Great Plains YP4025F-1670 Material Rate - Manual (Page 50)

48 YP30/4010HDP/20P/25 Contents Metric Rates Great Plains Manufacturing, Inc.
401-571B Contents Metric Rates 2014-03-13
Strainer
Refer to Figure 14
A Banjo brand strainer is supplied with the ground drive
fertilizer pump. It is plumbed before the Hypro pump. The
standard 80 mesh screen
should be suitable for most
applications. Other screen sizes are available from Banjo
Corporation.
Wear protective gloves when changing screens.
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 15
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.
Figure 14
Strainer
18418
1
1
Figure 15
Pressure Relief Valve
28029
3
4
5
2
2
3 4
5
2