Tier 4 questions

[ShowroomShine]

I'm a Case dealer rep, and we love Tier 4. Its been out nearly as long at this point as Tier 3. Its a simple system on all of our machines.

You get a cool stainless exhaust, allows the engine to run as it was intended, and has offered no problems in the machines we have sold.

 

[MHarryE]

Emission Standards: USA: Nonroad Diesel Engines

This is the official latest emissions standards. The were set April 11, 2004. Small engines (< 25 HP) have been Tier 4 compliant since 2008. Many companies have been able to delay implementation on some models (Kubota L3800 for instance) by using credits of various types. Popular CUT's had to meet what is often called Tier 4 interim by restricting CO and NOX but were allowed 2 years before needing to reduce soot (PM). There are a lot of loopholes in the law that allowed the manufacturers time to implement over a period of years rather than crash all models in at once. Small diesels got a lesser restrictions because they are small output engines and pollutants are measured in grams per power produced, not total output. In addition the small engines don't rack up the hours the larger tractors do. It's not unheard of, for example, for a hydraulic excavator to get 4,000 hours yearly. The highest usage machine in my test fleet ran over 6,000 hours it's first year. That was a 175 HP 4.4 liter 4 cylinder engine Tier 4 final. Zero core engine problems.