7 семестр (Бормотов А) / 1man_bw_l23_30_chn_23_30_instruktsiya_po_ekspluatatsii / MAN-BW L23-30 (ЧН 225_300)+ / MAN-BW L23-30 H Vol-1 (Instruction)+

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Description

Description

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Description

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Description

This instruction book serves the purpose to provide general information for operation and maintenance, and to describe the design. It can also be used as a reference when ordering spare parts.

Fig. 1 Structure of instruction book.

Reliable and economical operation of the plant is conditional upon its correct operation and maintenance in accordance with MAN B&W Diesel A/S' instructions. Emissions related maintenance of the diesel engine shall be performed as specified in MAN B&W Diesel A/S' instructions and any additional instructions to that effect included in the Technical File. Consequently, it is essential that the engine room personnel are fully acquainted with the contents of this book and, in respect of instructions on emissions related maintenance of the diesel engine, also the additional instructions to that effect set out in the Technical File.

The book is a basic instruction manual for the particular engine supplied, with plant-adapted information such as basic media-system drawings, electrical wiring diagrams and test bed reports.

The first five sections (500-504) of the book serve as a guide to engine operation, and the next fifteen sections (505-519) contain technical descriptions, spare parts illustrations with appurtenant parts lists, as well as working cards.

The last section (520) comprises tools.

The engine is divided into a number of main components/assemblies, each of which is described in a section of this book (section 505-519).

Each of these sections starts with technical descriptions of the systems/components, followed by working cards and the spare parts illustration plates and parts lists.

08028-0D/H5250/94.08.12

Proper maintenance, which is the aim of this book, is a crucial aspect of achieving optimum safety in the engine room. The general measures mentioned here should, therefore, be a natural routine for the entire engine room staff.

Cleanliness

The engine room should be kept clean above and below the floor plates. If grit or sand blows into the engine room while the ship is in port, the ventilation should be stopped and ventilating ducts, skylights, and doors in the engine room should be closed.

In particular, welding or work which causes the spreading of grit and chips must be avoided near the engine, unless this is closed or covered, and the turbocharger air intake filters are covered.

The exterior of the engine should be kept clean and the paintwork maintained, so that leakages can easily be detected.

Fire

If the crankcase is opened before the engine is cold, welding and the use of naked light will involve the risk of explosions and fire. The same applies to inspection of oil tanks and the space below the cooler. Attention should furthermore be paid to the danger of fire when using paint and solvents with a low flash point. Porous insulating material drenched with oil from leakages is easily inflammable and should be renewed. See also: "Ignition in Crankcase" in section 503.

Order

Hand tools should be placed to be easily accessible on tool boards. Special tools should be fastened to tool panels (if supplied) in the engine room close to the area of use. No major objects may be left unfastened, and the floor and passages should be kept clear.

Large spare parts should, as far as possible, be placed well strapped near the area of use and should be accessible by crane. The spare parts should be well-preserved against corrosion and protected against mechanical damage. Stock should be checked at intervals and replenished in time.

Light

Ample working light should be permanently installed at appropriate places in the engine room, and portable working light in explosion-proof fittings should be available everywhere.

Freezing

If there is a risk of damage due to freezing when the plant is out of service, engines, pumps, coolers and pipe systems should be emptied of cooling water.

Warning

Opening of cocks may cause discharge of hot liquids or gases. Dismantling of parts may cause springs to be released.

The removal of fuel valves (or other valves in the cylinder head) may cause oil to run down to the piston crown, and if the piston is hot an explosion may then blow out the valve.

When testing fuel valves with the hand pump do not touch the spray holes, as the jet may pierce the skin. Consider beforehand which way the liquids, gases or flames will move, and keep clear.

Crankcase Work

Check beforehand that the starting air supply to the engine is shut off.

General

Feeling Over

Whenever repairs or alterations have been made to the running gear, apply the "feel-over sequence" until it is ensured that there is no undue heating, oilmist formation, blow-by, or failure of cooling water or lubricating oil systems.

Feel-over Sequence

Feel over after 5-15 and 30 minutes' idle running and finally when the engine is running at full load. See also "Operation" in the section 501.

Turning with Air

After prolonged out-of-service periods or overhaul work which may involve a risk of accumulation of liquid in the combustion spaces, turning should always be effected through at least two complete revolutions.

Check and Maintain

Lubricating oil condition, filter elements and measuring equipment, see "Planned Maintenance Programme".