Cleaning The Tank And Liquid System; Cleaning And Maintenance Of Filters - Hardi NAVIGATOR 3000 Operator's Manual

5 - Operation

Cleaning the Tank and Liquid System

ATTENTION! Thorough cleaning of the sprayer is to be carried out when shifting to crops which are very sensitive to
chemicals just sprayed, or prior to storage for a longer period of time.
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NOTE! Prior to this procedure, a standard cleaning should be carried out (See "Standard Cleaning" on page 73).
• Select and use the appropriate protective clothing. Select detergent suitable for cleaning and suitable deactivating
agents if necessary.
• Rinse and clean sprayer and tractor externally. Use detergent if necessary.
1. Remove tank and suction filters and clean. Be careful not to damage the filter mesh. Replace suction filter top. Replace
all filters when the sprayer is completely clean.
2. With the pump running, rinse the inside of the tank. Do not forget to clean the tank roof. Rinse and operate all
components and any equipment that has been in contact with the chemical. Before opening the distribution valves
and spraying the liquid out, decide whether this should be done in the field or dedicated filling site.
3. After spraying the liquid out, stop the pump and fill at least 1/5 of the tank with clean water. Note that some chemicals
require the tank to be completely filled. Add appropriate detergent and/or deactivating agent, e.g. washing soda or
Triple ammonia. Special detergents for sprayer cleaning are recommended as some also lubricate ball valves, etc.
4. Start the pump and operate all controls, enabling the liquid to come into contact with all the components. Leave the
distribution valves until last. Some detergents and deactivating agents work best if they are left in the tank for a short
period. Check the label. Flush the CycloneFilter return line by engaging the lever in the bottom to flush position.
5. Drain the tank and let the pump run dry. Rinse inside of the tank, again letting the pump run dry.
6. Stop the pump. If the pesticides used have a tendency to block nozzles and filters, remove and clean them
immediately.
7. Replace all the filters and nozzles and store the sprayer. If it is noted, from previous experiences, that the solvents in the
pesticides are particularly aggressive, store the sprayer with the tank lid open.
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.
ATTENTION! If a cleaning procedure is given on the chemical label, follow it closely.
ATTENTION! If the sprayer is cleaned with a high pressure washer, lubrication of the entire machine is recommended.

Cleaning and Maintenance of Filters

Clean filters ensure:
• Sprayer components such as valves, diaphragms and operating units are not hindered or damaged during operation.
• Nozzle blockages do not occur while spraying.
• Long life of the pump. A blocked suction filter will result in pump cavitation. The main filter protecting sprayer
components is the suction filter. Check it regularly.
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