Fundamental Requirements of Effective Preventive/Predictive Maintenance could eliminate almost 98% of the failures. Note the word “proper,” meaning that no new problems are injected. That also means, however, that costs will be higher than need be since components will be replaced before the end of their useful life, and more labor is required. Once the threshold set point has been determined, it should be monitored to detect when it is exceeded. The investment in monitoring depends on the period over which deterioration may occur, means of detection, and benefit value. If failure conditions build up quickly, a human may not. | 14 Fundamental Requirements of Effective Preventive Predictive Maintenance could eliminate almost 98 of the failures. Note the word proper meaning that no new problems are injected. That also means however that costs will be higher than need be since components will be replaced before the end of their useful life and more labor is required. Once the threshold set point has been determined it should be monitored to detect when it is exceeded. The investment in monitoring depends on the period over which deterioration may occur means of detection and benefit value. If failure conditions build up quickly a human may not easily detect the condition and the relatively high cost of automatic instrumentation will be repaid. Lubrication Friction of two materials moving relative to each other causes heat and wear. Friction-related problems cost industries over 1 billion per annum. Technology intended to improve wear resistance of metal plastics and other surfaces in motion has greatly improved over recent years but planning scheduling and control of the lubricating program is often reminiscent of a plant handyman wandering around with his long-spouted oil can. Anything that is introduced onto or between moving surfaces in order to reduce friction is called a lubricant. Oils and greases are the most commonly used substances although many other materials may be suitable. Other liquids and even gases are being used as lubricants. Air bearings for example are used in gyroscopes and other sensitive devices in which friction must be minimal. The functions of a lubricant are to 1 Separate moving materials from each other in order to prevent wear scoring and seizure 2 Reduce heat 3 Keep out contaminants 4 Protect against corrosion 5 Wash away worn materials. Good lubrication requires two conditions sound technical design for lubrication and a management program to assure that every item of equipment is properly lubricated. Fundamental Requirements of Effective Preventive Predictive
