonly supplied with a fertilizer pump
option and is plumbed between the tank(s) and the
pump.
The strainer may have been delivered with a mesh
screen. You need to check that it is an appropriate size
for the orifice plates you plan to use.
The standard orifice plates for the planter are size 48.
Sizes 34 and 28 are also provided.
If changing screen sizes, keep in mind the following:
•
Generally, select a mesh screen the same or slightly
smaller than the orifice size.
•
A substantially smaller mesh (e.g. 100) will reduce
manifold orifice plates plugging, but the strainer
screen will have to be cleaned more often.
•
A much larger mesh (e.g. 50 or 30) will pass more
material but should only be considered when using
large manifold orifice plates.
•
A plugged or partially plugged screen will starve the
pump and will result in a reduced application rate.