Bergen Crankshaft Replacement on AHTS Offshore Supply Vessel

MAIN ENGINE: BERGEN B32:40L8P

Goltens was engaged by Rolls Royce to inspect the damage on a Bergen B32:40L8P crankshaft onboard an Anchor Handling Tug (AHTS) in Vung Tau, Vietnam.

As the maximum undersize for the crankshaft in -2.00mm, the shipowner decided to proceed with the replacement of the crankshaft on the recommendation of the maker.

PLANNING AND PREPARATION:

Goltens created a work procedure and schedule for the replacement of the crankshaft that was reviewed and approved by the maker and owner. Goltens then manufactured the tools required to lift the engine block and removed the condemned shaft, counterweights, pistons and connecting rods to Goltens workshop.

In the workshop, Goltens technicians refit the flywheel and damper to the new crankshaft and performed contact tests between the counterweights and the shaft. In addition, Goltens completed calibration checks and overhauled all pistons and connecting rods, replacing the two damaged connecting rods with onboard spare.

CRANKSHAFT REPLACEMENT AND REBUILD:

All components were packed and prepared for transfer back to the vessel where preparations to rig and install the new crankshaft had already been made. Once rigged into the engine room, Goltens installed the crankshaft and rebuilt the engine with the overhauled components.