Maintenance
3103−1/A1
Winterthur Gas & Diesel Ltd.
1/ 3
Measuring Crank Deflection
Tools:
1 Crankshaft equipment (dial gauge) 94305
1 Or a remote gauge
1. General
It is sufficient to measure the crank-web deflection in accordance with the intervals
specified in the class rules. It can be necessary to measure the crank-web deflection
in unusual conditions, for example:
D Important change of crank-web deflection results compared to the data before.
D Bearing temperature alarms, or bearing damage.
D After the primary bearing shells were replaced and again after approximately
100 service hours.
D If the ship has touched the sea bed.
For the examples given above, it is recommended that you speak to Wärtsilä for
support.
2. Preparation
D The indicator valves must be open.
D The ship must float freely in the water as horizontal as possible.
D The crankshaft must be in position on all the main bearings.
The data that follow have an effect when
you measure the crank-web:
D The engine is cold, or has service
temperature.
D The temperature difference between the
lubricating oil sump and the seawater.
D The loaded condition of the ship (the
draught).
D Strong sunshine.
It is recommended that you include these
data in the records.
3. Measurement
WARNING
Injury Hazard: Before you operate the turning gear, make sure
that no personnel are near the flywheel.
Note: Make sure that you turn the flywheel (1, Fig. 1) and pinion (2) in the
correct direction (The arrows show the correct direction.)
Crankshaft
2015
TURNING GEAR
EXHAUST SIDE
WCH02983
1
2
Fig. 1
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