How to extend the life of submersible sewage pump?

In order to ensure the normal use of submersible sewage pump and life expectancy, Wei Shanghai Pump remind you should carry out regular inspection and maintenance, as follows:
1, the replacement of seal rings: long-term use in the sewage medium, the impeller and the gap between the seal ring may increase, resulting in reduced pump flow and efficiency, should turn off the gate, the pump lift, remove the bottom cover, remove Seal ring, according to the actual size of impeller ring with seal ring, the gap is generally about 0.5mm.
2, long-term submersible sewage pump when not in use, should be cleaned and suspended in a ventilated and dry place, pay attention to antifreeze. If placed in water, every 15 days at least run 30min (not dry), to check its function and adaptability.
3, the cable at least once a year, if damaged, please give replacement.
4, at least once a year to check the motor insulation and fastening screws, if the motor insulation drop, please find someone to repair, if the fastening screw loose, please re-fastening.
5, submersible sewage pump has been injected into the factory before the amount of oil used to lubricate mechanical seals, the oil should be checked once a year. If there is water in the oil, should be let go, replace the oil, replace the gasket, tighten the plug. After three weeks, to be re-examined, if the oil into the emulsion, the mechanical seal should be checked, if necessary, should be replaced.
6, submersible sewage pump operation failure, please give the troubleshooting method, if still can not be resolved, and can not determine the reason, do not chaos chaos chaos repair, should immediately find someone to repair