43HARDI
®
New NAVIGATOR OPERATOR’S MANUAL
Operational problems
In cases where breakdowns have occurred, the same factors always seem to be in question:
1. Minor leaks on the suction side of the pump will reduce the pump capacity or stop the suction completely.
2. A clogged suction fi lter will hinder or prevent suction so that the pump does not operate satisfactorily.
3. Clogged up pressure fi lters will result in increasing pressure at the pressure gauge but lower pressure at the
nozzles.
4. Foreign bodies stuck in the pump valves with the result that these cannot close tightly against the valve seat.
This reduces pump effi ciency.
5. Poorly reassembled pumps, especially diaphragm covers, will allow the pump to suck air resulting in reduced or
no capacity.
6. Hydraulic components that are contaminated with dirt result in rapid wear to the hydraulic system.
Therefore ALWAYS check:
1. Suction, pressure and nozzle fi lters 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 works properly. Use clean water to check.
6. Hydraulic components are maintained clean.
Troubleshooting
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