Wartsila ?31DF 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.
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).
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 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.
DBAE248994 18-5
18. Engine Room Layout Wärtsilä 31DF Product Guide