Maintenance
0330−1/A1
RT-flex50-D
Wärtsilä Switzerland Ltd
1/ 25
Overview
− General 1/25..............................................
− Crankshaft and Thrust Bearing 2, 3/25......................
− Crankshaft and Main Bearing 4, 5/25........................
− Crosshead Guide 6, 7/25...................................
− Cylinder Liner 8, 9/25......................................
− Piston Rod Gland 10, 11/25.................................
− Exhaust Valve 12, 13/25....................................
− Top and Bottom End Bearings to Connecting Rod 14, 15/25...
− Piston Cooling and Crosshead Lubricating Link 16, 17/25.....
− Piston and Piston Rings 18, 19/25...........................
− Driving Wheels for Supply Unit 20, 21/25....................
− Supply Unit 22, 23/25.......................................
− Fuel Pump 24, 25/25........................................
1. General
The clearances listed in the column ’Nominal dimension’ of the following table cor-
respond to design and manufacturing values or to the settings on the new engine.
The values listed in the column ’Maximum clearance, dimension’ are such values
as may be reached after a lengthy operating period, which however may not be
allowed to be exceeded or fall below. On components where the clearance is ad-
justable by modifying the thickness of shims, discs, spacers etc. the value given as
’Normal Clearance’ should always be arrived at, or striven to attain. Where this is
not possible, worn parts must be replaced by standard new ones or reconditioned
by suitable material buildup.
If, during an overhaul, clearances are measured which have almost reached the
permissible limit, it must be left to individual judgement to decide whether a compo-
nent part should be replaced or remain fitted till the next overhaul. This depends for
example on the duration of the next operation period till the next overhaul and what
wear has to be expected based on experience gained.
learance Table
2010
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