What Diesel Generator Maintenance Is Required?

Diesel generators are reliable and efficient, but like all machines, they require regular maintenance to keep them running smoothly. Depending on the size and type of diesel generator, the frequency and nature of the required maintenance will vary. Here is a general overview of diesel generator maintenance requirements.

What Maintenance Is Required On A Generator?

It is important to do regular visual inspections, as a trained eye can often spot potential problems. Also, check the engine oil and coolant levels monthly. Contact a professional for more extensive inspections every six to 12 months are part of an effective generator maintenance plan. It’s just as crucial to maintain your generator as it is to install it.

How Often Should A Diesel Generator Be Serviced?

An ordinary diesel generator should be inspected and serviced six times a year if it is used often.

Why Does The Manufacturer Recommend Regular Maintenance On The Generator?

Any power-producing system must have a well-planned maintenance program in order to function properly. While operating the generator, be on the lookout for mechanical issues that might pose a risk to yourself or others.

How Often Should A Generator Be Serviced?

Every year, at the very least, the generator should be maintained and the oil and filters replaced by a professional.

How Long Will A Diesel Generator Last?

Diesel generators have a service life of at least 15,000 hours and as much as 50,000 hours. Factors like generator size and preventative maintenance methods will ultimately affect the lifespan of any given generator.

Related Questions and Answers

How many hours should a generator run before servicing?

A diesel generator should run up to approximately 400 days at maximum before servicing.

When should I change the oil in my diesel generator?

A portable generator’s oil should be changed every 50 to 100 hours, while a diesel generator’s oil should be changed every 250 hours. Oil changes for standby generators are necessary after each maintenance session, as well as after extended periods of intense use.

Do generators need to be serviced?

To ensure that your generator is in peak working order, it is always best to have it serviced by a professional. The frequency with which you use this expert service may range from once a year to twice a year.

How often should generator batteries be replaced?

Even if your generator batteries are still functioning, it is recommended that you replace them every 36 months. Ideally, you should replace them every two years to ensure that the generator is ready to start and operate in the event of a power outage.

How long does it take to service a generator?

Every six months or after 400 hours of usage, whichever comes first, you should service your backup generator. A generator servicing can take as little time as a half-an-hour or as long as several hours to complete.

How do I perform generator maintenance?

This video should help you to keep your generator well maintained:

How much does it cost to service a generator?

Annual service contracts are available from a number of leading generator manufacturers. You should anticipate to pay between $150 and $300 per year for generator maintenance, depending on the kind of generator you have and the frequency of your inspections.

What is included in a generator service?

A periodic servicing will include replacing the oil in the engine, inspecting the foundation, and replacing the oil filter. Replace the spark plug (except for diesel units) and inspect the wires and covers of the ignition coils as well. Check and clean the cooling system’s fins (air-cooled) and make sure the fan guard is in good working order and secure.

How do you service a generator?

A Generator should be free of debris. Every year, do a visual inspection for leaks and clean with towels and degreaser. Change the oil, which should also be changed after the first 5 hours, and get a new oil filter to replace. The air filter and the spark plugs should be replaced. Check the fuel filter and make sure the battery is charged. Add Fuel Stabilizer to the tank as well.

How reliable are diesel generators?

In the event of a four-day (96-hour) power outage, well-maintained EDGs can provide backup power with a 92% to 96% reliability (the current criterion for important loads in hospitals), a 90% to 95% reliability after a week, and a 75% to 87% reliability after two weeks (requirements for critical loads at military facilities)

How many hours will a Kubota diesel generator last?

A two-year or 2,000-hour warranty is given to Kubota’s industrial engines; critical engine components are covered for three years or 3000 hours. It doesn’t matter which comes first. Kubota diesel engines may survive up to 10,000 hours with appropriate maintenance.

What are the 4 types of maintenance?

We may classify maintenance approaches into four broad categories: corrective, preventative, risk-based, and condition-based.

What are the 4 types of system maintenance?

Four forms of maintenance exist: corrective, adaptive, perfective, and preventive (or proactive) maintenance.

How long should a generator run before changing the oil?

After only 25 hours of use, most new generators need an oil change. Every 50 to 60 hours, you’ll have to throw out the filter as well and start the machine again. So you’ll need to stock up on enough oil and factory filters to last a few days (at the very least).

How many hours a day can you run a generator?

It is recommended that you only use a generator for 500 hours at a period or little under 21 days. Check the oil and coolant levels and allow the generator to cool down while you do this.

Is synthetic oil better for generators?

As a result of its ability to manage temperature swings, synthetic oil cleans your engine while in operation, and it is generally less environmentally damaging than other types of oil. There are a variety of synthetic oils, each with a different set of additives, that can handle just about everything.

What type of oil does a diesel generator use?

All RV diesel generators should be lubricated with 15W-40 generator oil. At low temperatures, its 15W viscosity allows for the replacement of ordinary 5W-40 lubricants in RV diesel generators. This type of oil is designed for extreme temperatures.

How do you maintain a battery from a generator?

Battery terminals need to be cleaned and tightened as oxidation can occur between the two. This must be done to prevent harm to the battery. The terminals may also be protected using a substance like vaseline or another protection product.

How do you check a generator battery?

The generator set would be incomplete without batteries. The battery should be monitored in accordance with the manufacturer’s recommendations. This usually includes making sure there is a trickle charge, using a multimeter, checking the battery’s voltage at regular intervals, and performing battery load tests on a regular basis.

Does a generator charge its own battery?

Yes and no. While the generator is functioning, the battery can be recharged. It is necessary to operate the generator for many minutes in order to replenish the battery charge lost during engine start-up.

Can I leave the oil in my generator?

Yes, oil can be left in a generator as long as the generator does not sit unused for too long.

Your generator will consume less oil if it is free of leaks and properly maintained. If you intend to use your generator again, before putting it away make sure to check and fill up the oil. Only a few tablespoons are needed for most generators. Regular motor oil may be used instead of dedicated generator oil.

How much is maintenance on a Generac generator?

Generac generators, like other models, need yearly service. Some specialists provide lower-cost choices ranging from $80 to $150 every checkup instead of Generac’s $200 annual service subscription.


This post should give you an idea of how best to maintain your generator. Additionally, a “diesel generator maintenance schedule” will help you to keep your diesel generator well maintained. This means it will be ready to run when you most need it.

NEXT UP: What Is A Normal Diesel Generator Running Temperature?

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James Sylvester
About James Sylvester

James S. Sylvester is an experienced OSHA Safety Supervisor with years of experience in the construction and oil & gas industries. He focuses on workplace safety, occupational health and safety systems. Learn more about James' here or connect with him on Twitter