When a six year old bulk carrier suffered main bearing failures on its Japanese-made main engine, QuantiServ was called in for an initial inspection and for discussions on how to arrange the repair in the fastest and most economical way. The inspection in Veracruz, Mexico, showed that main bearings # 7 and 8 failed and that the crankshaft as well as the main bearing pockets were damaged.
The crankshaft was beyond repair and had to be replaced by a new one. The bed plate, on the other hand, could be recovered by line boring. With the engine frame lifted up, QuantiServ’s in-situ specialists carried out
- a thorough inspection of the bedplate, including NDT crack detection and hardness measurements
- laser alignment checks before line boring
- line boring of main bearing pockets # 7 and 8
- laser alignment checks after line boring
- blueing checks
The work was carried out successfully while the vessel was alongside in the shipyard in Mexico.