According to R. Lindley Higgis & R. Keith Mobley, perwatan / maintenance is an activity that is conducted repeatedly with the goal of keeping the equipment always has the same conditions with the original state. Maintenance or maintenance was also carried out to ensure that the equipment remains in a condition acceptable to the consumer. Effective maintenance will lead to the following matters:
a. Capacity work optimally fulfilled
b. Ability to produce work with a specific tolerance or a certain quality level.
c. Can minimize the cost per unit of work.
Figure 1. Atmosphere workshop
d. Can reduce the risk of failure to meet the customer’s wishes with regard to the working capacity and quality of the work. e. Can maintain the safety of employees, the working environment and the surrounding communities of the dangers that may arise with the work process.
f. Can ensure the least possible risks that could endanger the environment surrounding the workshop / factory.
Planned maintenance
Porses maintenance planned maintenance is regulated and organized to anticipate the changes that occur to the equipment in the future. Planned maintenance contained in the instrument control and instrument recording in accordance with a predetermined plan. Is part of a planned maintenance instrument maintenance management consisting of preventive maintenance, predictive maintenance and corrective maintenance.
Preventive maintenance is the maintenance performed at specified intervals and implementation is done routinely with some of the instrument carried out previously. The goal is to prevent and reduce the likelihood of a component does not meet the normal conditions. Work done in preventive maintenance is to check, view, adjust, calibrate, lubricate, and other work that is not a replacement of parts by weight.
Preventive maintenance helps to keep the equipment can work well in accordance with what the provisions of the manufacturer. All work included in the scope of preventive maintenance is done routinely with the performance of the tool is based on the results obtained from predictive maintenance work or the recommendation of the manufacturer of the device. If preventive maintenance is managed properly then it will be able to provide information about when the machine will be replaced in part or tool components.
Routine maintenance is done by a certain time interval instruments is based on a matter of months, days or hours. An interval of days or months are recorded as: instrument 1 month = 1 B, 3-month = 3 B, 6 months = 6 B or 120,000 hours of instrument time, 5,000 hours or 1,000 hours. Date maintenance work recorded on board the instrument is placed in the chamber in charge and the recording date of the work done also on the equipment data sheets.
Information recorded included time to use the tools, parts replaced and equipment performance. From the recorded data can be projected and predictable tool life times, so it can be planned to replace it at the appointed time. Before instruments planned maintenance applied, should know what equipment is already there and how much. For that, work can begin with a complete inventory list to answer the question above.
It is a key requirement and deserve to be a first task to prepare a good instrument maintenance. List of accurate and detailed inventory of technical terms will be very useful for planned maintenance instrument. Furthermore, an inventory of the equipment is grouped into several groups according to its kind. For example: a group of hand tools, special tools (Special service tool / SST), measuring tools and so on.