Preventive Maintenance Essential Care and Condition Monitoring (PM/ECCM) Definitions
Preventive Maintenance is essential care and fixed time maintenance together. Both essential care and fixed time maintenance PREVENTS (both prevent) FAILURES, while Conditions Monitoring only DETECTS FAILURES EARLY.
Essential Care is a compilation of processes that will prevent failures from occurring. For example lubrication, alignment, balancing, cleaning, and operating procedures, adjustments and installation procedures. Essential Care prevents failures (prolong life of equipment).
Fixed Time Maintenance is sometimes selected for equipment with a known life. The equipment is replaced periodically on a fixed time interval. Fixed time maintenance prevents failures from occurring (without prolonging life)
Objective condition monitoring is preferred over subjective condition.
Objective methods are, for example, vibration anaylsis, ultrasonics, and temperature, pressure, voltage, ampere readings.
Subjective inspections are look, listen, feel, and smell.