solved by applying a so-called key-slot solution with the aim of increasing
the radial forces pressing the bearing shell into the girder, and by
some other small design modifications. With the exception of one
particular main bearing, no connection could be found with the bearing
load and shaft orbit that could explain the breaking-out problem. As
a countermeasure, the lower shell of the main bearing next to the
thrust bearing is now machined together with its respective bearing
cap to ensure better bearing geometry. The more precise alignment
of the bearing cap and shell, along with a key between the cap and
shell to secure tight fitting of the shell in the bearing girder when
tightening down, gradually yielded results.