WÄRTSILÄ 31SG, Product Manual

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18.2 Space requirements for maintenance
18.2.1 Working space around the engine
The required working space around the engine is mainly determined by the dismounting dimensions
of engine components, and space requirement of some special tools. It is especially important that
no obstructive structures are built next to engine driven pumps, as well as camshaft and crankcase
doors.
However, also at locations where no space is required for dismounting of engine parts, a minimum
of 1000 mm free space is recommended for maintenance operations everywhere around the
engine.
18.2.2 Engine room height and lifting equipment
The required engine room height is determined by the transportation routes for engine parts. If there
is sufficient space in transverse and longitudinal direction, there is no need to transport engine parts
over the engine and in such case the necessary height is minimized. Separate lifting arrangements
are usually required for overhaul of the turbocharger since the crane travel is limited by the exhaust
pipe. A chain block on a rail located over the turbocharger axis is recommended.
18.2.3 Maintenance platforms
In order to enable efficient maintenance work on the engine, it is advised to build the maintenance
platforms on recommended elevations. The width of the platforms should be at minimum 800 mm
to allow adequate working space. The surface of maintenance platforms should be of non-slippery
material (grating or chequer plate).
18.3 Transportation and storage of spare parts and tools
Transportation arrangement from engine room to storage and workshop has to be prepared for
heavy engine components. This can be done with several chain blocks on rails or alternatively
utilising pallet truck or trolley. If transportation must be carried out using several lifting equipment,
coverage areas of adjacent cranes should be as close as possible to each other.
Engine room maintenance hatch has to be large enough to allow transportation of main components
to/from engine room.
It is recommended to store heavy engine components on slightly elevated adaptable surface e.g.
wooden pallets. All engine spare parts should be protected from corrosion and excessive vibration.
On single main engine installations, it is important to store heavy engine parts close to the engine
to make overhaul as quick as possible in an emergency situation.
18.4 Required deck area for service work
During engine overhaul some deck area is required for cleaning and storing dismantled
components. Size of the service area is dependent of the overhauling strategy chosen, e.g. one
cylinder at time, one bank at time or the whole engine at time. Service area should be plain steel
deck dimensioned to carry the weight of engine parts.
NOTE
Working Platforms should be designed and positioned to prevent personnel slipping,
tripping or falling on or between the walkways and the engine