In December 2024, RA Power Solutions successfully repaired a Himsen Hyundai 6H17/28 crankshaft on a vessel anchored at MIP Mersin, Turkey. The Italian-owned ship experienced a major breakdown in one of its auxiliary engines due to lubricating oil pump failure, which damaged all connecting rod bearings. Upon inspection, technicians found bearing material embedded in all six crankpins, with taper and ovality measurements ranging from 0.22 mm to 0.86 mm. Technicians also detected minor hairline cracks. Using in situ crankshaft grinding equipment, the team reduced the diameters of the crankpins by 1.00 mm to 1.50 mm, restoring them to operational standards.
The collage above offers a comprehensive visual guide to the crankshaft repair and restoration process.
For a comprehensive overview of a similar repair, check out our latest blog post: Himsen Hyundai 6H17/28 Crankshaft Repair in Turkey.
FAQs
The breakdown was due to a lubricating oil pump failure, which damaged the connecting rod bearings. And led to embedded bearing material on all six crankpins.
Before repair, taper and ovality on the crankpins ranged from 0.22 mm up to 0.86 mm, indicating significant wear and distortion.
RA Power Solutions operated in situ crankshaft grinding equipment directly aboard the vessel at MIP Mersin. And enabling them to grind and polish the crankpins without removing the shaft.
Our technicians ground down three crankpins by 1.00 mm to a final diameter of 174.00 mm. While they reduced the other three by 1.50 mm to reach 173.50 mm.
Yes. After grinding, all six crankpins achieved diameters with ovality within 0.02 mm, meeting OEM dimensional tolerances.