IN CASE OF BEARING FAILURE, WE NEED TO REPLACE THE BEARING WITH THE NEW ONE. BUT THIS REQUIRE TIME AND THE SHIP SHOULD BE IN A SAFE LOCATION WHERE YOU CAN IMMOBILIZE THE SHIP FOR SOME PERIOD OF TIME. THE ENGINE THOUGH MAY BE RUN BY LOWERING THE LOAD ON THE BEARING. THIS IS DONE BY STOPPING THE COMBUSTION.
TO STOP THE COMBUSTION THE FUEL MUST BE CUT OFF BY LIFTING THE ROLLER UP FROM THE CAM.
AS THE COMBUSTION IS NO MORE THE LOAD ON THE BEARING WILL BE REDUCED. THE EXHAUST VALVE , LUBRICATION TO CONNECTING ROD AND CROSSHEAD, STARTING AIR ETC WILL BE FUNCTIONING NORMALLY. ATHE PISTON, CONECTING ROD AND OTHER MOVING PARTS WILL ALSO BE WORKING NORMALLY.