Hardi COMMANDER 5500, Instruction Book

Page: 68 / 170

4 - Sprayer Setup
66
Spray Tips
Bare ground/low vegetation: Low air speed and angling backwards will often be the best setting to avoid reflection of spray
liquid.
Dense crop: The angling feature is ideal to help opening the crop rows and improve penetration. If you follow the crop
movement as you are varying the angling, you will find that at certain settings the crop will open more for penetration.
If wind speed, wind direction or forward speed changes during spraying, the optimal angling is likely to change too. Be
aware that with certain combinations of air speed and angling, you can “close” or flatten the crop and make penetration
impossible. Follow the crop movement intensively, especially when setting the air assistance and keep an eye on the crop
all through the application.
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It is most important that the operator is familiar with the above rules of thumb before using the TWIN sprayer.
•
The volume rate can generally be reduced to half of what is applied with a sprayer without air assistance, however with
a minimum of 54-64 GPA (50-60 l/ha) at 4-5 mph (7-8 km/h). Exceptions are, of course, liquid fertilizer and herbicides,
whose selectivity is based on large droplets that will only stick to the weeds.
•
Low drift nozzles can also be fitted on a TWIN sprayer to help reduce drift even further.
•
If there is a detailed spraying instruction on the chemical label regarding drop size, spray pressure, spray volume rate
etc., this instruction should be followed.
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ATTENTION! Often it will be necessary to drive with two different anglings, so that the angling is changed when
changing driving direction after turning at the headland.
These settings can be saved and preset on the Setbox in the tractor. For more details on how to do this, see “Operating
the Control Unit While Spraying” on page 72.
The presets can be turned on/off on the grip in the tractor while spraying; see “Operating the Grip” on page 70.