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Construction Equipment - Guide
Guide to Backhoes
Note: Strictly speaking, backhoes are
the arms found on the back of excavators but the term is also commonly used to
describe a certain kind of construction equipment and it is to this usage that
this article refers.
Backhoes are known by a variety of names including backhoe loader, loader
backhoes or just plain backhoe. They are versatile pieces of heavy machinery
consisting of a tractor, with a bucket or shovel on the front and a small
backhoe fitted on the back. However, when both the loader and the backhoe are
permanently attached (sometimes the front assembly is removable) the vehicle is
rarely referred to as a tractor and backhoes are not generally used to tow.
In
fact, in the UK, you are more likely to hear backhoes referred to as JCBs, after
the company that invented them back in 1953. Such a name is obviously inaccurate
in many cases since there are a large number of manufacturers such as Bobcat,
John Deere, Cat, Kubato, Komatsu, Terex, Volvo and Case besides JCB.
Backhoes are commonly used for a wide variety of jobs,
duplicating the work of an excavator, front end loader and bulldozer. This makes
them extremely popular with construction companies reducing the need for more
than one piece of equipment on smaller jobs. They can excavate, dig holes,
transport light building materials, carry out small demolitions, landscape,
break asphalt and pave roads.
The tasks above are achieved by replacing the backhoe bucket with other
attachments such as forks, breakers or a backhoe thumb. Removable attachments
usually have a separate seat on the attachment itself whilst, when the hoe is a
permanent part, the machine usually has a seat that swivels to the back to face
the controls.
The
backhoe attachment is where the operator's skill and experience are critical
since backhoes have three joints that need to be controlled efficiently and
there are serious safety issues if an operator is not properly trained. It's
hydraulic system can deliver tens of thousands of pounds of pressure which means
it can carry out the equivalent work of a large number of people with shovels.
For example, a skilled operator can create a trench or installation hole in 15
minutes or less. However, the design of loader backhoes means they are
intrinsically top-heavy and the swinging weight of the arm can cause the vehicle
to tip. To counteract this, most backhoes use hydraulic outriggers when digging
and also lower the loader bucket to add extra stability. The downside of this is
that, in order for the vehicle to move position the bucket needs to be raised
and the outriggers retracted which reduces efficiency.
Despite the extra time taken to move the vehicle without taking the proper
precautions the temptation to cut corners when operating backhoes should be
avoided. One of the leading causes of injuries and death associated with this
machine is the occurrence of it rolling over. Another common cause of fatality
is electrocution so it is vital that operators be aware of where all overhead
and buried gas and power lines are situated as part of their safety regimen.
This is not said to be alarmist but, rather, to remind you that if you are
thinking of buying a new backhoe or investigating backhoe rental or a backhoe sale
in general make sure you have appropriate safety training before you start
to use it.
If you are looking for or are employed in the construction industry, be aware
that no employer should ask a worker to operate backhoes without them having
first completed and passed the appropriate safety training. If you find yourself
working in a situation that needs you to use or work near people who are using
backhoes or other heavy equipment without the correct training, tell your local
OSHA office or international equivalent.
Used Backhoes ¦ Backhoe Attachment ¦
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