The Caterpillar 963D is a tracked wheel loader in Caterpillar's medium wheel loader lineup, designed for material handling, stockpiling, truck loading, and general construction work. It is powered by a Caterpillar diesel engine and uses a hydrostatic drive system for smooth operation and precise control. The 963D features a lift-arm loader arrangement, enclosed cab, and compatibility with a range of buckets and work tools. Common applications include aggregate yards, waste handling, site preparation, and industrial material movement. The model is known for balanced performance, operator visibility, and service access. It is part of Caterpillar's 963 series of track-type loaders.