Hitachi's Zaxis Series excavators were introduced in 2002, followed in 2006 by six Dash-3 upgrades to the series covering the 24- to 85-metric ton range. In 2007, Hitachi unveiled two utility-class model upgrades, the ZX200LC-3 and the ZX225USLC-3. Although these units fall below the weight and capacity range typically used in quarry applications, their feature set illustrates the common design trends adopted by manufacturers throughout the larger weight classes. For example, Hitachi notes that the 47,015-pound Zaxis 200LC-3, powered by a four-cylinder Tier 3-certified Isuzu engine, is heavier, stronger, faster and quieter than its predecessor, but uses less fuel. The cab is prepped for auxiliary hydraulics. Other options include several arm and shoe sizes, super-long fronts, control pattern change valve and auxiliary hydraulic accessories. Other key features include a stronger undercarriage, X-beam, side frames, idler brackets and front attachments. The ZX200LC-3 also has higher horsepower, swing torque and drawbar pull than its predecessor. It holds 10.6 gallons more fuel and hydraulic oil, but requires a half a gallon less engine oil.

The slightly heavier (53,440-pound) ZX225US LC-3 shares the same engine and improvements as the ZX200LC-3 but is configured differently, with a rear swing radius that is 3.5 feet shorter than the ZX200LC-3 (thus, the Ultra Short designation). Because of its truncated length, Hitachi says the ZX225US LC-3 is 6% more stable than the ZX200LC-3, but offers essentially the same cutting and dump-height capabilities.

During mid-2006, Hitachi introduced the Zaxis 350LC-3, which replaced both the Zaxis 330LC and Zaxis 370 models. The Zaxis 350LC-3 weighs 77,269 pounds and comes standard with a 13-foot 1-inch arm, a 16,314-pound counterweight and 32-inch triple semi-grouser shoes. Other arm lengths are optional. Powering the 350LC-3 is Isuzu's new AH-6HK1YSA-01 Tier 3-certified diesel, rated at 271 net horsepower. The engine employs a common-rail, fuel-injection system and cooled exhaust gas recirculation (EGR).

Dash-3 improvements include stronger undercarriage and strengthened upper structure for the 350LC-3. Track links are thicker and three track guards protect track links from disengagement during steering. The track chain is sealed and lubricated. The upper structure features Hitachi's D-section frame skirt for increased rigidity. At the arm-bucket joint, the arm top is hardened with tungsten-carbide thermal spraying for greater wear resistance at its contact surface with the bucket.