Great Plains YP825A Operator Manual - Manual (Page 60)

56 YP425A, YP625A and YP825A Table of Contents Index Great Plains Manufacturing, Inc.
401-651M Table of Contents Index 2014-08-15
Liquid Fertilizer Adjustments (Option)
This section is a summary. For detailed instructions, as
well as fertilizer rate and orifice sizing charts, see the
Seed and Fertilizer Rate manual (401-651B).
Agricultural Chemical Hazards:
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.Some chemicals will cause
serious burns, lung damage, and death. Seek medical
assistance immediately if accident occurs. Know what to do in
case of accident.
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. For in-furrow application, do not exceed 12
gallons per acre in any case.
Rate is positively set by the drive system and pump.
Adjustments to orifice plates must also be made to
provide back-pressure keeping the boom within a
specific pressure range to assure consistent delivery.
Ideal manifold pressure is between 15 and 40 psi.
A check valve at each nozzle prevents flow below
approximately 8 psi, preventing boom drainage during
turns and non-planting moves. Operating at pressure too
low may cause some nozzles to close, resulting in
uneven flow row-to-row.
A relief valve at the boom inlet protects the system from
over-pressure. Above approximately 65 psi, material is
diverted to a dump line.
Figure 51
112718-01 Pump Slide Chart
29981
Figure 52
Fertilizer Transmission (SN-)
31041
Figure 53
Fertilizer Transmission (SN+)
32047