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3500 / 4000 EXPLORER
SPRAY OPERATION
NOTE! A calibrated sprayer is a safe sprayer. See the
Hardi Spray Technique book supplied with your sprayer.
FLUSHING TANKS
The incorporated 280 litre flush tank can be used for
diluting and flushing.
Diluting Spray Liquid
Infield diluting of remaining spray liquid residues in the
spraying circuit, for spraying the liquid into the field
before cleaning the sprayer.
1 Empty the sprayer as much as possible. Turn the
black suction valve (A Fig 38) towards FLUSH TANK.
2 Ensure the EC operating unit is off.
3 Engage and set the pump at approximately 300 rpm.
4 When flushing water corresponding to approximately
10 times the spray liquid residue (see Technical
residue ) has been used, turn the black suction valve
(A Fig 38) to MAIN TANK. Operate all EC operating
unit valves, so all hoses and components are flushed.
5 Spray all the liquid into the field you have just sprayed.
6 Repeat points 3 - 7 until the flush tank is empty.
EMPTY
FILL
Fig 38
Flushing
To flush the pump, operating unit, spray lines, etc. in
case of a stop in spraying before the main tank is empty
(e.g. beginning to rain, etc.):
1 Turn the black suction valve (A Fig 38) to FLUSH TANK.
2 Engage the pump and spray water from the flush
tank into the field until all tubes / nozzles are flushed.
3 Disengage the pump.
WARNING! Always clean the tank manually with a
brush, especially if crops sensitive to the chemical
just sprayed are going to be sprayed afterwards.
18
D
C
B
E
A
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.
Dilutable Residue*
15 Litres
Total Residue**
41 Litres
* Residue in the main tank, possible to dilute with water from the flush
tank
** Total residue in the tank and spraying circuit on standard sprayer
Variations due to different ground inclinations, etc.
Dilutable residue must be diluted 10 times with clean
water and sprayed into the crop just sprayed, before
cleaning the sprayer - (see Cleaning P 19).
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, release it and the valve will close automatically.
Fig 39
If draining a residue (e.g. liquid fertiliser)
into a container, a 2
with hose can rapidly be connected to
the main tank drain valve, and the liquid
let safely out.
Fig 40
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
Do not store with pressure in the foam marker tank -
loosen the cap.
If the sprayer is to stand a few days it is recommended
to drain the foam marker tank to avoid mixed foam from
becoming inactive, as once mixed, foam deteriorates
rapidly.
1
/
" snap coupling
2
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