Generator set maintenance quiz

During routine weekly or monthly tests once it starts the engine only needs to be run briefly without a load.

False: Perkins recommends that the engine be run under at least 1/3^rd load and long enough to reach full operating temperature on a regular schedule as recommended in its operating manual. This ensures that the engine not only starts, but also operates properly under load and bringing the engine and lubricants up to operating temperature helps eliminate condensation.

If a generator set isn’t in constant use oil and filter changes can safely be per-formed according to actual run-time rather than a calendar-based schedule.

False: This generally is a mistake. Changes in temperature and humidity can create condensation inside an engine which can contaminate lubricating oil and even cause corrosion. Changing oil and filters on a regular calendar-based schedule if the recommended number of operating hours has not been reached will help prevent condensation damage.

Fuel condition should be regularly monitored and the fuel replaced as necessary.

True: Even clean diesel fuel can support the growth of bacteria and other organisms that can clog filters and injectors. Contamination with dust and dirt as well as condensation are all possible when fuel sits in a tank for long periods of time. As a rule of thumb, fuel that has been in the tank longer than three to six months should be tested and replaced as necessary.

Even if the engine is rated for biodiesel some special precautions still are required.

True: Because standby generator sets tend to sit idle for long periods, leaving biodiesel in the fuel system can attract moisture, bacteria and fungi that can lead to issues when the engine is restarted. Whenever biodiesel is used it’s also very important to drain the tank and replace the fuel filters before filling the tank with clean petroleum diesel. Then run the engine for 10 to 15 minutes to remove all of the biodiesel from the fuel system.

There is no reason to regularly inspect the air filter if the engine has not been run for long periods.

False: The air filter protects the engine from potential damage caused by airborne dirt and dust particles. A clean air system also ensures that adequate amounts of combustion air are available to support a clean burn and minimise emissions. The air filter should be checked regularly and any dust or blockages that have accumulated on the covers or ducts should be removed.

As long as the engine starts there is no need to check or maintain the battery.

False: A weak or undercharged battery may start the engine once, but that is no guarantee it will start the engine again. In fact, an insufficiently charged battery is one of the leading reasons back-up generators don’t start when needed. Follow the battery manufacturers maintenance and testing recommendations will help ensure that this does not occur.