What is an Excavator
The modern hydraulic excavator is a machine design that started with the early steam shovel and early cable operated shovels.
The need to excavate material on early construction projects and load material into R.R. cars or onto horse drawn wagons without the use of a man and shovel is when the first steam shovel was invented around the late 1890’s .
The early revolving steam shovels were first seen and used around the early 1900’s. From those early shovels came the power shovels with gas or diesel engines and the pull type machines that were cable operated machines were also invented and used for trenching on many construction sites.
In the late 1960’s the first hydraulic excavator was seen and by the early ‘70’s they were on all major construction projects.
The excavator today is used on construction projects, by landscapers, city or village utility districts and the excavator is made in many sizes from over 100 tons to smaller sizes as 10 tons.
The excavator is sometimes called a “trackhoe” this machine has tracks that moves the machine and the tracks on the ground help keep the machine level and stable as the machine digs.
The excavator has an arm or boom and a dipper stick with a bucket and that moves with hydraulic fluid, hydraulic pumps move the fluid, makes hydraulic pressure and hydraulic flow.
Some excavators are equipped with hydraulic backfill blades and can be used for added machine stability when digging or for grading work.
Larger excavators have standard steel tracks with smooth track pads or small bars not deep cleats, one of features of the excavator is the low ground pressure allowing a minimal ground disturbance. The excavator moves with hydraulic drives and a hydraulic pump system.
Hydraulic excavators are mounted on a platform, this platform pivots 360* degrees, hydraulic pumps and controls allows the machine to rotate or swing in any direction. Some excavators have a zero tail swing option which allows the machine to fully rotate within the width of their tracks.
Excavators have an operator area or platform where all the controls are to operate the machine. This area for the operator is designed for the operator comfort with seat, legroom, visibility; joystick operated hand controls and engine decelerator are mostly standard on all excavators.
Many optional work tools can be used with the excavator—hydraulic hammers—hydraulic tampers—hydraulic thumbs—hydraulic angling bucket.
For additional information go to WWW.Excavating Info.Com