WÄRTSILÄ 46F Series, 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. Additional space is required for maintenance personnel
operations.
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 rocker arm covers or over the exhaust pipe 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).
Recommended height of the maintenance platforms are shown in figures 18-1 and 18-2 .
NOTE
Working Platforms should be designed and positioned to prevent personnel slipping,
tripping or falling on or between the walkways and the engine
18.3 Transportation and storage of spare parts and tools
Transportation arrangements from engine room to workshop and storage locations must be
provided for heavy engine components, for example by means of several chain blocks on
rails, or by suitable routes for trolleys.
The engine room maintenance hatch must be large enough to allow transportation of all main
components to/from the engine room.
It is recommended to store heavy engine components on a slightly elevated and adaptable
surface, e.g. wooden pallets. All engine spare parts should be protected from corrosion and
excessive vibration.
18.4 Required deck area for service work
During engine overhaul a free deck area is required for cleaning and storing dismantled
components. The size of the service area depends on the overhaul strategy , e.g. one cylinder
at time or the whole engine at time. The service area should be a plain steel deck dimensioned
to carry the weight of engine parts.
DAAB605814 18-7
18. Engine Room Layout Wärtsilä 46F Product Guide