W hat is a crawler loader? A crawler loader, also track type loader or simply track loader is an earth-moving- machine. The crawler loader is mainly used for the loading of trucks or other transport vehicles, when the more economic use of a wheel loader is not possible. The crawler loader consists - as its name suggests - of a chain drive, a cabin and a loading shovel. The chain loaders are usually built very dense and robust so that they resist the difficult requirements in special working areas.