Winterthur Gas X40-B, Maintenance Manual

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Maintenance
3103 − 1/A1
Winterthur Gas & Diesel Ltd.
1/ 3
Crankshaft
Crank Deflection − Measure
Tools:
1 Crankshaft equipment (dial gauge) 94305
1. General
It is sufficient to regularly measure the crank-web deflection in accordance with the
intervals given in the class rules. In the conditions that follow, it can become
necessary to measure the dimensions:
D
Important change of crank-web deflection results compared to the set of previous
results.
D Temperature alarms of bearings, or damage to bearings.
D
After the main bearing shells are replaced and again after approximately
100 service hours.
D If the ship has touched the sea bed.
In such conditions, it is recommended that you speak to Wärtsilä.
The crankshaft equipment (94305) is held between the crank webs in the center
punch marks. When the crankshaft turns, the change in distance between the crank
webs can be read from the dial gauge. This shows the distance the crank web has
opened or closed. The smaller the difference the better the crankshaft is aligned. But,
you must think about the function of the crankshaft equipment, i.e. the signs on the
dial gauge + (standard) − .
2. Conditions to Measure
The conditions to measure crank-web deflection are as follows:
D The indicator valves must be open.
D
The ship must be floating freely in the water as horizontal as possible.
D The crankshaft must touch all the main bearings.
The conditions that follow will have an effect
when you do the procedure to measure the
crank-web deflection:
D The engine is cold or at service
temperature.
D The difference in temperature between
the lubricating oil sump tank and the
seawater.
D The loaded condition of the ship (the
draught).
D Strong sunshine.
It is recommended the you include these
data in the records.
3. Procedure
Note: During the procedure, the flywheel
(1, Fig. 1 ) and pinion (2) of the
turning gear must turn in the
directions shown.
2016
Fig. 1
2
1
WCH03623
TURNING GEAR
ON EXHAUST
SIDE