WinGD RT-flex50DF, Maintenance Manual, Page: 109 / 586

Maintenance
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Winterthur Gas & Diesel Ltd.
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5. Main Bearing Shells − Inspection
CAUTION
Damage Hazard: Do not use a scraper in the running area of the
bearing shell. Damage to the bearing shell can occur.
1) Use a soft cloth to clean the bearing shell.
2) Do a check the bearing shell for damage such as breakouts or cracks.
3) Use Scotchbrite
t
to remove light scratches and running marks.
4) If the running marks are not symmetrical (axial or radial) speak to, or send a
message to Wärtsilä Services Ltd.
5) If necessary, replace the bearing shells.
6) Do an inspection of the surface of the bearing pin. if necessary, repair the
surfaces that have scratches.
6. Bearing Shell and Bearing Cover − Installation
CAUTION
Damage Hazard: Use only the applicable tools for installation. The
sizes of the bearing shells are different (narrow and wide).
The bearing cover and bearing shell have the marks DRIVING END and must be
installed correctly 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.
6.1 Bearing Shell − Installation
1) Apply a very thin layer of Molykote paste G to the rear face of the bottom bearing
shell before each installation.
2) Make sure that the crankshaft pin and the running surface of the bearing shell are
clean and fully lubricated with clean engine oil.
Note: The bearing shells have different dimensions. For bearing shell No. 1, use
the equipment shown in Fig. 11 , Fig. 12 and Fig. 13 . For bearing shells
No. 2 to No. 8, use the equipment shown in Fig. 14 , Fig. 15 and Fig. 16 .
3) Attach the transportation tool (94116A) to the bearing shell and the applicable
manual ratchet.
4) Lower the bearing shell into position on the crankshaft. Make sure that each end
of the bearing shell does not touch the bearing girder.
5) Put the ropes of the turning-out device (94118A) below the crankshaft and
connect it to the device (94119B).
6) Remove the transportation tool 94116A.
7) Carefully move the bearing shell into the bearing girder on the fuel side.
8) Carefully put the Allen screws into the bearing shell.
9) Release the pressure from the HP oil pump (94931) to fully lower the crankshaft.
10) Remove the hydraulic jacks (94936) and the HP oil pump (94931).
Main Bearing − Removal and Installation
2016