Parker FG-K17401-KW, Instruction Manual

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MA-K17510-KW LinerSCAN manual ISSUE P.doc Page 63 of 93
The changes to cylinder 2 were carried out immediately, however, due to time constraints cylinder 4
was not changed until the next port. The pictures of the rings and liner surface clearly show the
damage caused by the catalyst fines.
It was understood that the rings on cylinder 4 were not very old and were still bedding in, the
clearances between the rings and liner may be smaller than in normal conditions. This could have lead
to the hard ceramic catalyst fines being forced into the metal surface and cause the scuffing.
Figure 7 Damage to rings and liner caused by catalyst fines
Results like these have been seen on various occasions even when the fuel has come from
scrupulous and respectable sources.
With the introduction of Marpol Annex IV and the Sulphur oxide emission control areas (SECAs), the
use of low sulphur bunker fuels have become mandatory, these fuels are known to have an increased
level of catalyst fines as they require more processing[4]. This may lead to increased engine damage
and part replacement.