Great Plains YP825AR Material Rate - Manual (Page 73)

Great Plains Manufacturing, Inc. Table of Contents Metric Charts Liquid Fertilizer Rate 69
2013-11-11 Table of Contents Metric Charts 401-923B
Strainer
Refer to Figure 32
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 sizes are available from Banjo.
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 and pressure gauge is mounted:
• at front left on model YP425A, or
• at front center on model YP625A or YP825A
The relief valve protects the manifold, lines and fittings
from excessive pressure. Any product that passes the
relief valve will discharge from the dump line
in
relative safety.
To set relief valve:
1. Unlock plastic jam nut from relief valve knob.
2. Unscrew knob clockwise (looking down) until it
loses contact with internal spring.
3. Screw knob counterclockwise two turns.
Start at this setting.
4. Observe manifold gauge and watch for relief valve
dump line discharge while operating in the field.
5. If valve is dumping product and gauge reads under
65 psi, stop tractor and, looking down, turn knob
clockwise
1 ⁄
4
turn. Continue operating at normal field
speed. Repeat this step as needed until no product
is discharged from relief valve dump line
.
6. If the pressure gauge reads above 65 psi, change to
a larger orifice. Go to step 2 and repeat.
Agricultural Chemical Hazard:
Wear protective gloves when changing strainer screens.
Consult material manufacturer or supplier documents for
proper handling and steps to take if skin contact occurs.
Figure 32
Strainer
18418
1
1
2 3
4
Figure 33
Fertilizer Relief Valve
31017
2
3
4
5
6
5
6
6
3
4
6
4