GREAT PLAINS Yield-Pro 3PYP, Руководство оператора

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2018-07-24 Table of Contents Index 401-312M
3PYP Table of Contents Index Adjustments 60
Fertilizer Orifice Plates
Refer to Figure 63
To install, insert the plate inside the gasket supplied
with the nozzle . Insert the gasketed plate with the
legend side facing out the nozzle outlet (typically up).
In general, the orifice needs to be small enough to
create enough pressure in the manifold to operate the
check valves
in the boom clamps, but not so much that
the system dumps product at the boom relief valve.
The recommend operating pressure is: 15 to 40 psi
Using an orifice size too large can result in unequal flow
at rows, intermittent flow, and flow stoppage at rows
where pressure falls below the 8 psi required to open the
clamp check valve. Using a size too small can cause
excess back-pressure resulting in material dumping at
the boom relief valve.
Use the same size at all active rows.
Alternate orifice plates are listed under “ Fertilizer
Orifice Plates ” on page 120.
The Seed Rate Chart book for this planter (manual part
number 401-312B) contains a table of orifice sizes in
gallons per acre.
Fertilizer Row Shut-Off
Refer to Figure 63
Unused drop lines may be shut off by replacing the
nozzle
with a Great Plains 832-042C cap . Twin row
boom systems separately include caps for half the rows.
When installing a cap:
•
It is not necessary to remove the gasketed orifice
plate from inside the clamp. The cap includes its own
gasket that seals at the end of the clamp port.
•
Use a tie wrap or other line to secure the loose
nozzle and drop line tubing to the boom.
•
Adjust pump and/or orifice plates for new rate and
row spacing.
Material Loss Risk:
Do not apply materials without first reviewing setup. Shutting
off rows does not change the application rate. Unless the pump
is reset, it operates at the prior rate, doubling the flow at each
nozzle. This can result in excess pressure, and material loss at
the relief valve.
Exception:
If one or two outside “zone coulter” applicators
re-trace the same furrow on opposing passes, you
can halve the rate at these rows (only) by using a
smaller orifice plate (see table at right)

Replacement nozzles include gaskets.
Gaskets may also be ordered separately as Great
Plains part number CP18999-EPR.
Agricultural Chemical Hazard:
Wear protective gloves when changing orifice plates and
strainer screens. Consult material manufacturer or supplier
documents for proper handling and steps to take if skin contact
occurs.
Figure 63
Fertilizer Orifice Plate
29984
Orifice Part Port Port
S ize Number Diameter Area
20 83 2-052C 0.020 in 0.20 mm²
2 8* 83 2-056C 0.02 8 in 0.40 mm²
3 4 * 83 2-05 3 C 0.0 3 4 in 0.59 mm²
4 8* 83 2-054C 0.04 8 in 1.17 mm²
59 83 2-057C 0.059 in 1.76 mm²
8 0 83 2-055C 0.0 8 0 in 3 .24 mm²
9 8 83 2-059C 0.09 8 in 4. 8 7 mm²
2999 3 * S ize s s t a nd a rd in m a ny fertilizer bu ndle s .
Check yo u r a cce ss orie s b efore ordering.
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