Basic purpose of this article is to Discuss on Hydraulic Excavator for Maximum Efficiency. An elementary hydraulic excavator consists of a hydraulic canister, a bucket that is attached to the boom and finally, the arm. All the actual parts have different characteristics fitted for construction. Most contractors like the crawler type of hydraulic machine versus wheels and trucks. The crawler type is a great choice when you are coping with muddy grounds and uneven surfaces. A hydraulic excavator is indeed flexible in dealing with soft soils and steep areas.