Nozzles do not close completely.

The nozzle bodies are calcified.

WARNING
Health hazard due to contact with acidification agents
Follow the instructions provided by the manufacturer.
NOTE
Commercial cleaning additives are strongly alkaline and therefore they neutralize spray agent residues such as sulphonylurea in the spray liquid tank. However, if there is calcification in the machine, they increase the pH-value and thus they are counterproductive for descaling.

Indications of calcification in the system:

  • The nozzle bodies do not open or close.

  • Error messages on the ISOBUS control terminal

Limescale must be eliminated with a special acidification agent.

  1. Clean the empty field sprayer.
  2. Pour 5,28 gal (20l) of water into the spray liquid tank via the suction connection or pressure connection.
  3. Run the spray liquid pump.
  4. Pour a suitable acidification agent into the spray liquid tank via the inspection hatch. Comply with the manufacturer's specifications for the fill quantity.
  5. Allow the mixture to circulate in the spray liquid circuit for 10 to 15 minutes.
  6. Switch off the spray liquid pump.
  7. Allow the mixture to rest for 5 minutes.
  8. Dilute the mixture with flushing water until the mixture indicates a neutral pH value by changing color.
NOTE
For the desired colour, comply with the manufacturer's specifications.

The diluted mixture is harmless and can be mixed with the spray agent for further operation.