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radius (distance between the front of the wheels and the centre of the load) increases. When used as a loader the single boom (rather than twin arms) is very highly loaded and even with careful design is a weakness. A vehicle with a 5,000 lb (2,300 kg) capacity with the boom retracted may be able to safely lift as little as 400 lb (180 kg) with it fully extended at a low boom angle. The same machine with a 5,000 lb (2,300 kg) lift capacity with the boom retracted may be able to support as much as 10,000 lb (4,500 kg) with the boom raised to 70°. The operator is equipped with a load chart which helps him determine whether a given task is possible, taking into account weight, boom angle and height. Failing this, most telehandlers now utilize a computer which uses sensors to monitor the vehicle and will warn the operator and/or cut off further control input if the limits of the vehicle are exceeded, the latter being a legal requirement in Europe controlled by EN15000. Machines can also be equipped with front
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In
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and the most common application is to move loads to and from places unreachable for a conventional forklift. For example, telehandlers have the ability to remove palletised cargo from within a trailer and to place loads on rooftops and other high places. The latter application would otherwise require
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In agriculture the most common attachment for a telehandler are buckets or bucket grabs, again the most common application is to move loads to and from places unreachable for a 'conventional machine' which in this case is a wheeled loader or backhoe loader. For example, telehandlers have the ability
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The advantage of the telehandler is also its biggest limitation: as the boom extends or raises while bearing a load, it acts as a lever and causes the vehicle to become increasingly unstable, despite counterweights in the rear. This means that the lifting capacity quickly decreases as the working
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The first telescopic handler was believed to have been manufactured by French company
Sambron in 1957. In 1971, Liner Construction Equipment of Hull launched the Giraffe 4WD, 4WS telehandler based on a design by Matbro who created a similar machine based on their articulated forestry machines.
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The telehandler can also work with a crane jib along with lifting loads, the attachments that include on the market are dirt buckets, grain buckets, rotators, power booms. The agricultural range can also be fitted with three-point linkage and power take-off.
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than a forklift, with the increased versatility of a single telescopic boom that can extend forwards and upwards from the vehicle. The boom can be fitted with different attachments, such as a bucket,
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which extend the lifting capability of the equipment while stationary, as well machines which are fully stabilised with a rotary joint between upper and lower frames, which can be called mobile
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JCB launched their 2WD, rear steer
Loadall in October 1977. The JCB 520 was originally aimed at construction sites, the potential for agricultural uses soon followed. JCB sold 100,000 units by
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and require elevated work platform licences, such as the EWPA Yellow Card or
Worksafe WP Licence. A WorkSafe C2 licence or higher may apply when using slewing-type telehandlers.
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although they can typically still use a bucket, and are also often referred to as 'Roto' machines. They are a hybrid between a telehandler and small crane.
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to reach directly into a high-sided trailer or hopper. The latter application would otherwise require a loading ramp, conveyor, or something similar.
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In industry, the most common attachment for a telehandler is
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Telescopic handler used for cooling tower construction
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396:"40 years of JCB Loadall production celebrated"
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152:A typical rotating telescopic handler
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