Great Plains 3PYP Operator Manual - Manual (Page 61)

Great Plains Manufacturing, Inc. Table of Contents Index Adjustments 57
2014-09-09 Table of Contents Index 401-312M
Fertilizer Setup
Agricultural Chemical Hazard:
Some chemicals will cause serious burns, lung damage, and
death. Avoid contact with skin or eyes. Wear proper protective
equipment as required by chemical manufacturer. Avoid
prolonged breathing of chemical fumes. Wear respirator as
required by chemical manufacturer. Seek medical assistance
immediately if accident occurs. Know what to do in case of
accident.
A fertilizer distribution system is optional on the 3PYP.
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
(Refer to Figure 60 on page 59)
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 58.
3. Relief valve setting
See “Fertilizer Relief Valve” on page 59
4. Pump drive rate
This is a separately provisioned tractor-mounted
capability. Rate setting is described in this manual,
but system operation is not.
5. Row orifice setup
See “Fertilizer Orifice Plates” on page 58
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
these 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 normally supplied with the fertilizer pump
option and is plumbed between the tank(s) and the
pump.
The strainer will 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 3PYP are size 48.
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 so often, 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.