21
HARDI NAVIGATOR
Technical residue
Inevitably a quantity of spray liquid will remain in the
system (which cannot be sprayed properly on the crop)
as the pump takes in air when the tank is about to be empty.
This technical residue is defined as the remaining
liquid quantity in the system as the first clear pressure
drop on the pressure gauge is read.
Approximate residue in 5000 Litre NAVIGATOR is
*50 Litres when using Agitation.
*Variations due to different ground inclinations etc.
It is recommended that, before cleaning the sprayer, the
dilutable residue be diluted 10 times with clean water
and sprayed onto the crop just sprayed as follows.
TO EMPTY THE TANK AS MUCH AS POSSIBLE
AND REDUCE THE AMOUNT OF CHEMICAL
RETAINED IN THE SYSTEM:
For the last stages of spraying, turn the SELECT FUNCTION
handle towards SPRAY NO AGITATION (Fig 49).
1 Turn SELECT FUNCTION to
SPRAY NO AGITATION,
and SELECT SOURCE
to MAI
N TANK (Fig49).
Spray until air comes out of all nozzles.
2 IMPORTANT! Ensure EVC is turned off.
3 Turn SELECT FUNCTION towards TANK
FLUSH,
and SELECT SOURCE towards FLUSH TANK.
4 Engage and set the pump at approximately 300 rpm.
5 When main tank water volume is approximately 10
times the spray liquid residue, turn SELECT SOURCE
to MAIN TANK. Operate all valves, except Filling, so
all hoses and components are flushed.
6 Turn the SELECT FUNCTION valve handle towards
SPRAY WITH AGITATION.
Spray the liquid into the field you have just sprayed.
NOTE! It is advisable to increase forward speed
(double if possible) and reduce pressure, eg using
F-80 nozzles pressure may be reduced to1.5 bar.
For the last stages of spraying, return the SELECT
FUNCTION handle to SPRAY NO AGITATION.
7 Repeat points 3 - 6 until the flush tank is empty.
DRAINING TANKS
Main tank drain valve
Pull the string at the left hand side of the tank to open
the drain valve. The valve is spring-loaded but can be
kept open by pulling the string out and upwards in the V-
shaped slit.
To release and close the drain valve again, pull the
string downwards and the valve will close automatically.
Fig 50
Flush tank
To avoid algae developing in the flush tank always drain
the flush tank when the sprayer is not in use for a long
period.
Foam marker tank
If the sprayer is to stand a few days it is recommended
to drain and flush the foam marker tank, to avoid mixed
foam from becoming inactive, as once mixed, foam
deteriorates rapidly.
VERY IMPORTANT! Although your
sprayer system has been flushed and
drained at this stage, it is essential to
follow up by thoroughly cleaning and
decontaminating the entire sprayer, all
accessories and chemical handling
equipment before spraying with an-
other chemical or storing the sprayer.
DISPOSAL OF UNUSED AND RESIDUAL
SPRAY SOLUTION AFTER COMPLETION
OF
SPRAYING:
Fig 49
WARNING! The flush nozzle cannot always
guarantee a 100% cleaning of the tank. It is
recommended to clean manually with a brush or
high pressure cleaner, and follow up with the
decontamination / rinsing procedures on the
following pages, especially if crops sensitive to the
chemical just sprayed are going to be sprayed
afterwards.
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