1. check whether the vacuum piping and joints loose.
2. Add lubrication to bearing body oil, observe oil level should be at the center line of the oil, the oil should be replaced or supplemented.
3. remove the water pump pump body plug, pouring water or slurry.
4. close the outlet gate valve of the road tables and import and export pressure vacuum gauge.
5. switch on the motor, when the vacuum pump is normal operation, open the outlet pressure gauge and imports vacuum, depending on their showing adequate pressure, gradually opening Valve, check the motor load.
6. controlling pump flow and head as far as possible within the range indicated on the plate, ensure pump functioning at maximum efficiency for maximum energy savings.