When To Change Your Onan Fuel Filter

The Onan generator is a popular choice for RVs. It is imperative to perform general maintenance on the Onan RV generator to ensure it runs smoothly. While some people opt for yearly oil changes and Seafoam treatments, others recommend changing the fuel filter every two years or 500 hours of use to prevent rust and keep the generator in good condition. The fuel filter is easily accessible from underneath the RV, and the replacement process is relatively straightforward and can be completed within 15 minutes. It is important to consult the owner's manual for specific instructions and part numbers before attempting any maintenance or repairs.

The fuel filter should be replaced every 500 hours of use or every two years

The fuel filter in an Onan Quiet Diesel generator should be replaced every 500 hours of use or every two years. This is a straightforward task that can be completed in about 15 minutes. It is important to keep the generator well-maintained to ensure it runs smoothly and efficiently.

The fuel filter plays a crucial role in the engine's performance by filtering out impurities such as dirt, debris, and other particulates from the gasoline before it reaches the engine. Over time, the fuel filter can become clogged, leading to decreased engine performance. Therefore, regular replacement of the fuel filter is essential.

The process of changing the fuel filter on an Onan generator is relatively simple and can be done by following these steps:

• Open the fuel filter access panel, usually located under the generator.
• Set up a drain pan to catch any fuel drips and clean the area.
• Disconnect the fuel lines from the fuel filter.
• Remove the old fuel filter carefully, as it will still contain fuel.
• Install the new fuel filter by hand-tightening the fuel line nuts and the centre nut.
• Use a wrench to secure the fuel line nuts, tightening them further after they are seated.
• Clean up any fuel drips with a rag.
• Re-prime the fuel line by holding down the generator stop switch for about a minute.
• Start the generator and check for any fuel leaks.
• Let the generator idle and turn on high-power appliances to put a load on the generator.
• Allow the generator to run for 5-10 minutes while continuing to check for fuel leaks.
• Shut down the generator, replace the access panel door, and dispose of used fuel and filters properly.

By following these steps and replacing the fuel filter every 500 hours of use or every two years, you can ensure that your Onan Quiet Diesel generator runs reliably and efficiently, powering your RV for many years.

The fuel filter is located underneath the generator

Before you begin, make sure you have the right fuel filter for your generator. Consult your owner's manual for the exact part number. You can purchase the correct fuel filter online or directly from Cummins.

Now that you've located the fuel filter, it's time to start the replacement process. Place a drain pan underneath the filter to catch any fuel that may leak during the process. Use a rag to wipe down the old fuel filter and the surrounding area. Be sure to wear safety goggles to protect your eyes from any fuel splashes.

The next step is to disconnect the fuel lines from the fuel filter. Using two open-end wrenches, loosen the nuts securing the fuel lines into the filter. Be aware that some fuel will drip, so keep the drain pan in place. Once the fuel lines are disconnected, carefully remove the old fuel filter as it will still be full of fuel.

Now it's time to install the new fuel filter. Hold it in place and finger-tighten the fuel line nuts and the centre nut. To avoid cross-threading, always start nuts by hand. Use your wrenches to secure the fuel line nuts, tightening them a little more after they're seated against the fitting.

Before closing the access panel, check for any fuel leaks. Start the generator and look underneath to inspect for leaks. If you notice any drips, shut down the generator immediately and re-torque the nut. If there are no leaks, you can close the access panel door, making sure it's securely latched.

Finally, don't forget to dispose of the old fuel filter and any oily rags at an appropriate disposal or recycling centre.

The fuel line needs to be plugged or pinched off to prevent fuel leakage

The fuel filter on an Onan generator should be replaced every 500 hours of use, or every two years, to ensure the generator continues to run smoothly and efficiently.

When replacing the fuel filter, the fuel line needs to be plugged or pinched off to prevent fuel leakage. This is because, once the fuel line is removed from the fuel filter, gravity will cause the fuel line to leak gasoline.

To prevent this, the fuel line should be plugged or pinched off before removing the fuel line from the fuel filter. This will stop gasoline from leaking out of the fuel line. It is also important to wear eye protection and gloves during this process to protect yourself from fuel splatter.

Additionally, have a fire extinguisher nearby in case of any accidents. Once the fuel filter has been replaced, check for any fuel leaks by looking underneath the generator and inspecting the fuel connections for any drips. If there are no leaks, you can be confident that the fuel line was plugged or pinched off effectively during the replacement process.

Use a rubber grommet to reveal the fuel filter

To replace the fuel filter on a Cummins Onan RV Generator, you'll need to reveal the fuel filter by removing a rubber grommet from the oval hole. Here's a detailed guide on how to do this:

First, make sure you have the necessary tools and a new fuel filter. It's recommended to use genuine Cummins Onan Green Label Parts for the best results. Additionally, have some Permatex High-Temperature Thread Sealant ready to use during the installation.

Now, locate the fuel filter access panel under the generator. Open this panel to access the fuel filter. Before proceeding, make sure to set up a drain pan to catch any fuel that may spill during the process.

The next step is to remove the fuel line from the fuel filter. It's important to plug or pinch off the fuel line to prevent gasoline leakage due to gravity. Once the fuel line is secure, you can easily remove the rubber grommet from the oval hole, revealing the fuel filter.

At this point, you'll need a deep well 9/16" socket that fits perfectly on the end of the fuel filter. Slowly turn the socket counterclockwise to unscrew the old filter from the fuel pump. Be cautious as the fuel filter will be full of gasoline, so protect your eyes during this step.

After removing the old fuel filter, it's time to install the new one. Apply a small amount of Permatex High-Temperature Thread Sealant at the base of the threads on the new fuel filter. Ensure the new fuel filter is the correct part for your specific Onan generator by referring to your RV's manual.

Now, carefully insert the new fuel filter into the oval hole, connecting it to the fuel pump. Take your time during this step to ensure the threads go on straight and don't cross. Once the fuel filter is in place, tighten it with a socket, being careful not to overtighten it.

Finally, replace the rubber grommet and the fuel line. Congratulations! You've successfully replaced the fuel filter on your Cummins Onan RV Generator. This process should take less than 15 minutes and will give you peace of mind, ensuring the reliable operation of your generator.

A socket wrench can be used to remove the nut at the centre of the fuel filter

The Onan fuel filter should be changed every 500 hours of use to ensure the generator continues to run and power your RV reliably.

Changing the fuel filter on an Onan generator is a straightforward task. The first step is to open the fuel filter access panel, which is located under the generator. Once the panel is open, the fuel filter will be easily visible.

Now, to the heart of the matter: removing the nut at the centre of the fuel filter. This is where a socket wrench comes in. Place a socket wrench on the nut and turn counter-clockwise to loosen and remove it. The fuel filter will still be full of fuel, so be careful when handling it.

Before removing the nut, it's important to disconnect the fuel lines from the fuel filter. Use two appropriately-sized open-end wrenches to loosen the nuts that secure the fuel lines. It doesn't matter which fuel line you remove first, but be aware that some fuel will drip, so have a drain pan in place to catch it.

Once the fuel lines are disconnected, carefully remove the fuel filter, being mindful of the remaining fuel inside. Place it in the drain pan and turn it face down to drain as much fuel as possible.

After the old fuel filter is removed, you can install the new one. Place the new fuel filter in position and finger-tighten the fuel line nuts and the centre nut. To avoid cross-threading, always start nuts by hand. Then, use open-end wrenches to secure the fuel line nuts, tightening them a little more after they're seated against the fitting.

The Onan generator fuel filter change is now complete. It's a simple process, but it's important to take your time and be careful when handling fuel.

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