Skid-steer loaders are typically four-wheel vehicles with the wheels mechanically locked in synchronization on each side, and where the left-side drive wheels can be driven independently of the right-side drive wheels. The wheels typically have no separate steering mechanism and hold a fixed straight alignment on the body of the machine. Turning is accomplished by differential steering, in which the left and right wheel pairs are operated at different speeds, and the machine turns by skidding or dragging its fixed-orientation wheels across the ground. The extremely rigid frame and strong wheel bearings prevent the torsional forces caused by this dragging motion from damaging the machine. As with tracked vehicles, the high ground friction produced by skid steers can rip up soft or fragile road surfaces. They can be converted to low ground friction by using specially designed wheels such as the Mecanum wheel. Skid-steer loaders are capable of zero-radius, "pirouette" turning, which makes them extremely maneuverable and valuable for applications that require a compact, agile loader. Skid-steer loaders are sometimes equipped with tracks instead of the wheels, and such a vehicle is known as a multi-terrain loader.
For example, a homeowner or contractor working on an established lawn might be best served with a tracked machine that will cause less damage - and less rework - to the lawn, saving time and money. Or, much like the small skid-steer loaders, a mini track loader is an excellent way to access narrow or tight areas, such as through a backyard gate or in between buildings built closely together.
* As of June 1, 2018, applies to purchases of new John Deere skid steers, compact track loaders, compact excavators, and compact wheel loaders from John Deere or authorized John Deere dealers. Warranty expires two years after the delivery receipt date or after 2,000 machine hours, whichever occurs first. Offer valid at participating dealers only. Some restrictions may apply. See your dealer for complete details.
Jobsite dimensions are one of the greatest factors to know to fit the skid steer to the job. "Understanding physical limitations of the work area often dictates the class that may be used in the application," says Dennis Turney, Hyundai Construction Equipment. "The next consideration would be the lifting height or dumping height requirement, along with the capacity of the job. Finally, hydraulic capacity needs to known in order to operate any hydraulic attachments.
An extended reach design uses multiple hinges and parallel lifting bars on the loader arm, with the main pivot points towards the center or front of the machine. This allows the loader arm to have much greater operating height while retaining a compact design, and allows the vertical movement to be less of an arc and more straight-up vertical, to keep the bucket forward of the operator's cab, allowing safe dumping into tall containers or vehicles.
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