Excavators are heavy construction equipment consisting of a boom, stick, bucket and cab on a rotating platform, called the "house,” which sits on an undercarriage with tracks or wheels. They replace the old-fashioned steam shovels with all movement and functions of a hydraulic excavator accomplished through the use of hydraulic cylinders and motors. Tracked excavators are sometimes called track hoes. IronSearch listings for excavators includes the popular Caterpillar 320D; Cat 336F L Straight boom; Cat 320EL and 336EL. Komatsu features excavators, mini-excavators and mid-size excavators like the PC30MR-5 model found on IronSearch. When you’re in the market for a new or used excavator, IronSearch.com is your best and most reliable source for ag and construction listings and valuations.