![]() While the actual design of a swivel can be unique to a machine or manufacturer, the overall concept for how it works and functions is fairly straightforward. The swivel solves this hydraulic conundrum by connecting upper hydraulic hoses and lower hoses in a way that allows each to pass fluid freely and unaffected by the machine’s twists. If you picture these connections all happening through simple hydraulic hoses, you’ll quickly see the problem: a fast developing cluster of twisted, tangled, and torn hoses. Since many of the parts on an excavator are hydraulic, the upper hydraulic controls, pumps, and valves need to be connected to the lower motors and final drives that propel the machine. If you’ve ever seen an excavator in action, you already know that the machine has an upper part with the cab, engine, and boom (the house) and a lower part with the parts that move the entire machine ( the undercarriage). If you’re an excavator expert, this will already be clear, but for the less excavator-enlightened, we’ll take a quick minute to explain. What Does the Swivel (Rotary Distributor) Do on an Excavator? To learn how the swivel does this task and see it in motion, keep reading. At its core it’s not the most complex, but the smart design of the swivel cleverly connects the hydraulics in the upper part of the machine to the lower while letting each move independently. From swing motors to rotate the housing to the slewing ring that allows it to smoothly spin, a lot of well-designed parts come into play to allow the machine to rotate.Īnd one part that often gets overlooked is the swivel. This infinite, omnidirectional twisting is one of the key factors that make an excavator such a versatile and important machine on a construction site, but, though it might seem simple enough, it takes smart design and clever mechanics to pull off this feat. ![]() The functionality of this free-wheeling spinning allows an excavator operator to quickly and efficiently reposition the bucket, adjust the digging angle, and move materials from a pile in the front of the machine to a truck waiting behind it. One of the core aspects of an excavator is its ability to rotate the housing and arm – multiple times and in both directions.
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