Hitachi ’s ZW550-6 wheel loader is designed for the heaviest applications, including tough rock and high volumes of dirt, the company says. The 104,000-pound loader runs on a 512-horsepower Isuzu engine that meets Tier 4 Final emissions requirements with no diesel particulate filter, instead using selective catalytic reduction with a simple diesel exhaust fluid system, according to Hitachi. The SCR system does not require high engine temperatures, and it reduces fuel consumption. The SCR’s design also opens more space in the engine compartment for service access. Operators can further save on fuel with auto-shutdown and the lock-up transmission. For additional power, the ZW550-6 has a new Power Mode that with the flip of the switch on the steering joystick boosts engine rpms by 10 percent. The feature comes in handy when needing extra rim-pull and breakout force for digging in heavy piles. It also gives extra power for climbing steep grades with a full load, faster bucket lifts and