![]() However, newer machines use either sequence valves or electronics to complete the action with one push of a lever or button. Older trucks required an operator’s thoughtful lever-operated directional control valve actuation to sweep and compact the trash. The sweep blade and compactor action both use hydraulic cylinders. ![]() It goes without saying these machines are heavily hydraulic powered, and these trucks indeed take advantage of hydraulic power density. The garbage is tossed into the gaping rear end and periodically compacted with what looks like a giant Hungry Hippo. The most common garbage truck (sometimes call a refuse truck), and the one most people think of, is the rear loader. Garbage trucks follow the regional recipe, so depending on municipal preferences, recycling requirements and the efforts of the salespersons offering products into that region, each locale may use a different machine. Have you ever visited another state, province or country and seen a local piece of machinery seemingly designed on another planet? Dump trucks, concrete mixers and snowplows are often designed for and from regional preferences. And unless you’re the type of fluid power aficionado to be reading this article anyway, fewer people know how prolific hydraulics are in the waste management process. But few of us understand the path trash takes from our curb to either its place of reincarnation or place of final rest. ![]() Sure, everyone sees a garbage truck occasionally, and you may even leave your city workers a Christmas present every winter. Waste management is an industry considered best operating in the wings, leaving the main stage orderly and immaculate. Hydraulic cylinders and valves are common on refuse machinery, as they bring the rugged power for controlling, lifting, filling, compacting and dumping in the many types of refuse vehicles used.īy Josh Cosford, Contributing Editor Image courtesy of Advance Disposal
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