The Perkins 403D is a compact 4-cylinder diesel engine commonly used in a variety of agricultural, construction and industrial applications. Inline 3-cylinder diesel engine, about 1.5 liters displacement, available in naturally aspirated and turbocharged versions for improved performance and efficiency. Commonly used in tractors, combine harvesters and other agricultural machinery, small excavators, skid loaders and other construction equipment, forklifts. The Perkins 403D engine is a reliable and efficient solution for a variety of industrial and agricultural applications.