This workshop service repair manual covers the Perkins 2306 and 2806 series industrial diesel engines. It details the 14.6L and 15.8L configurations, both featuring 6-cylinder in-line, 4-stroke, turbocharged, direct injection diesel designs. These engines are engineered for robust performance and reliability in demanding industrial applications. This comprehensive manual provides essential information for the maintenance, servicing, and repair of these Perkins diesel engines. It includes detailed procedures, technical specifications, and diagnostic guidance across a wide range of systems, including the cylinder head, piston and connecting rod assemblies, crankshaft, fuel system, lubrication system, cooling system, and electronic controls. The content is designed to assist owners, technicians, and mechanics in ensuring optimal engine operation and longevity.