Regan Brown
Racor fuel filters are the most frequently used fuel filters and are an essential component in protecting your engine from dirty or contaminated fuel. Cleaning your Racor fuel filter is a necessary task to ensure the optimal functioning of your engine. This article will provide a step-by-step guide on how to effectively clean your Racor fuel filter, covering topics such as disassembling the filter, cleaning techniques, and reassembling tips, to ensure your filter is maintained correctly and your engine runs smoothly.
Characteristics and Values Table for Cleaning a Racor Fuel Filter
| Characteristics | Values |
|---|---|
| Frequency | Clean when the filter is not draining or when there is a build-up of debris |
| Tools | Screwdriver, wrench, paper towels, diesel fuel, soft rag, carburetor cleaner, gasket and o-ring replacements, rebuild kit |
| Steps | 1. Drain the bowl 2. Disassemble the filter 3. Clean the bowl and other parts with diesel fuel and a soft rag 4. Replace the gasket and o-rings 5. Reassemble the filter |
| Notes | Be cautious when using chemicals to clean the bowl. Avoid carburetor cleaner as it may damage the bowl. |
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What You'll Learn
Cleaning the bowl
The bowl is replaceable as a separate item. If you plan to clean the bowl, be cautious of what chemicals you use. Carburetor cleaner, for example, may damage the bowl. As a general rule of thumb, only use diesel fuel as a cleaner with a soft rag.
To clean the bowl properly, it is worth disassembling the device. First, drain the bowl. If there is a lot of black crud in the bottom of the bowl, you can try to remove it by winding a rag up the drain hole. You can also use a screwdriver with suitable padding at the end to rub around the inside of the bowl, washing it through with plenty of fuel, and removing the crud through the drain.
If you want to remove the bowl, you can do so by removing the four screws holding it onto the housing. With the screws removed, slide the aluminium clamping ring up and off the bowl, then remove the bowl from the housing.
To clean the drain plug/pet cock assembly, use a wrench on the nut closest to the polycarbonate bowl to back it out. Once it is out, clean it and then replace the gasket and O-ring with new ones.
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Removing the filter
Locate the Filter: Begin by identifying the Racor fuel filter's location, which is usually near the engine. The filter is housed within a metal casing, often with a transparent section for visual inspection.
Prepare the Work Area: Before starting, ensure you have the necessary tools and a clean workspace. Have a tray or container ready to catch any residual fuel that may drain from the filter during removal. Place a rag or absorbent material underneath the filter to catch any spills or drips.
Disconnect Fuel Lines: Carefully disconnect the fuel lines attached to the filter. This will involve loosening the fittings or clamps that secure the fuel lines to the filter's inlet and outlet ports. Use appropriate tools, such as wrenches or screwdrivers, to avoid damage.
Release the Filter: Depending on the Racor model, the filter may be secured in place with screws, bolts, or clamps. Identify the type of fasteners used and use the correct tools to loosen and remove them. For example, a Racor 500 model typically has four bolts securing the filter, while some models may use machine screws.
Lift Out the Filter: Once the fasteners are removed, carefully lift the filter out of its housing. Be cautious as the filter may still contain some fuel. Place the filter in a safe location where it won't be disturbed.
Inspect and Clean: With the filter removed, you can now inspect the internal components for any signs of damage or excessive debris buildup. Pay close attention to the O-rings, gaskets, and seals, as these may need replacement if they show signs of wear or damage. Clean the filter bowl using diesel fuel and a soft rag. Avoid using harsh chemicals that may damage the components.
Remember to keep track of any gaskets or seals removed during the process, as improper reassembly can lead to leaks. Always refer to the specific model's schematic or manual for precise disassembly and reassembly instructions.
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Using diesel fuel as a cleaner
When cleaning a Racor fuel filter, it is important to be cautious about the chemicals used. Carburetor cleaner, for instance, may damage the filter bowl. One recommended method is to use diesel fuel as a cleaner with a soft rag.
To clean the bowl, you can start by draining it. If there is a layer of dirt stuck to the bottom of the bowl, you can try using a screwdriver with some padding on the end to rub around the inside of the bowl. You can also wash the bowl through with diesel fuel and remove the dirt through the drain. Another method is to add some diesel fuel, put the lid back on, and shake the bowl so that the dirt pours out.
