WÄRTSILÄ 41508, Инструкция по эксплуатации

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10.2.2 Inspection of main bearings and journals
Clean the bearing shells and check for wear, scoring and other dam-
ages.
a) Trimetal bearings
can be used unt il the overla y is par tia lly worn off.
When t he un der-la ying n ickel-ba rr ier or t he lining ma teria l is exposed
in an y a rea, th e bearing must be replaced.
Never re-install a bearing with the nickel-barrier exposed in any
part of the bearing shell.
b) Bi-metal bearings.
Wear is settled by measuring the thickness of
th e low er bearing shells. For t his purpose a ball a nvil micrometer ca n
be used. The w ear limit in section 06.2 must be a pplied. If t he th ickness
of lower bearing shells have not reached the wear limit and the
difference in th ickness of a ll low er bear ing shells is ma x. 0.03 mm, t he
shells ca n be used a ga in.
Mark the new bearings with the bearing numbers.
The ma in bear ing journ a ls should be inspected for surfa ce finish. D a m-
a ged journa ls, i.e. rough sur fa ce, scra tches, ma rks of shocks etc., should
be polished. If, a fter a longer run ning period, considera bly uneven w ear
a ppears, section 06.2, th e cra nksha ft ma y be reground a nd used t ogether
w ith th icker bearing shells, see Spa re Pa rt s Ca ta logue.
No scra ping or oth er dam a ge of bea ring shells, ca ps and sa ddles is
a llow ed. B urr s should be locally removed, only.
10.2.3 Assembling of main bearing
1 Clean the main bearing shells,
the cap and the journal very
carefully.
2 Take off the protecting tape from the journal oil holes and
lubrica te t he journa l wit h clean engine oil.
3 Lubricate the bearing surface, ba ck side a nd end fa ces of the
upper bear ing shell with clean lubricat ing oil.
The bearing shell can be completely destroyed (deformed) during
the assembly, if it is not lubricated carefully.
Engine Block with Bearings, Cylinder and Oil Sump 34SG-9701