Gradall XL5100 III wheeled excavator weighs 55,000 pounds and uses a single Detroit Diesel Mercedes engine instead of two, as its predecessor, the XL5100, did. This conserves fuel, the company says, while producing greater horsepower and operates both the truck carrier and the upperstructure and boom. Eliminating an engine also eliminates maintenance costs associated with the second set of electrical equipment, radiator and filters. A single, 100-gallon fuel tank replaces the two tanks. Models available in 6x4 and 6x6 configurations, and since they are 6 inches narrower than predecessors, no over-width permit is needed.