How To Maintain A Diesel Generator?

A diesel generator is a combination of a diesel engine and a generator (usually an alternator) to produce electrical energy. This is a specific case of an engine-generator. Diesel compression-ignition engines are usually designed to run on fuel oil, but some types are also suitable for other liquid fuels or natural gas.

They require less maintenance due to their durability, reliability and ruggedness characteristics, and they are considered less expensive to run due to the low cost of fuel compared to other types of fuels such as gasoline and propane.

They can withstand heavy loads for long periods of time and start powering up at full capacity within minutes and must be maintained regularly to ensure they provide quality power throughout their service life. The best generator maintenance practice is to follow the maintenance schedule provided by the generator manufacturer to ensure maximum service time and proper operation of the generator when power is needed.

Having a well-designed and well-maintained backup power system is the best protection against utility power outages. For hospitals and other health care facilities, they can be life-threatening. For businesses like data centers, power outages can be costly. Other critical facilities at risk include government offices, police departments, fire stations, airports and water/wastewater treatment plants.

Preventive maintenance tips for diesel generators to ensure an uninterrupted power supply that is harmless and consistent to meet all needs. They include the following areas.

Routine general inspection

During the operation of a diesel generator, the exhaust system, fuel system, DC system and engine need to be closely monitored for any leaks that could lead to dangerous occurrences. As with any internal combustion engine, proper maintenance is essential. Diesel engines are no exception. The most important maintenance is to change the oil every 100 hours of operation to ensure long-term trouble-free operation.

Cooling System

During shutdown, check coolant levels at the specified intervals. After allowing the engine to cool, remove the radiator cap and add coolant, if necessary, until the level is approximately 3/4 inch. Heavy-duty diesel engines require a balanced coolant mixture of water, antifreeze and coolant additives. 

Check the exterior of the radiator for obstructions and remove any dirt or foreign objects with a soft brush or soft cloth, taking care to avoid damaging the radiator. If available, use low pressure compressed air or water flow in the opposite direction of normal air flow to clean the radiator.

Fuel System

Diesel is subject to contamination and corrosion within a period of one year, and therefore regular generator set exercise is highly recommended to use up stored fuel before it degrades. The fuel filters should be drained at the designated intervals due to the water vapor that accumulates and condenses in the fuel tank. Regular testing and fuel polishing may be required if the fuel is not used and replaced in three to six months. 

Preventive maintenance should include a regular general inspection that includes checking the coolant level, oil level, fuel system, and starting system. The charge-air cooler piping and hoses should be inspected regularly for leaks, holes, cracks,dirt and debris that may be blocking the fins or loose connections.

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