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We have been assigned by the supervisor to go under the maintenance department to follow their

preventive maintenance schedule.

Preventive Maintenance

Preventive maintenance is a schedule of planned maintenance actions aimed at the prevention of

breakdowns and failures. The primary goal of preventive maintenance is to prevent the failure of

equipment before it actually occurs. It is designed to preserve and enhance equipment reliability

by replacing worn components before they actually fail. Preventive maintenance activities

include equipment checks, partial or complete overhauls at specified periods, oil changes,

lubrication and so on. In addition, workers can record equipment deterioration so they know to

replace or repair worn parts before they cause system failure. Recent technological advances in

tools for inspection and diagnosis have enabled even more accurate and effective equipment

maintenance. The ideal preventive maintenance program would prevent all equipment failure

before it occurs.

Value of Preventive Maintenance

There are multiple misconceptions about preventive maintenance. One such misconception is

that PM is unduly costly. This logic dictates that it would cost more for regularly scheduled

downtime and maintenance than it would normally cost to operate equipment until repair is

absolutely necessary. This may be true for some components; however, one should compare not

only the costs but the long-term benefits and savings associated with preventive maintenance.

Without preventive maintenance, for example, costs for lost production time from unscheduled

equipment breakdown will be incurred. Also, preventive maintenance will result in savings due

to an increase of effective system service life.

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Long-term benefits of preventive maintenance include:

y Improved system reliability.y Decreased cost of replacement.y Decreased system downtime.y Better spares inventory management.

Long-term effects and cost comparisons usually favor preventive maintenance over performing

maintenance actions only when the system fails.

I followed the technicians during their checking on equipments where I have been introduced

practically to the ways and skills of how to identify the defects within that the equipment.

There are many pumps of different kind in the plant especially in the glycerin plant so most of

our preventive maintenance was in the glycerin plant to check on the bearings as well as the oil

level and the mechanical seal of each pump.

Centrifugal pump

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After opening this centrifugal pump there was wrong with the bearing because there was already

sound coming out of the pump so we replaced the damaged bearings and we greased the

mechanical seal and we assembled again.

After assembling the centrifugal pump we did check for the rest pumps in the glycerine plant where we

checked the mechanical seal , a mechanical seal is a device which helps join systems or mechanisms

together by preventing leakage (e.g., in a plumbing system), containing pressure, or excluding

contamination. A seal may also be referred to as "packing."The mechanical seal acts as a check valve and

a slider bearing. The obvious function is that of a check valve to prevent liquid under pressure from

leaking out of the pump, or from drawing air into the pump when under vacuum conditions.

Centrifugal pump

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ASSEMBLY PARTS OF MECHANICAL SEAL MECHANICAL SEAL ASSEMBLED

Pumps in glycerin plant

Pumps in glycerin plant

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After we checked the pumps we went to the saponification plant to check the centrifugal

separator we disassembled it. The centrifugal separator used to ensure that the soap is mixed

100% ,we opened the centrifugal separator twice ,once when there was electric error in which

the coil of the dynamo need to be checked and the next time when the base of the centrifugal

separator was not stable in which it needed welding.

Centrifugal separator

Centrifugal separator

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After we finished with the centrifugal separator maintenance, we went to soap line 2 to check AGMA

MACHIENE 2 where we disassembled the AGMA MACHIENE 2 to clean and check on the bolts and

rollers .it took us four days to disassemble and do the necessary actions and assemble it again.

Overview for soap plant

Centrifugal separator

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After I followed the technicians for three weeks I was introduced to the mechanical life practically in

which I was able to implement the theories that I have been taught in the university in the real life

where I have been introduced to all different kind of pumps ,bearings ,mechanical seals, and gears .