Liebherr R 920 Proficient at Many Tasks

摘要

Whatever term you might use to describe them-"compact," "close-radius," or "reduced-tail-swing"-hydraulic excavators designed to limit the distance the upper structure extends over the tracks at 90 degrees are becoming increasingly popular, especially among buyers who must be mindful of the machine's working envelope. When these machines first appeared, prospective buyers questioned whether digging and lifting performance would be compromised (what with far less machine hanging out the back to serve as counterweight) and whether operator cabins would be smaller (maybe even uncomfortably so) to accommodate the upper's shortened dimensions. For the most part, excavator manufacturers have solved those potential shortcomings. The Liebherr R 920 LC Compact Litronic illustrated that point during a recent Construction Equipment field test.