This manual covers the various types of auxiliary power generating systems used on military installations. It provides data for the major components of these generating systems; such as, prime movers, generators, and switchgear. It includes operation of the auxiliary generating system components and the routine maintenance which should be performed on these components. It also describes the functional relationship of these components and the supporting equipment within the complete system. The guidance and data in this manual are intended to be used by operating, maintenance, and repair personnel. It includes operating instructions, standard inspections, safety precautions, troubleshooting, and maintenance instructions. The information applies to reciprocating (diesel) and gas turbine prime movers, power generators, switchgear, and subsidiary electrical components. It also covers fuel, air, lubricating, cooling, and starting systems.