Seed Hawk TOOLBAR 2013 45 & XL SERIES - Manual (Page 48)

SEED HAWK® TOOLBAR OPERATOR’S MANUAL 48
5.0 LIQUID SYSTEM OPERATION
5.1 SYSTEM FLOW DESCRIPTION
The metering pump, ground driven by the metering wheel, draws liquid fertilizer first through
the flow valve, then the main filter. The liquid fertilizer is then pumped to the distribution
system. A gauge indicates the operating pressure.
Select the appropriate VR nozzle to adjust the liquid fertilizer delivery pressure. The restriction
created by the orifice sets the amount of back pressure required for even distribution of liquid
fertilizer to each opener. Too low pressure will result in poor liquid distribution and excessive
pressure can damage the pump, hoses, fittings and/or drives.
NOTE: Operating pressure cannot be used as a means of system calibration as system
pressure has no direct correlation to the quantity of product applied. Even distribution of
liquid fertilizer requires that the operating pressure be set in the recommended range.
5.2 CHECKING FERTILIZER RUNS
Perform the following test to ensure that each fertilizer run is functioning properly:
1. Ensure that tank is at least partially filled with either water or liquid fertilizer.
2. Proceed forward about 20 ‐ 30 ft (6 ‐ 9 m) running liquid system.
3. Stop tractor and look at ground behind each opener to ensure liquid fertilizer is discharged
behind each run. See www.spraytarget.com for more information.
5.3 VARIABLE RATE LIQUID CHART
NOTE: Above charts are for reference only, pressures may vary without affecting the
application rate.