Corrective maintenance:
Corrective Maintenance is a maintenance activity undertaken to overcome the failure or damage found during the preventive maintenance period. In general, corrective maintenance is not a scheduled maintenance activity, because it is done after a component is damaged and aims to restore the reliability of a component or system to its original state.
Corrective maintenance also is known as breakdown or run to failure maintenance. Maintenance is only done after equipment or machine is damaged. If this maintenance strategy is used as the main strategy will result in a high impact of unplanned maintenance activities and replacement parts inventory.
Types of Corrective maintenance:
Planned Corrective Maintenance: Done when it is known early on when the equipment should be repaired so that it can be started from the beginning and can be controlled
Unplanned Corrective Maintenance: Done if the machine/equipment has been completely dead or in an emergency, so this activity is always urgent and difficult to be controlled which results in a high cost.
Fail-repair: The failed item is restored to its operational state.
Salvage: This element of corrective maintenance refers to the elimination of non-repairable material and the use of material recovered from equipment/items that can not be repaired in the repair, revision or reconstruction programs.
Rebuild: The is the process of restoring the equipment to the original state in performance, life expectancy, and appearance. This is achieved by complete disassembly, repair and replacement of the equipment.
Overhaul: Restoration of an item to its total service status according to maintenance standards, using the “inspect and repair only as appropriate” approach.
Servicing: Servicing may be needed because of the corrective maintenance action, for example, engine repair can lead to crankcase refill, welding on, etc.
Corrective maintenance procedures:
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The machine/equipment damage information is written by the machine operator, using the maintenance request form.
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Once completed and approved by the machining coordinator, then delivered to the maintenance department.
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Based on the report, the maintenance department takes corrective action on the machine / equipment.
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The results of corrective maintenance and corrective maintenance are written on the employment report form and maintenance cost account.
Advantages of Corrective Maintenance:
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Emergency maintenance requirements are reduced.
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Plant availability is increased.
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Losses of downtime are reduced
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Better utilization of plant facilities
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The level of safety is improved and, therefore, there is less chance of accidents.
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Provides enough information about replacement and maintenance repair.