Maintenance
1132−2/A1
Winterthur Gas & Diesel Ltd.
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5. Main Bearing Shell − Inspection
1) Use a soft cloth to clean the bearing shell.
2) Do a check of the bearing shell for damage e.g. breakouts or cracks.
3) Use Scotchbrite to remove small scratches and running marks.
CAUTION
Damage Hazard: Do not use a scraper in the running area of the
bearing shell. Damage to the bearing shell will occur.
4) If the running marks are not symmetrical (axial or radial) speak to, or send a
message to Wärtsilä Service.
5) Replace the bearing shells if necessary.
6) Do an inspection of the surface of the bearing pin. If necessary, repair the surfaces
that have scratches.
6. Main Bearing Shell and Bearing Cover − Installation
The bearing shells and bearing covers have the marks DRIVING END and must be
installed in the bearing girder in their initial positions.
Before installation, make sure that the items that follow are clean and in good
condition:
D All tools
D The crankshaft pin
D The girder bore for the bearing shell
D Bearing shells.
CAUTION
Damage Hazard: Use only the applicable tools for installation. The
sizes of the bearing shells are different (narrow and wide).
6.1 Bearing Shells − Installation
1) Apply a very thin layer of Molykote paste G to the rear face of the bearing shell.
2) Make sure that the crankshaft pin and the running surface of the bearing shell are
clean and fully lubricated with the clean engine oil.
Note: The bearing shells have different dimensions. For bearing shell No. 1, use
the dismantling tool 94118B and the lifting plate 94119. For bearing shells
No. 2 to No 8 use the dismantling tool 94119C and the lifting plate 94119A.
3) Attach the lifting tool 94116A to the bearing shell.
4) Use the applicable equipment as follows:
D For the bearing shell No.1, use the engine room crane and the spur-geared
chain block H2 to lower the bearing shell in position on to the crankshaft.
D For the bearing shells No.2 to No. 8, use the spur geared chain blocks H3,
H4, the roller support 94117A and the manual ratchet H1 to lower the the
bearing shell in position on to the crankshaft.
5) On the fuel side of the bearing shell, put the lifting plate 94119 in position.
6) Put the ropes of the dismantling tool 94118B below the crankshaft pin and connect
them to the lifting plate 94119.
7) Remove the lifting tool 94116A.
2015
Main Bearing − Removal and Installation
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