The J.I. Case 320-B is an industrial tractor produced from 1958 to 1959 by J.I. Case in Rock Island, Illinois, USA. A total of 51 units were built. It features a J.I. Case 2.6L 4-cylinder liquid-cooled diesel engine with a displacement of 157 ci (2.6 L), rated at 1750 RPM. The tractor offers multiple transmission options including 4-speed, 12-speed Tripl-Range, and 8-speed mechanical shuttle. It is a two-wheel drive mechanical industrial tractor variant within the Case B series.