Actually, more correctly, the subject is the three phases of maintenance.

The most obvious phase of maintenance is the repair function. Very simply stated, this means, "if it breaks, fix it." This is actually the third phase and means exactly what it says. It is a last resort and should arise only at infrequent intervals.

The converse of the above is not true. "If it ain't broke, don't fix it," is the beginning of many problems. Phases one and two require "fixing" what isn't broken.

Phase one is systematic daily maintenance. The machine operator is usually responsible for this part. He/she simply cleans the equipment, observing anything out of the ordinary and reporting it to the maintenance department.

This allows replacement of parts about to malfunction thus preventing chaining of problems.

Phase two is the regularly scheduled maintenance to include changing of fluids, thorough cleaning of parts not normally seen by the operator and a more detailed inspection for parts about to malfunction. This would include parts that are bent or broken, to include any possible cracks, obvious wear and signs of lack of lubrication.

It can readily be seen that proper performance of phases one and two will greatly reduce the occurrence of phase three, breakdown repair.

The greatest incentive for performing phases one and two regularly is that machine breakdown will invariably occur when the machine is used, and most often when it is being used most heavily. A machine that is idle simply doesn't break down.