Repair; Operational Problems; General Info - Hardi ALPHA EVO II EcoDrive Instruction Book

Operational problems

General Info

Operational incidents are often due to the same reasons:
• A suction leakage reduces the pump pressure and may interrupt suction completely.
• A clogged suction filter may damage suction or interrupt and prevent the pump from running normally.
• A clogged pressure filter increases pressure in the fluid system in front of the pressure filter. This may blow the safety
valve.
• Clogged in-line filters or nozzle filters increase pressure in the pressure gauge, but it decreases pressure at the nozzles.
• Impurities sucked in by the pump may prevent the valves from closing correctly, thus reducing the pump flow.
• A bad reassembly of the pump elements, especially the diaphragm covers, causes air intakes or leaks and reduces the
pump flow.
• Rusted or dirty hydraulic components cause bad connections and early wears.
• A poorly charged or faulty battery causes failure and misbehaviour in the electrical system.
Therefore ALWAYS check that
• Suction and pressure filters, as well as nozzles, are clean.
• Hoses are free of leaks and cracks, especially suction hoses.
• Gaskets and O-rings are present and in good condition.
• Pressure gauges are in good working order. Dosage accuracy depends on it.
• Operating unit functions properly. Use clean water to check.
• Hydraulic components are clean.
• The battery and its connectors are in good condition.

7 - Repair

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