KUBOTA COMPACT EXCAVATOR U55-4 Superior 5.5-ton tight tail swing excavator with the power and flexibility to work wonders in narrow spaces, built for tight job sites, landscaping, and trenching. The U55-4 is powered by Kubota’s impressive 47.6 HP direct injection engine. Engineered with the power to maximize digging and lifting performance, it also delivers minimized noise, vibration and fuel consumption.