If the dirt is still stuck, it may be worth disassembling the device to clean it properly. You can remove the filter and clean the bowl by taking out the four screws. You can reuse the old O-ring gasket if it was installed correctly. Be sure to keep a good record of your fuel usage so you know how much fuel is in your tank.
As a general rule, it is recommended to have a primary fuel filter if you have a diesel engine of 40 HP or larger. Racor fuel filters are commonly used in powerboats with diesel engines. These filters help protect the engine from dirty or water-contaminated fuel, which can lead to expensive repairs. By understanding how to properly clean and maintain your Racor fuel filter, you can ensure the optimal performance of your diesel engine.
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Replacing the gasket and O-ring
When replacing the gasket and O-ring, be sure to check for any twists in the gasket, as this will cause it not to seal properly. The gasket is square in cross-section, not round, making twists a common issue that can lead to diesel leaks. The little red O-ring should be replaced each time the filter is changed. If you have a vacuum gauge, the same O-ring is used and should also be replaced when rebuilding or replacing a filter.
The correct orientation for the check valve gasket is with the dished side facing away from the ball. This is the opposite of what is usually assumed, as the check valve ball fits perfectly in the dished gasket. Once the gasket has been replaced, and the turbine cover and turbine cleaned, you can reinstall them. Simply place the slotted cover over the ball, then thread the turbine down through it and onto the filter housing. The turbine holds the slotted cover in place. Do not over-tighten, just snug is fine.
The Racor turbine filter has a built-in check valve that requires proper assembly. The check valve gasket must be installed the right way. To assemble, fit the washer onto the drain plug from the inside of the bowl. This is not easy to do. Once the gasket is in place, you can reinstall the turbine and check the valve assembly.
If you are cleaning the bowl, be cautious of the chemicals you use. Carburetor cleaner, for example, may damage the bowl and cause it to need replacing. As a general rule, only use diesel fuel as a cleaner with a soft rag.
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Disassembling the device
Firstly, identify the four machine screws that hold the bowl onto the housing. Using the appropriate tools, carefully remove these screws. It is important to note that these bolts have a quarter-inch head, so a standard 6mm or 7mm socket won't work. You may need to use a screwdriver or an angle grinder to cut a slot in each bolt head for easier manipulation.
Once the screws are removed, you can proceed to the next step. Slide the aluminium clamping ring upwards and off the bowl. This will allow you to separate the bowl from the housing. Be cautious when handling the bowl, as it may contain residual fuel or debris.
Now, you will need to focus on the drain plug/pet cock assembly at the bottom of the bowl. Use a wrench to loosen the nut closest to the polycarbonate bowl, turning it left to loosen it. Remember, "lefty loosey, righty tighty." Ensure you are loosening the correct nut, as there are two nuts in this assembly. The other nut, closer to the hose barb, is used to open and close the pet cock and is not relevant to removing the assembly from the bowl.
After removing the drain plug/pet cock assembly, you can proceed to clean it. Replace the gasket and O-ring with new ones to ensure a proper seal. Additionally, inspect the check valve gasket and ensure it is oriented correctly. It should be installed with the dished side facing away from the ball, providing the correct fit for the check valve ball.
Finally, you may need to clean or replace the turbine cover and the turbine itself. Once cleaned or replaced, reinstall them by placing the slotted cover over the ball and threading the turbine through it, attaching it to the filter housing. Do not overtighten; just snug is sufficient.
By following these steps, you will have successfully disassembled your Racor fuel filter, allowing you to access and clean its internal components thoroughly. Remember to refer to the specific model of your Racor fuel filter for any unique considerations or variations in the disassembly process.
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Frequently asked questions
You can either disassemble the device and clean the bowl with diesel fuel and a soft rag or use a screwdriver with padding at the end to rub around the inside of the bowl, then wash it with fuel.
If your filter is not draining, it is likely due for a clean. If there is dead matter in the bowl, you may want to consider a thorough tank cleaning.
First, remove the four machine screws holding the bowl onto the housing. Then, slide the aluminium clamping ring up and off the bowl and remove the bowl from the housing.
You can try cleaning it with diesel fuel and a soft rag. If that doesn't work, you may need to replace the filter housing.
Use a wrench on the nut closest to the polycarbonate bowl to back it out. Once it is out, clean it and then replace the gasket and o-ring with new ones.
