There are two main types of "Control" configuration generally use in excavators to control the boom and bucket, both of which spread the four main digging controls between two x-y joysticks. This allows a skilled operator to control all four functions simultaneously. The most popular configuration in the US is the SAE controls configuration while in other parts of the world, the ISO control configuration is more common. Some manufacturers such as Takeuchi have switches that allow the operator to select which control configuration to use.
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.

The Melroe brothers, of Melroe Manufacturing Company in Gwinner, North Dakota, purchased the rights to the Keller loader in 1958 and hired the Kellers to continue refining their invention. As a result of this partnership, the M-200 Melroe self-propelled loader was introduced at the end of 1958. It featured two independent front-drive wheels and a rear caster wheel, a 12.9 hp (9.6 kW) engine and a 750-pound (340 kg) lift capacity. Two years later they replaced the caster wheel with a rear axle and introduced the M-400, the first four-wheel, true skid-steer loader.[2] The M-440 was powered by a 15.5 hp (11.6 kW) engine and had an 1,100-pound (500 kg) rated operating capacity. Skid-steer development continued into the mid-1960s with the M600 loader.
Skid Steer loaders offer great versatility. Due to their compact size and zero-radius turning circle, it is possible to use them in confined spaces where many other types of heavy machinery cannot reach. They are ideal for landscaping in parks and yards, or moving earth around a construction site; and in some cases it is possible to use them in place of a full-scale excavator to dig holes. Sellers on eBay also offer specialized buckets and attachments for clearing snow, grinding tree stumps, mowing grass, or digging trenches. With so many practical applications, skid steer loaders represent an excellent investment for small businesses looking to streamline some of their methods and improve overall workforce efficiency, and they are also useful for homeowners or farmers with a lot of land to maintain.
 For sale is a 2005 Caterpillar 304CR Excavator, Cab/Heat/Air, Aux Hydraulics, Mechanical thumb,2 Speed,  Backfill Blade, VERY GOOD tracks, Cat Coupler, 10,844# Operating weight, 43 HP Diesel engine, 4,221 Hours.  Cranks right up and runs good, Tracks straight, turns strong both directions.  Has some dents/dings/scratches but seems to be mechanically pretty sound.  Cylinders all seem dry.
22HP and 25HP sub-compact 4WD tractors powered with fuel-efficient engines with 2 range Hydrostatic transmission. Sub-compact chassis allows maneuvering in small, confined spaces and are designed for maximum versatility with available front end loader, mid-mount mower and backhoe--all of which can be attached to the tractor at the same time. These tractors are tailored for small landowners, horse stall owners and commercial users. Each model includes more standard features and boasts superior performance at a lower price than the competition.
We specialize in selling low hour, late model, quality used tractors. We pride ourselves in offering excellent used tractors at fair market prices. We sell used John Deere, Case IH, Ford, New Holland, Massey-Ferguson, and Kubota tractors. We offer easy, low-rate, on the spot financing to qualified customers. We can also arrange shipping to anywhere in the USA.
The make and model category is further divided into the purpose in which a driver sits on the machine and drives it, and the other where the operator works alongside the vehicle. The type of drive is further broken down to wheel type and track type. The wheel type is then broken down into two, three, and four-wheel types of drives, while the track type is subdivided into full and half-track types of drives.
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