Man V8-1200, Installation Instructions Manual

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Engine mounting
18
Choosing suitable resilient mounts
The resilient mounts prevent the transfer of engine vibrations to the engine foundation and ship’s hull.
Due to the design of the engine with respect to:
− Total mass
− Centre of gravity of engine
− Distribution of forces to the engine bases
Several requirements have already been established for the design of the resilient engine mounts.
Depending on the arrangement of engine and gearbox (engine with flange mounted gearbox or a free−-
standing engine and gear box) and the alignment thereof, the following points are also to be taken into
account:
− Propeller force transferred to the engine foundation for engines with flange mounted gearboxes
− Easy height adjustment of the mounts
Due to these various requirements, the resilient mounts must be carefully adapted.
For this reason MAN has developed resilient mounts that are adapted in their design and their shore
hardness to the different types of drive lines.
The following pages gives the assignment of the different resilient mounts to the arrangement of the
engines and gearboxes and detailed information about the mounts.
The resilient mounts are included in the delivery depending on the order. The resilient mounts should
always be used. In no case should the engine be installed on the foundation without them.
Note:
The resilient engine mounts cannot compensate for vibrations caused by inadequate alignment of
the drive line or by vibrations from the propeller.