Caterpillar replaced the 307C and 308C CR mini excavators with the new D-Series 307D and 308D CR (compact radius), and added a swing boom to the 308 to create the 308D CR SB. The new mini excavators outperform their predecessors with 22 percent greater bucket forces and 10 percent greater stick forces, and lift capacity has been increased with added counterweight. A 15 percent increase in traction forces improves dozing and turning performance. They’re powered by a new Tier-4-certified Mitsubishi 4M40 TL engine, rated at 54 net horsepower. A new rubber undercarriage option, standard high-pressure auxiliary hydraulics and standard thumb-ready sticks make the machines versatile.
September 28, 2010