How to maintenance molten salt pump?

How to maintenance molten salt pump? 

Molten salt pump is widely used in the fine chemical industry, usually requires a long time continuous and reliable operation, often maintain should pay attention to the following aspects: 
1 check molten salt pump has no abnormal vibration or noise. 
2 to check whether the temperature of molten salt heat exchanger is normal, the molten salt is not normal. 
3 regular addition of grease, the proposal to replace once a year grease. 
4 check the Huawei molten salt pump connected bolts loose. 
5 check the cooling water pipe sleeve is smooth. 
6 check current fluctuations, if the volatility is too large, please stop to find the reasons.