Operational Problems - Hardi Boss Series Instruction Book

Operational problems

In cases where breakdowns have occurred the same factors always
seem to come into play:
• Minor leaks on the suction side of the pump will reduce the pump
capacity or stop the suction completely.
• A clogged suction filter will hinder or prevent suction so that the
pump does not operate satisfactorily.
• Clogged up pressure filters will result in increasing pressure at the
pressure gauge but lower pressure at the nozzles.
• Foreign bodies stuck in the pump valves with the result that these
cannot close tightly against the valve seat. This reduces pump
efficiency.
• Poorly reassembled pumps, especially diaphragm covers will allow
the pump to suck air resulting in reduced or no capacity.
1. That suction, pressure and nozzle filters are clean.
2. Hoses for leaks and cracks, paying particular attention to suction
hoses.
3. Gaskets and O-rings are present and in good condition.
4. Pressure gauge is in good working order. Correct dosage depends
on it.
5. Operating unit functions properly. Use clean water to check.
Fault
Liquid system
No spray from
boom when
turned on.
22
Therefore ALWAYS check
Probable cause
Air leak on suction.
Air in system.
Suction/pressure
filters clogged.
Control / remedy
Check if red suction lid/O-ring are
sealing.
Check suction tube and fittings.
Check tightness of pump diaphragm
and valve covers.
Fill suction hose with water for initial
prime.
Clean filters.
Check yellow suction pipe is not
obstructed or placed too near the
tank bottom (only 800 l tank).