Repairs is divided into a current, recovery and overhaul. Capital - a substantial overhaul of fixed assets, the largest in volume form of scheduled maintenance, under which a disassembly of the unit, replacing all worn parts and assemblies, repeated not less than one year (in maintenance unit or do not understand, or disassembled part, without replacement or repair of basic parts). After overhaul the technical parameters of the machine should be closer to the original. Often at the same time carried out and modernization.