Excavator

Excavator is the machine that can excavate the soil of various types forcefully and then using hydraulic system a hydraulic force is generated and utilizing this force bucket is pull back towards the machine. Bucket of excavator is replaceable. If front bucket is exchange with some other attachments then excavator can be used for multi-purpose. For example: pile diver, hydraulic jack hammer etc.
Excavator comes in numerous sizes depending on bucket size, length of boom, length of arm, and operation speed.
Excavators are mostly used for digging of soils and for loading dump trucks. It is either of :

Excavators are used for: