This paper presents a general overhaul of industrial steam turbine in the company Petrokemija d.d. rated power 880 kW, from the stage of planning and execution of the overhaul to the final report phase with analysis of the achieved condition of the machine. The considered steam turbine is the driving engine of the air compressor, which is the vital machine for all production facilities at the plant. It is clear that only high-quality maintenance and overhaul execution ensure reliable and safe operation of this essential machine. The study demonstrated the importance of the individual planning phases, execution and analysis of the industrial steam turbine overhaul as a complex technical system. Detailed overhaul planning, supply of the required spare parts and consumables, good organization of the overhaul and hiring skilled manpower are the fundamental preconditions for quality execution of the planned overhaul works.