The equipment and ancillary systems commonly found in hydropower generating plants typically have longer lift cycles than equipment in other industries.  One result of longer lift cycles is that hydropower equipment can experience wear and degradation modes that do not appear in equipment operating in other applications.  The time between major disassembly and overhaul work can also see significant turn-over in the staff available to work on the equipment when the time comes for overhaul or major repair work.  Replacing older machines and equipment can appear to be an attractive option when the time comes for a major overhaul, but in many cases the refurbishment of existing equipment to restore it to new condition can provide significant benefits over the challenges that can arise from integrating new replacement equipment.