Tag: Tier 4 Interim engines

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Oil analysis in the Tier 4 era
With EPA emissions compliant engines everything’s the same – just more intense.
January 1, 2013
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Equipment Experts
The inner-workings of Komatsu’s Tier 4 Interim engines
Physics and chemistry dictate that most Tier 4 Interim engines follow a common design formula to reduce emissions. Above 75 horsepower most manufacturers have increased fuel injection pressures, boosted turbos, ramped up exhaust gas recirculation (EGR) rates and added aftertreatment that traps or burns off what the Environmental Protection Agency doesn’t want going out the […]
November 1, 2012
Equipment
The inner-workings of Komatsu’s Tier 4 Interim engines
Physics and chemistry dictate that most Tier 4 Interim engines follow a common design formula to reduce emissions. Above 75 horsepower most manufacturers have increased fuel injection pressures, boosted turbos, ramped up exhaust gas recirculation (EGR) rates and added aftertreatment that traps or burns off what the Environmental Protection Agency doesn’t want going out the […]
November 1, 2012
On Komatsu’s Tier 4 Interim engines emissions reductions are handled by a variable geometry turbo, high pressure common rail fuel injection, cooled EGR and a DPF that includes a diesel oxidation catalyst and a catalyzed soot filter.
Equipment
DPFs and DOCs: The new components at the heart of your Tier 4 engine
Plumbed into the exhaust stream of many diesel powered off-road machines you buy today is either a diesel oxidation catalyst (DOC) or a diesel particulate filter (DPF) or both. While there has been much talk and concern over these changes, the reality is that these engines and their emissions control systems are here to stay. […]
August 27, 2012
Ultra-low sulfur diesel must be used in DOCs to prevent the sulfur from “poisoning” the catalysts. Low-ash, API CJ-4 lube oil should be used to prevent ash from building up in the DPF.
Equipment
Machine Matters
Is it time for a new wheel loader?   Advanced electronics, drivetrain refinements make the case for a new machine    By Marcia Gruver Doyle     As you’ve waited for the economy to turn, your wheel loaders have aged, and now those machines are perhaps two generations behind what’s currently in dealer order books. […]
August 7, 2012
Volvo says its L110G and L120G models offered significant improvements over previous models, including a 25 percent increase in lifting force.
Equipment
Maintenance
TIER 4 ENGINES 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. By Tom Jackson While the compliance dates for Tier 4 Final engines are staggered from 2008 to 2015, the majority of the engines used in off-road […]
January 27, 2012
The diesel particulate filter is a new and essential component for reducing exhaust emissions but requires additional maintenance.
Equipment
Rebuilt Machines
Track-type tractors New, used and rental aren’t your only options By Tom Jackson Mechanically speaking, rebuilding an older bulldozer from the ground up is a lot of work, but relatively straightforward. There are seven or eight major component groups, depending on what you count, that can be pulled and replaced with new or rebuilt components. […]
March 24, 2011
When this Cat D8L was brought in (left picture), it had more than 25,000 hours after being used by a utility company to work their coal stockpile. (The ROPS was removed for transportation purposes.) At right, the rebuilt machine prior to shipping.
Business
Machine Matters
Fill out the team Pavers remain the cornerstone of a road contractor’s arsenal, but is another full-time member primed to join the equipment team? By Mike Anderson   If you’re a paving contractor, no doubt you’re used to having milling equipment working at your jobsites. The use of cold planers as part of the road […]
March 24, 2011
Roadtec asphalt pavers, including the 225-horsepower tracked RP-195 model, boast sturdy frames that start with a 2-inch-thick front cross member, joined to two continuous side sheets that run the entire length of the machine and then wrap around to make up the rear. The side sheets are also connected by numerous cross members throughout the length of the paver.
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