Great Plains YP4425A Material Rate - Manual (Page 55)

Great Plains Manufacturing, Inc. Table of Contents Fertilizer Rate 51
2014-05-13 Table of Contents 401-627B
Strainer
Refer to Figure 30
A Banjo brand strainer is supplied with the ground drive
fertilizer pump. It is plumbed before the CDS-John Blue
pump. The standard 80 mesh screen
should be
suitable for most applications. Other screen sizes are
available from Banjo Corporation.
If changing screen sizes, keep in mind the following.
• A smaller mesh (100) will keep very small manifold
orifice plates from plugging so often. However, the
screen will have to be cleaned more often.
• A larger mesh (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 resulting in a reduced application rate.
• Mesh sizes: (Smallest) 100, 80, 50, 30 (Largest)
Setting Relief Valve
A relief valve is plumbed after the pump outlet to protect
the manifold and pump from excessive pressure. Any
product that dumps over the relief valve will discharge
from the dump line
.
To set relief valve:
Refer to Figure 31
1.
Unlock plastic jam nut from relief valve knob .
2. Unscrew knob clockwise until it loses contact with
internal spring.
3. Screw knob counterclockwise two turns. Start at this
setting.
4. Observe manifold gauge . Watch for relief valve
discharge while operating in the field.
5. If valve is dumping product and gauge reads under
65 psi, stop tractor and turn knob clockwise (looking
down)
1 ⁄
4
turn. Continue operating at normal field
speed. Repeat this step as needed until no product
is discharged from relief valve.
6. If pressure gauge reads above 65 psi, change to a
larger orifice. Go to step 2. Repeat steps.
Ground Drive Fertilizer Rate
One or two CDS-John Blue ground drive pumps
customarily supply a Type 2 boom on the planter.
JohnBlue Pump Rate
Refer to Figure 32 and Figure 33
One piston pump
generally suffices for “starter”
application rates. Two piston pumps may be required for
higher rates on YP40A.
Figure 30
Strainer
18418
1
1
Figure 31
Pressure Relief Valve
28029
3
4
5
2
2
3 4
5
2
Material Loss/Equipment Damage Risks:
Operate only with material loaded, or disconnect chain or
remove sprocket if not intending to apply material. Contact
wheel and chain system operate whenever the planter is
lowered and in motion. If planting without fertilizing, the pump
must not be allowed to run dry.
1