Technical Residue; Using The Drain Valve - Hardi Navigator 3100 Operator's Manual

B. Flushing when main tank is not empty
Flushing the pump, operating unit, spray lines, etc. in case of interruption in spraying before main tank is empty (e.g. because
of rain, etc.).
Cleaning of the liquid system:
1. Turn suction valve to
2. Close Agitation valve (no agitation) and turn CycloneFilter return valve to position A (marked with 1 dot) to prevent
return flow from diluting main tank contents.
3. Engage and set the pump to approximately 300 or 560 r.p.m. (depending on pump type). Increase the spraying
pressure to 85 psi (6 bar). Spray the water from the rinse tank into the field until all nozzle tubes/nozzles have been
flushed with clean water.
4. Disengage the pump.
ATTENTION! It is advisable to increase the forward speed (double, if possible) and reduce the spraying pressure to
20 psi (1.5 bar), when spraying diluted remaining liquid in the field just sprayed.

Technical Residue

An amount of spray liquid will inevitably remain in the system. It cannot be sprayed properly on the crop, as the pump takes
in air when the tank is just about empty.
This technical residue is defined as the remaining amount of liquid in the system when the first clear pressure drop appears
on the pressure gauge.
The residues in the tank should be diluted immediately in a ratio of 1:10 with clean water and then sprayed on the crop just
sprayed with increased driving speed. It is to be noted, however, that the liquid in the spray lines (with original
concentration) will be sprayed out first. Therefore, there should be an untreated patch available to spray this onto. In
addition, the rinse tank is to be used to separately rinse pump, linkage and armature.

Using the Drain Valve

The drain valve is operated from the platform just beside the main tank
lid.
1. Pull the string to open the drain valve.
2. The valve is spring-loaded, but can be kept open by pulling the
string upwards in the V-shaped slit.
3. To release, pull the string downward and the valve will close
automatically.
. (Keep pressure SmartValve in -position).
5 - Operation
63