Better Roads

March 2012

Better Roads Digital Magazine

Issue link: https://read.dmtmag.com/i/85911

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maintenance | by Tom Jackson by Tom Jackson TIER 4 ENGINES to 2015, the majority of the engines used in off-road construction equip- ment will receive Tier 4 Interim en- gines this year. And, in just two years, every diesel engine less than 750 horsepower will have to meet Tier 4 W hile the compliance dates for Tier 4 Final engines are staggered from 2008 The kind of engine you get in equipment for the next few years will depend on a complex matrix of credits the EPA offers to OEMs. Final standards . . . except those that don't have to. Unlike on-road diesel engines, most of which all had to meet a new emissions spec on the fi rst day of the year in 2007 and again in 2010, emissions-compliant off-road die- sels are being phased in by different horsepower bands at different times. The diesel particulate fi lter is a new and essential component for reducing exhaust emissions, but requires additional maintenance. 27a March 2012 Better Roads

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