Excavators are of great importance in construction sites. Excavators are made up of many parts that work together to get the job done. Main Parts of an Excavator As mentioned, an excavator has many parts that work together to get the job done. The most common parts are: Motor: it creates the power used in moving an excavator. The motor can be powered by petrol, fuel or even electricity. It’s good to note that while there are electric excavators in the market, they are very rare and they are designed to work in specialized areas.