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2.  A hydraulic excavator (digger) is a large
vehicle that is designed for excavation and
demolition purposes. Hydraulic excavators
consist of a chassis, boom, and bucket, and
move via tracks or wheels.

3. 1.Crawler excavator:
Crawler excavator runs on two endless tracks (chain wheel system).
These types of excavators are used in hilly areas where risks of sliding of
machinery are on the verge. Crawler type excavator has low ground
pressure because of spreading of load on large area. Therefore, it is also
used where soil support is weak.

4. Wheel excavator runs on wheels and are used for excavation and
loading of dump trucks and most of the time it is only used for plain
ground operations. Because of wheel, it is not suitable for hilly
areas due to low grip value to the ground.

5. 1 .Arm
2 .Bucket
3 .Cab
4 .Shoe
5 .Boom
6 .Engine/Hydraulic pump
7 .Counterweight
8 .Track frame
9 .Track chain
10 .Top roller
11 .Bottom roller
12 .Tipping links
13 .Teeth & Get

6. Hydraulic excavators are entirely dependent on hydraulic systems. The
hydraulic excavator’s base consists of a track or wheeled platform and
provides transportation for the vehicle while supporting the chassis. The
chassis allows the driver to control the hydraulic excavator by using levers
to drive the vehicle, raising the boom up and down, and controlling the
bucket. Because the chassis is built on top of the undercarriage, it is able
to rotate 360 degrees. The boom and bucket are attached to the chassis,
work in conjunction to move materials, but are controlled independently.

7. Excavators are used in many ways:
1 .Digging of trenches, holes, foundations
2.Material handling
3 .Brush cutting with hydraulic
attachments
4 .Forestry work
5 .Forestry mulching
6 .Demolition
7 .General grading/landscaping
8 .Mining, especially, but not only open-pit
mining
9 .River dredging
10 .Driving piles, in conjunction with a pile
driver
11 .Drilling shafts for footings and rock
blasting, by use of an auger or hydraulic 12
.drill attachment
13 .Snow removal with snowplow and
snow blower attachments

8. 1.Faster cycle time,
2.Higher bucket penetrating force,
3.More precise digging,and
4.Easire operate control.
5.Doing work more fast.

9. 1.More expensive
2.More weighted
3.Noise
4.Vibration
5.Combursome plant

10. Hydroulic Excavator play an important role in our today
world.We can use this technical machine to solve our hurdles
and difficulties.
THE END