Clean Air

| May 28, 2001

Luber-finer, another leading filter manufacturer, advises against pulling the air filter element out of the housing to inspect it, then replacing it if it appears to be clean. Dirt can be dislodged and spill into the air intake throat of the engine. Plus, a visual inspection of the element can be misleading. A dirty-looking filter may still have considerable service life remaining, and a clean-looking filter might be completely clogged with dirt.

Other filter service tips from Luber-finer include:

Check the old element for uneven dirt patterns. That signals a leak or gasket-sealing problem. Identify and correct before replacing element.

Make sure the gaskets seat properly. If you can’t “feel” the seal, recheck sealing surfaces as well as the product number of the filter. It may be too short for the housing.

Don’t ignore a worn or damaged cover gasket. If your filter model calls for a new gasket every time, use one. Otherwise, replace as necessary.

Don’t substitute filter elements. Elements that look identical can vary in length by fractions of an inch, making a positive seal impossible.

Don’t rap an element to clean it. You can’t shake out embedded dirt; you’ll damage the element trying. Replace it with a new element.
Generally, manufacturers advise against cleaning and reusing air filter elements since it is impossible to remove all of the built-up contaminants. The cleaning process can also damage the filter and lead to engine damage.

Extended Service Filters
Fleetguard offers a standard line of heavy-duty air filters and a Magnum line that has a reference with the extension M. Magnum filters with the same dimensions as standard filters contain more square inches of media for expanded dust-holding capacity and longer life.

Racor air filters from Parker Filtration use water-repelling synthetic media that the company claims
can trap up to eight times more contaminants than pleated-paper filers, eliminating soot plating, salt and water ingestion, and surface loading. The filters also eliminate moisture-related problems, such as icing and corrosion, and they will not prematurely clog from the oily carbon soot in exhaust fumes, says the manufacturer.

Donaldson Company manufactures extended-service Endurance air filters in 35 different sizes to fit the company’s air cleaner housings. The filters are made with proprietary EOM fine fiber media technology, which provides extended maintenance intervals for on-highway trucks. According to Donaldson, EON fibers have submicron diameters and small interfiber spaces, resulting in more contaminants being captured on the surface of the media and lower restriction than filters with larger cellulose fibers.

Endurance air filters hold up to five times more dirt than cellulose air filters, the company says. Operators who change air filters at 150,000 miles can go 300,000 or more miles before replacing them, says Donaldson. He notes that Endurance filters have reached over 400,000 miles with their restriction still within acceptable limits in field tests with large fleets.

Air filter life can also be extended with the addition of a precleaner, a component designed to remove 80 percent to 90 percent of airborne contaminants before they reach the air filter. Precleaners can provide significantly more air filter life in certain applications, especially in environments with high amounts of airborne debris. All heavier-than-air contaminants, including dust, insects, leaves, wood chips, snow and sand, are expelled.

The Power Ram precleaner, which sells for about $300, has also produced a 5 percent increase in fuel economy in one test fleet. It has also produced an extended air filter life of up to six times more than filters in trucks without precleaners, says Maradyne Corp., the manufacturer. Self-powered and requiring virtually no maintenance, the Power Ram can be installed in less than half an hour. A rotating blade inside the metal housing causes incoming air to spin. Centrifugal force isolates the contaminants, which are expelled through discharge ports by a high-velocity, air-powered rotor.

Clean Air

| May 28, 2001

Luber-finer, another leading filter manufacturer, advises against pulling the air filter element out of the housing to inspect it, then replacing it if it appears to be clean. Dirt can be dislodged and spill into the air intake throat of the engine. Plus, a visual inspection of the element can be misleading. A dirty-looking filter may still have considerable service life remaining, and a clean-looking filter might be completely clogged with dirt.

Other filter service tips from Luber-finer include:

Check the old element for uneven dirt patterns. That signals a leak or gasket-sealing problem. Identify and correct before replacing element.

Make sure the gaskets seat properly. If you can’t “feel” the seal, recheck sealing surfaces as well as the product number of the filter. It may be too short for the housing.

Don’t ignore a worn or damaged cover gasket. If your filter model calls for a new gasket every time, use one. Otherwise, replace as necessary.

Don’t substitute filter elements. Elements that look identical can vary in length by fractions of an inch, making a positive seal impossible.

Don’t rap an element to clean it. You can’t shake out embedded dirt; you’ll damage the element trying. Replace it with a new element.
Generally, manufacturers advise against cleaning and reusing air filter elements since it is impossible to remove all of the built-up contaminants. The cleaning process can also damage the filter and lead to engine damage.

Extended Service Filters
Fleetguard offers a standard line of heavy-duty air filters and a Magnum line that has a reference with the extension M. Magnum filters with the same dimensions as standard filters contain more square inches of media for expanded dust-holding capacity and longer life.

Racor air filters from Parker Filtration use water-repelling synthetic media that the company claims
can trap up to eight times more contaminants than pleated-paper filers, eliminating soot plating, salt and water ingestion, and surface loading. The filters also eliminate moisture-related problems, such as icing and corrosion, and they will not prematurely clog from the oily carbon soot in exhaust fumes, says the manufacturer.

Donaldson Company manufactures extended-service Endurance air filters in 35 different sizes to fit the company’s air cleaner housings. The filters are made with proprietary EOM fine fiber media technology, which provides extended maintenance intervals for on-highway trucks. According to Donaldson, EON fibers have submicron diameters and small interfiber spaces, resulting in more contaminants being captured on the surface of the media and lower restriction than filters with larger cellulose fibers.

Endurance air filters hold up to five times more dirt than cellulose air filters, the company says. Operators who change air filters at 150,000 miles can go 300,000 or more miles before replacing them, says Donaldson. He notes that Endurance filters have reached over 400,000 miles with their restriction still within acceptable limits in field tests with large fleets.

Air filter life can also be extended with the addition of a precleaner, a component designed to remove 80 percent to 90 percent of airborne contaminants before they reach the air filter. Precleaners can provide significantly more air filter life in certain applications, especially in environments with high amounts of airborne debris. All heavier-than-air contaminants, including dust, insects, leaves, wood chips, snow and sand, are expelled.

The Power Ram precleaner, which sells for about $300, has also produced a 5 percent increase in fuel economy in one test fleet. It has also produced an extended air filter life of up to six times more than filters in trucks without precleaners, says Maradyne Corp., the manufacturer. Self-powered and requiring virtually no maintenance, the Power Ram can be installed in less than half an hour. A rotating blade inside the metal housing causes incoming air to spin. Centrifugal force isolates the contaminants, which are expelled through discharge ports by a high-velocity, air-powered rotor.

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