Troubleshooting; Operational Problems; General Information - Hardi ZENIT 400 Original Instruction Book

7 - Troubleshooting

Operational problems

General information

In almost all breakdowns, the same factors always seem to be present:
1. Small cracks or air leaks in suction side reduce the pump's capacity or stop suction completely.
2. A blocked suction filter causes the pump not to suck properly.
3. Clogged pressure filters cause pressure to rise on the pressure gauge but to fall at the nozzles.
4. Foreign bodies in the valves can cause the valve to not close completely. This reduces the pump's performance.
5. Poorly re-assembled pumps, especially diaphragm housings, causes the pump to suck air and hence, reduces or
decreases the pump suction.
6. Hydraulic components that are contaminated with dirt result in rapid wear to the hydraulic system.
Therefore ALWAYS check that:
1. Suction, pressure and nozzle filters are clean.
2. Hoses have no leaks or cracks, especially the suction hoses.
3. Gaskets and o-rings are in good condition.
4. Pressure gauge marks the correct indication. Correct dosage depends on its accuracy.
5. Operating unit is in good working order. Use clean water to check it.
6. Hydraulic components are maintained clean.
102