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5 - Operation
Cleaning
General info
In order to derive full benefit from the sprayer for many years the following service and maintenance program should be
followed.
ATTENTION! Always read the individual paragraphs. Read instructions for service/maintenance jobs carefully before
starting on the job. If any portion remains unclear or requires facilities which are not available, then for safety rea-
sons please leave the job to your HARDI dealer's workshop.
ATTENTION!
Clean sprayers are safe sprayers.
Clean sprayers are ready for action.
Clean sprayers cannot be damaged by pesticides and their solvents.
Guidelines
1. Read the whole chemical label. Take note of any particular instructions regarding recommended protective clothing,
deactivating agents, etc. Read the detergent and deactivating agent labels. If cleaning procedures are given, follow them
closely.
2. Be familiar with local legislation regarding disposal of pesticides washings, mandatory decontamination methods, etc.
Contact the appropriate department, e.g. Dept. of Agriculture.
3. Pesticide washings can usually be sprayed out on a soakaway. This is an area of ground that is not used for cropping.
You must avoid seepage or runoff of residue into streams, water courses, ditches, wells, springs, etc. The washings from
the cleaning area must not enter sewers. Drainage must lead to an approved soakaway.
4. Cleaning starts with the calibration, as a well calibrated sprayer will ensure the minimal amount of remaining spray liq-
uid.
5. It is good practice to clean the sprayer immediately after use and thereby rendering the sprayer safe and ready for the
next pesticide application. This also prolongs the life of the components.
6. It is sometimes necessary to leave spray liquid in the tank for short periods, e.g. overnight, or until the weather beco-
mes suitable for spraying again. Unauthorised persons and animals must not have access to the sprayer under these circ-
umstances.
7. If the product applied is corrosive, it is recommended to coat all metal parts of the sprayer before and after use with a
suitable rust inhibitor.
Cleaning and maintenance of filters
Clean filters ensure:
• Sprayer components such as valves, diaphragms and operating unit are not hindered or damaged during operation.
• Nozzle blockages do not occur whilst spraying.
• Long life of the pump. A blocked suction filter will result in pump cavitation. The main filter protecting sprayer compo-
nents is the suction filter. Check it regularly.
5.12
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