The Caterpillar Diesel Particulate Filter System for off-highway machines has earned Level 3 conditional verification from the California Environmental Protection Agency Air Resources Board.

The verification formally recognizes the Caterpillar passive filter system as effective and reliable in achieving at least an 85 percent reduction in particulate matter exhaust emissions. The system also meets the California 2009 regulation governing nitrogen dioxide emissions. Conditional verification is equivalent to verification, making the system legal for sale in California.

The verification covers wheeled machines with Tier I, II and III engines in the 175 to 300 hp (130 to 224 kW) range. Caterpillar expects the verification to be extended to tracked machines and the horsepower range extended as more field test data are considered.

The Caterpillar diesel particulate filter system features a passive regeneration system to automatically remove particulate buildup. The filter requires no downtime to regenerate and no external heat source or fuel source.

Caterpillar Emissions Solutions offers a number of retrofit options through local Caterpillar dealers.

For more information, visit www.cat.com/EmissionsSolutions.

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