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The engine powered skid-steer loader has a small and rigid frame, equipped together with lift arms which can connect to several industrial tools and attachments to perform a wide variety of labor saving tasks. Typically, skid-steer loaders are four-wheel drive vehicles which have the left-hand side wheels functioning independent of the right-hand side wheels, although various models are equipped with tracks instead. On the four-wheel models, having each side independent of each other allows the wheel speed and rotation direction of the wheels to know which direction the loader will turn.
The skid-steer loader can carry out zero-radius turns or "pirouettes." This added feature enables the skid-steer loader to maneuver for certain applications that need a compact and agile loader.
The lift arms on the skid-steer loader are located alongside the driver along with pivots at the back of the driver's shoulders. These features makes the skid-steer loader different compared to the traditional front loader. Due to the operator's closeness to moving booms, early skid loaders were not as safe as traditional front loaders, especially in the operator's entry and exit. Today's' modern skid-steer loaders have various features to protect the driver like fully-enclosed cabs. Like several front loaders, the skid-steer model can push materials from one site to another, could load material into a truck or trailer and can carry material in its bucket.
Operation
Generally a skid-steer loader could be utilized on a job location instead of a large excavator by digging a hole from the inside. First, the skid-steer loader digs a ramp leading to the edge of the desired excavation, and then it uses the ramp in order to excavate material out of the hole. As the excavation deepens, the machinery reshapes the ramp making it longer and steeper. This is a remarkably functional way for digging below a building where there is not enough overhead clearance for the boom of a big excavator. For example, this is a common scenario when digging a basement beneath an existing house or building.
The skid-steer loader attachments add much flexibility to the equipment. Like for instance, conventional buckets on the loaders could be replaced attachments powered by their hydraulics consisting of pallet forks, backhoes, tree spades, sweepers, mowers, snow blades and cement mixers. Several other popular specialized buckets and attachments comprise wheel saws, snow blades, trenchers, angle booms, dumping hopper, wood chipper machines, grapples, tillers and stump grinders rippers.
History
During 1957, the first front-end, 3-wheeled loader was invented in Rothsay, in the state of Minnesota by brothers Louis and Cyril Keller. The brothers invented the loader in order to help a farmer mechanize the method of cleaning turkey manure from his barn. This equipment was compact and light and included a rear caster wheel that allowed it to turn around and maneuver within its own length, enabling it to perform the same jobs as a conventional front-end loader.
During the year 1958, the Melroe brothers of Melroe Manufacturing Company in Gwinner, N.D. bought the rights to the Keller loader. They employed the Keller brothers to continue refining their loader invention. The M-200 Melroe was the end result of this particular partnership. This model was a self-propelled loader which was introduced to the market in the year 1958. The M-200 Melroe featured a a 750 lb capacity, two independent front drive wheels, a rear caster wheel and a 12,9 HP engine. By the year 1960, they replaced the caster wheel along with a rear axle and launched the first 4 wheel skid steer loader that was known as the M-400.
The term "Bobcat" is utilized as a generic term for skid-steer loaders. The M-400 immediately after became the Melroe Bobcat. The M-440 version was powered by a 15.5 HP engine and has rated operating capacity of 1100 lbs. The company continued the skid-steer development into the middle part of the 1960s and launched the M600 loader.