Daihatsu 8DK32 Crankshaft Repair While Sailing | Nhava Sheva to Mundra Port

                                                                                      Daihatsu 8DK32 Auxiliary Engine

A reputed shipping company from Greece approached RA Power Solutions following the failure of a crankpin of DG No. #04 of a Daihatsu 8DK32 auxiliary engine. The vessel was scheduled to sail from Nhava Sheva Port (Mumbai) to Mundra Port (Gujarat). To avoid off-hire time, the repair was required to be carried out while the vessel was sailing.

Recognizing the critical nature of the situation, RA Power Solutions immediately mobilized its experienced technicians along with an advanced onsite crankshaft grinding machine to execute the repair safely, accurately, and within the voyage schedule.

The major crankshaft details of the Daihatsu 8DK32 are as follows:

Crankshaft Inspection by MPI – Daihatsu 8DK32 Auxiliary Engine	Magnetic Particle Inspection of Daihatsu 8DK32 Auxiliary Engine

Observation of the Daihatsu 8DK32 Crankshaft Before Repair

i) During visual inspection, it was observed that the bearing of crankpin No. 07 was severely damaged, and bearing material had accumulated in the engine sump.

ii) After opening the connecting rod, the bearing was found to be badly damaged, and crankpin No. 07 was embedded with bearing material.

iii) The bearing material was carefully removed, and crankpin No. 07 was inspected for taper and ovality. 

Hardness Test on Crankpin of Daihatsu 8DK32 Auxiliary Engine	Crankpin Hardness Inspection of Daihatsu 8DK32 Auxiliary Engine

The following minimum and maximum dimensions were recorded.

The ovality of 1.18 mm was well beyond permissible limits, confirming the necessity of immediate corrective action.

Action Taken by RA Power Solutions

Grinding of crankpin No. 07 was initiated using a specially designed onsite crankshaft grinding machine.

• Initially, based on the ovality, an undersize of 1.50 mm was estimated.
• Upon further evaluation during grinding, it was decided to reduce the crankpin diameter by an additional 0.50 mm.
• A total undersize of 2.00 mm was therefore maintained to ensure proper geometry and bearing fit.
• Controlled material removal was performed to restore the crankpin profile and surface finish.
• All safety and operational protocols were strictly followed while carrying out the repair during sailing conditions.

Crankshaft grinding and repair of Daihatsu 8DK32 Auxiliary Engine	In-Situ Crankshaft Grinding of Daihatsu 8DK32 Auxiliary Engine

After grinding, the crankpin geometry was successfully restored, and ovality was controlled within 0.03 mm, ensuring reliable and safe engine operation.

With over 46 years of global experience, RA Power Solutions has successfully repaired and saved more than 10,000 crankshafts from rejection. Our expertise includes crankshaft repairs carried out:

• At ports
• At anchorage
• While vessels are sailing
• Under deviation conditions such as the presence of cracks or undersizing beyond manufacturer limits (after detailed technical evaluation)

Smooth Surface of Crankpin After Repair -Daihatsu 8DK32 Auxiliary Engine

This successful repair of a Daihatsu 8DK32 crankshaft while sailing once again demonstrates RA Power Solutions’ capability to execute critical crankshaft repairs worldwide, minimizing downtime and avoiding costly off-hire periods through precision engineering, advanced tooling, and proven field expertise.

For more information on onsite crankshaft repair, grinding of crankshaft, and crankshaft polishing please email us at rajshahani@rapowersolutions.com, or info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.