The Caterpillar 320DL is a hydraulic excavator in Caterpillar's 20-ton class, designed for general earthmoving, trenching, site preparation, and material handling. It is powered by a Caterpillar diesel engine and uses a hydraulic system matched to digging and lifting applications. The 320DL features a conventional upper structure, tracked undercarriage, and a cab configured for operator visibility and control. Common attachments include buckets, thumbs, and hydraulic tools. The model is used in construction, utility, roadwork, and quarry support applications. The 320DL is part of Caterpillar's D-series excavator lineup and is known for its balance of digging performance, fuel efficiency, and service access.