Preventive Maintenance is the maintenance system wherein certain maintenance activities are carried out in a planned manner with an explicit objective of detecting weak spots and the perfect functioning of the plant is ensured by suitable preventive measures including replacement of parts which could still be used. Such preventive measures provide a high degree of reliability to the machine. Preventive maintenance can be either “running maintenance” or ‘shutdown maintenance”.
(i) Running Maintenance: It includes preventive maintenance activities like minor adjustments in machines revealed through inspections, lubrication, cleaning and upkeep, etc. which are carried out when the machine is still running.
(ii) Shutdown Maintenance: It includes preventive maintenance activities such as minor component replacement whose needs are identified through inspections, which requires stoppage of machines.
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