The re-powering of older, unregulated off-road construction equipment with new, emission-controlled diesel engines is an extremely cost-effective emission control strategy, yielding significant reductions in both ozone precusor and toxic air contaminant emissions.
826003.00
The six pieces of off-road construction equipment have an average age of greater than 20 years. Originally, these scrapers were equipped with unregulated diesel engines with NOx emission levels greater than 11 grams per brake horsepower-hour. The new engines have NOx plus non-methane hydrocarbon emission levels on the order of 3.0 to 4.6 grams per brake horsepower hour; approximately one-third to one half the current emission levels. The Caterpillar 651B scrapers were originally equipped with the Caterpillar D346 diesel engine rated at 550 hp. This engine was scrapped with replaced with a new, Tier 3 Caterpillar 3456E engine. The replacement engine is electronically controlled and rated at 3.0 g/bhp-hr NOx plus NMHC. The Caterpillar 657B dual engine scraper, originally equipped with Caterpillar D346B and D343 engines, was re-powered with Caterpillar 3456E and 3406 engines rated at 4.8 grams per brake horsepower-hour NOx plus NMHC.
Jagur Tractor re-powered five (5)Caterpillar 651B single engine scrapers and one (1) Caterpillar 657B dual-engine scraper with new Tier 3 and Tier 2 engines in lieu of rebuilding the existing, unregulated engines.
The re-powers of the off-road construction equipment was completed in May 2007. All equipment is currently operating in revenue service with no problems or issues reported.
Quinn Company and Johnson Machinery were hired to perform the engine repowers. Both are authorized Caterpillar dealerships. No reportable problems were encountered during re-power of the six scrapers.
Johnson Machinery