How to choose the right lubricant and coolant when maintaining a alternator?

Choosing the right alternator lubricant and coolant is critical, here are some key points:

Lubricant selection:

Select the appropriate grade of oil based on the type and speed of the alternator. For example, diesel alternators that are supercharged and have a calibrated speed greater than 2000 rpm should use CC grade oil; naturally aspirated and those with a calibrated speed of less than 2000 rpm use CA grade oil.

Ensure the oil is clean and prevent water from entering the oil.

When replacing different grades of engine oil, it is necessary to clean the lubrication system before injecting new oil, and different grades of engine oil should not be mixed.

Coolant selection:

Clean fresh water, such as rainwater, tap water or clarified river water, should normally be used.

If only well water or ground water (hard water) can be used, it must be softened to prevent scale from forming in the engine and affecting the cooling effect.

Methods of softening hard water include boiling and chemical treatment, such as adding 0.67 caustic soda (caustic soda) per liter of water, stirring to settle, and then using the upper layer of clear water.

Precautions:

Diesel fuel should be selected pure and with few impurities to prevent early clogging of filters and rusting of parts.

The condensation point of diesel fuel should be 16-10℃ lower than the lowest ambient temperature when the unit is used to ensure the fluidity.

The manual of the alternator set usually recommends suitable types of lubricating oil and coolant, which should be selected in strict accordance with the guidance of the manual.

Following these recommendations can help ensure efficient operation and prolong the life of the alternator. Further details and advice can be obtained by visiting the relevant websites.