Great Plains NP3000A Operator Manual - Manual (Page 123)

Great Plains Manufacturing, Inc. Table of Contents Index Maintenance and Lubrication 119
2014-04-22 Table of Contents Index 407-613M
Liquid Fertilizer Strainer Maintenance
Refer to Figure 74
The fertilizer system uses an in-line strainer to keep
damaging particulates out of the pump. The strainer
becomes clogged over time, reducing pump rate. Plan to
clean the strainer several times per season. Don’t wait
for application rates to fall below target. Higher quality
liquid fertilizers may require less frequent cleaning.
Disassemble and clean the strainer prior to storage to
prevent caking.
In Season Filter Cleaning
1.
Shut off the ball valve at the filter, to minimize
product spill.
2. Unscrew and remove the bottom canister of the filter.
3. Wash the filter cartridge with water, or replace with
new cartridge if necessary.
4. Reinstall the cartridge, canister, and turn on the ball
valve.
End of Season Filter Cleaning
1.
Load 10 to 15 gallons (40 to 60 liters) of clean water
in each supply tank.
2. Pump most of it through the system. If doing this by
hand-turning the ground drive wheel, first install the
largest drop-line orifice size, and set the pump
adjuster to maximum, to increase flow.
3. With valves open, remove the canister. Clean
strainer and canister.
4. Drain lines. Remove boom end-caps to drain wings.
5. Re-install strainer and canister.
6. Add 2 pints (1 liter) of RV antifreeze to the tank.
Pump until tank is just empty (which leaves some
fluid in strainer).
7. Open supply line at pump inlet. Introduce
RV antifreeze, and operate pump until pump is filled.
Figure 74
Strainer
18418