Great Plains PH-20 Operator Manual User Manual
Page 17
15
Section 2 Operating Instructions
12/29/2011
PH-15, PH-20, PFH-15 and PFH-20 Precision Fertilizer Hitch 148-365M
Great Plains Mfg., Inc.
b.
Close piston-pump valve shown in Figure 2-5.
Figure 2-5
Piston Pump Valve
c.
Open valves at each tank and at quick-fill coupler.
Figure 2-6
Tank and Quick-Fill Valves
d.
Fill tanks, then close valve at quick-fill coupler,
and disconnect the nurse tank hose.
Always fill fertilizer tanks to equal levels. If one
tank fills more quickly, shut that tank valve off to
raise the level in the other tank.
18051
21531
7.
Open piston-pump valve. See Figure 2-7.
Figure 2-7
Close Cleanout Valve, Open Piston Pump Valve
8.
While operating in the field, watch manifold pressure
gauge mounted above piston pump. See Figure 2-8.
Figure 2-8
Manifold Pressure Gauge
18051
18050
Note: The tank shutoff valves supplied from the factory are 3-way ball valves with the ports facing the rear of the machine
plugged. With this port plugged use the valves as standard on/off valves. The 3-way valves have been provided to make
a conversion to a dual product system easier. By removing the plugs on the rear port of the 3-way valves, and by adding
some additional plumbing and a second pump, the unit can be used in these scenarios:
a.
Both tanks hold product 1. (example starter). Both tanks are routed to the starter pump by turning the 3-way
valves forward.
b.
One tank holds product 1, the other tank product 2. Fill the tanks one at a time through the same quick fill line.
Supply two different pumps the two different products by turning on valve handle forward, and the other handle
rearwards.
c.
Both tanks hold product 2. Both tanks are routed to the second pump by turning both handles rearwards.
Always turn the long part of the handle to point the direction you want the product to flow. Setting the handle at 90 degrees
to the side ports shuts off the flow to all ports.