Komatsu pioneered the tight tail swing design and has optimized it further with the Tier 4 Final PC138USLC. With this excavator you can work in one lane of traffic without disturbing the other lane. Beyond its’ tight swing capability, the PC138USLC has similar digging and lifting power as most standard competitive excavators. Six working modes and efficient Komatsu engine and hydraulic technology help make the new PC138USLC up to 4% more fuel efficient than the previous model.