This article attempts to detail the traditional division into types of maintenance, noting that this division, apart from a simple academic concept or training purposes, it is not more useful. It is not possible to determine that a particular machine, the type of maintenance to be applied is one of the traditional corrective, scheduled, predictive, etc. It is more practical to apply another concept: the maintenance model. Different models of maintenance defined as a mixture of different types of maintenance in the proportions necessary for each equipment. Types of maintenance.
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A spare part , spare , service part , repair part , or replacement part , is an interchangeable part that is kept in an inventory and used for the repair or replacement of failed units. Spare parts are an important feature of logistics engineering and supply chain management , often comprising dedicated spare parts management systems. Capital spares are spare parts which, although acknowledged to have a long life or a small chance of failure , would cause a long shutdown of equipment because it would take a long time to get a replacement for them.
Spare parts are an outgrowth of the industrial development of interchangeable parts and mass production. In logistics , spare parts can be broadly classified into two groups, repairables and consumables. Economically, there is a tradeoff between the cost of ordering a replacement part and the cost of repairing a failed part.
When the cost of repair becomes a significant percentage of the cost of replacement, it becomes economically favorable to simply order a replacement part. In such cases, the part is said to be "beyond economic repair" BER , and the percentage associated with this threshold is known as the BER rate. Repairable parts are parts that are deemed worthy of repair, usually by virtue of economic consideration of their repair cost.
Rather than bear the cost of completely replacing a finished product, repairables typically are designed to enable more affordable maintenance by being more modular. That allows components to be more easily removed, repaired, and replaced, enabling cheaper replacement. Spare parts that are needed to support condemnation of repairable parts are known as replenishment spares. A rotable pool is a pool of repairable spare parts inventory set aside to allow for multiple repairs to be accomplished simultaneously, which can be used to minimize stockout conditions for repairable items.
Parts that are not repairable are considered consumable parts. Consumable parts are usually scrapped , or "condemned", when they are found to have failed. Since no attempt at repair is made, for a fixed mean time between failures MTBF , replacement rates for consumption of consumables are higher than an equivalent item treated as a repairable part.
Therefore, consumables tend to be lower-cost items. Because consumables are lower cost and higher volume, economies of scale can be found by ordering in large lot sizes, a so-called economic order quantity. There is no UK or EU legislation which states that spare parts have to be available for any set period of time,  but some trade associations require their members to ensure products are not rendered useless because spare parts are not available.
From the perspective of logistics , a model of the life cycle of parts in a supply chain can be developed. This model, called the repair cycle, consists of functioning parts in use by equipment operators, and the entire sequence of suppliers or repair providers that replenish functional part inventories, either by production or repair, when they have failed.
Ultimately, this sequence ends with the manufacturer. This type of model allows demands on a supply system to ultimately be traced to their operational reliability , allowing for analysis of the dynamics of the supply system, in particular, spare parts.
When stockout conditions occur, cannibalization can result. This is the practice of removing parts or subsystems necessary for repair from another similar device, rather than from inventory. The source system is usually crippled as a result, if only temporarily, in order to allow the recipient device to function properly again.
As a result, operational availability is impaired. Industrialization has seen the widespread growth of commercial manufacturing enterprises, such as the automotive industry , and later, the computer industry. The resulting complex systems have evolved modular support infrastructures, with the reliance on auto parts in the automotive industry, and replaceable computer modules known as field-replaceable units FRUs. Military operations are significantly affected by logistics operations. The system availability, also known as mission capable rate , of weapon systems and the ability to effect the repair of damaged equipment are significant contributors to the success of military operations.
Because of this sensitivity to logistics, militaries have sought to make their logistics operations as effective as possible, focusing effort on operations research and optimal maintenance. Maintenance has been simplified by the introduction of interchangeable modules known as line-replaceable units LRUs. LRUs make it possible to quickly replace an unserviceable failed part with a serviceable working replacement. This makes it relatively straightforward to repair complex military hardware, at the expense of having a ready supply of spare parts.
The cost of having serviceable parts available in inventory can be tremendous, as items that are prone to failure may be demanded frequently from inventory, requiring significant inventory levels to avoid depletion. For military programs, the cost of spare inventory can be a significant portion of acquisition cost.
In recent years, the United States Department of Defense DoD has advocated the use of performance-based logistics PBL contracts to manage costs for support of weapon systems. From Wikipedia, the free encyclopedia. For other uses, see Spare Parts disambiguation. Main article: Repairable. Main article: Consumables. Main articles: Logistic engineering and Supply chain management. Main article: Cannibalization parts. Main article: Military logistics.
