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Backhoe Loader Arm
A backhoe is a term often used to refer to a loader backhoe, but it is actually only the arm and bucket used to excavate material by drawing it back towards the machine. It is also commonly called a rear actor or back actor.

A machine that moves on its own chassis and is only equipped with a fixed backhoe is called a hydraulic excavator. Still backhoe attachments are available for any number of different pieces of equipment.

Contents

[edit] History

Backhoe technology began in 1835 with the invention of the “dipper shovel,” which could excavate hard soil and rock, and load it into trucks. It was a steam-powered machine mounted on rails for mobility. Eventually rail lines were laid into mines and large excavation projects so they could make use of the new machine.

However, the dipper shovel was an extremely large machine with limited movement. The backhoe became its smaller and more versatile descendent.

From the early 1900s until the 1950s, the backhoe was incapable of working smaller projects because of its size. So, those jobs were worked with agricultural tractors.

In the late 1950s, residential development was booming and house construction required a smaller machine capable of operating in tight spaces. This spurred changes in backhoe design.

By 1952 Whitlock Bros of Essex uk,{Later becomming HY-MAC} took the backhoe’s versatility even further by attaching a loader to the opposite side of the machine. The BackHoe Loader  was born.

HY-MAC 370 and 370c series added a 4 in 1 bucket, shuttle control and the off set back actor system.

[edit] Case's Tractor-loader Backhoe

Case Construction Equipment played a huge role in the development of the backhoe. In 1957, Case acquired American Tractor Corp., a purchase that included a crawler with a hydraulic backhoe attached to the machine. This coincided with Case’s plans to build an industrial-wheel tractor that could be used with the backhoe in the rear of the machine and a loader in the front. It was this year that Case developed the famous Case Model 320, a tractor with a combination loader backhoe.

Over the years, Case continued to develop its line of machines, which included excavators and skid steer loaders. The company reinvented the factory-integrated tractor loader backhoe model in the form of a modern machine, the 580D in 1982, in a bid to commemorate 25 years since the machine’s induction.

In 2000, Case contributed to the development of the backhoe by being the first manufacturer to include ride control on a loader backhoe. More recently, Case has introduced the M Series, a line of loader backhoes with Pro Control System, an exclusive backhoe hydraulic quick coupler, and increased loader lift power.[1]

[edit] Features/How it Works

The backhoe arm and bucket is hydraulically operated. This means it consists of hydraulic lines, a reservoir of hydraulic fluid, a pump, and a series of pistons.

The pump exerts pressure on the hydraulic fluid, which is then released into the piston. The piston then expands to lift and swing the arm, and press the bucket into and out of the soil.[2] By reversing a valve, the fluid flows out of the piston and back into the reservoir, lowering the arm.

[edit] Common Manufacturers

[edit] Used & Unused Backhoes for Sale

Search for unused and used backhoes being sold at Ritchie Bros. unreserved public auctions.

[edit] References

  1. History. Case Construction Equipment. 2008-09-24.
  2. Backhoe. madehow.com. 2008-09-23.