You hear them, usually in the early morning hours, making their appointed rounds. Maybe you don’t even notice any longer but in communities across the country, residential and commercial waste haulers provide a vital daily service. To do so, they use trucks equipped with fairly complex hydraulic systems that come with unique needs and challenges. For example, take the city of Orlando, Florida. Its Fleet & Facilities Management Division took up the challenge of the Green Works Orlando initiative to create an environmentally friendly community by converting its residential garbage trucks to hydraulic hybrid models.