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Ecolab Parts. Ecolab is classified under laboratories and has been in business for 10 or more years. Share How to Buy. Contrinex Inductive and Photoelectric Sensors use single-piece metal housing, which makes them practically indestructible. Ecolab is a public business and is considered small. They help ensure optimal results at the lowest overall cost.
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An original equipment manufacturer OEM is a company that purchases parts and equipment that may be manufactured by another company. The term is also used in several other ways, which causes ambiguity. It sometimes means the maker of a system that includes other companies' subsystems, an end-product producer, an automotive part that is manufactured by the same company that produced the original part used in the automobile's assembly, or a value-added reseller. When referring to auto parts, OEM refers to the manufacturer of the original equipment, that is, the parts assembled and installed during the construction of a new vehicle.
General building contractors who combine a special trade with the contracting are included in this major group. Specialized activities that are covered here include grading for highways and airport runways; guardrail construction; installation of highway signs; trenching; underwater rock removal; and asphalt and concrete construction of roads, highways, streets and public sidewalks. Establishments primarily engaged in specialized activities that may be performed on buildings or on other heavy construction projects are classified in Major Group These include contractors primarily engaged in painting including bridge painting and traffic lane painting , electrical work including work on bridges, power lines, and power plants , and carpentry work. These activities include painting including bridge painting and traffic lane painting , electrical work including work on bridges, power lines, and power plants , carpentry work, plumbing, heating, air-conditioning, roofing, and sheet metal work. Special trade contractors primarily engaged in activities that are clearly of a type specialized to heavy construction, such as grading for highways and airport runways; guardrail construction; installation of highway signs; underwater rock removal; and asphalt and concrete construction of roads, highways, streets, and public sidewalks are classified in Major Group Special trade contractors may work on subcontract from the general contractor, performing only part of the work covered by the general contract, or they may work directly for the owner. Special trade contractors for the most part perform their work at the site of construction, although they also may have shops where they perform work incidental to the job site. This classification makes no distinction between the two types of organization which operates in the textile industry: 1 the integrated mill which purchases materials, produces textiles and related articles within the establishment, and sells the finished products; and 2 the contract of commission mill which processes materials owned by others. Converters or other nonmanufacturing establishments which assign materials to contract mills for processing, other than knitting, are classified in nonmanufacturing industries; establishments which assign yarns to outside contractors or commission knitters for the production of knit products are classified in Industry Group
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In cases where these groupings correspond with major groups, the major group heading is also in italics. The assembly of products from component parts is considered to be Manufacturing, except in cases where the activity is appropriately classified under Construction. The assembly and installation of machinery and equipment in mining, manufacturing, commercial and other business establishments is classified under the same group of Manufacturing as the manufacture of the item installed. Excluded is the assembly on site of prefabricated, integral parts of bridges, water tanks, storage and warehouse facilities, railway and elevated pedestrian bridges, and lift, escalator, plumbing, sprinkler, central heating, ventilating, air-conditioning, lighting and electrical wiring systems for buildings and mines and all kinds of structures which are construction activities if undertaken as a specialised activity. Establishments specialising in the installation of household appliances, such as stoves and ranges, refrigerators, washing machines and driers, are classified under the appropriate retail trade group. The manufacture of specialised components and parts of and accessories and attachments to machinery and equipment is, as a general rule, classified under the same group as the manufacture of the machinery and equipment for which the parts and accessories are intended. However, the making of specialised components and accessories by moulding or extruding plastic materials is included in subgroup Manufacture of plastic products. The manufacture of unspecialised components and parts of machinery and equipment, e. The classification of repair work is discussed in detail in the introduction to this manual.
The Association for the Work Truck Industry represents more than 2, companies that manufacture, distribute, install, sell and repair commercial trucks, truck bodies, truck equipment, trailers and accessories. We offer our asphalt hot boxes in many different sizes. Prove your hypothesis for fun at Scientifics Online.
Jet Elec- tronics tachometers may be substituted for Mitchell Tacho- meters according to availability. Rotax with only 23 hours since complete overhaul in by South Mississippi Light Aircraft, B gearbox, clear coated sails, steerable nose wheel, tail brace kit, Matco hydraulic brakes with new calipers and shoes, Warp Drive 3 blade adjustable pitch prop , full instrumentation, ELT, 12 gallon fuel tank , stainless exhaust. Mitchell tachometer was the recommended replacement.
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A spare part , spare , service part , repair part , or replacement part , is an interchangeable part that is kept in an inventory and used for the repair or replacement of failed units. Spare parts are an important feature of logistics engineering and supply chain management , often comprising dedicated spare parts management systems. Capital spares are spare parts which, although acknowledged to have a long life or a small chance of failure , would cause a long shutdown of equipment because it would take a long time to get a replacement for them. Spare parts are an outgrowth of the industrial development of interchangeable parts and mass production.