Maintenance
3130−2/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 2
Key to Illustrations:
1 Damper casing 6 Coupling bolt
2 Vent nozzle 7 Coupling disc
3 Sealing ring (crank angle sensor unit)
4 Oil supply piping 8 Vibration damper
5 Crankshaft 9 Sealing ring
1. General
Depending on the design execution of an engine, a vibration damper of GEIS-
LINGER make may be mounted at the free end of the crankshaft.
The service life of a vibration damper depends largely on the speed range in which
the engine is operated. Water, in particular sea-water, in the lubricating oil leads to
increased wear and loss of damping action.
2. Check
D The engine filters should regularly be checked for steel or bronze chippings. If
such chippings are found also in the damper housing, the damper supplier is
to be informed accordingly.
Until the reasons for such findings are not clarified and rectified, it is not allowed to
put the damper back into service.
D Should the oil pressure drop below 1 bar, it may not be corrected by adjust-
ment of the adjustable throttle in the supply piping. Instead, the cause of the
pressure drop must be investigated (defective oil supply piping 4).
Attention! If the oil supply to the damper is interrupted, the engine must be
stopped immediately, otherwise the damper may be seriously damaged. The oil
supply has to be reestablished before restarting the engine.
D Should damage be noticed on the engine bearings which is due to water con-
tamination of the lubricating oil, then the vibration damper must also be in-
spected for possible damage at the very earliest opportunity.
D To check the inner spring tips and groove flanks the inspection cover on the
face of damper casing 1 (Fig. ’B’) can be removed (with stopped engine). For
wear limits refer to the manual of the damper manufacturer.
D Dismantling of a vibration damper should only take place if there is a reason-
able suspicion that the damper is damaged or wear rates have exceeded their
limits. In this case contact the damper manufacturer for further instructions.
Attention! Adjustments on the vibration damper may only be carried out by a spe-
cialist, with simultaneous torsional vibration measurements.
Prior to removing a vibration damper and balance weight mark their positions with
reference to the crankshaft.
D For tightening values of coupling bolts 6 see 0352−1.
Remark: For the test run after the first commissioning, as well as the normal
checking and servicing intervals, refer to the manual of the damper manufacturer.
Contact address for GEISLINGER vibration dampers:
Geislinger GmbH
A-5300 Hallwang / Salzburg
Austria
ibration Damper
nspection (GEISLINGER Vibration Damper)
2010
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