SL2016-627/MIKA Tightening of Roller Guide Housing

MAN Diesel & Turbo has received reports of incidents of the roller guide housing in service. Such incidents often lead to consequential damage to the frame surface on which the housing is fixed.

The root cause of these incidents is the bolt connection between the housing and frame. Our investigation revealed that bolts were touching the bottom of the threaded holes, leading to improper fastening of the housing and eventually an incident.
These incidents have occurred in service due to an incorrect combination of the bolt connection.
We have experienced variation in flange thickness, bolt length and size of washers from various makers and suppliers..