RA Power Solutions was approached by a leading shipping company based in Indonesia after damage was reported to the crankshaft of their main engine. At the time of reporting, the vessel was anchored at Batam Port, Indonesia, and an urgent on-site repair solution was required to minimize downtime.

Damaged Crankpin of RUSTON 12RKCZ Main Engine	Damaged Crankpin Having Line Marks of RUSTON 12RKCZ

RUSTON 12RKCZ Crankpin #03 having line marks	RUSTON 12RKCZ Damaged Crankpin Line Marks

Action Taken by RA Power Solutions to Repair RUSTON 12RKCZ Crankshaft

(a) Our experienced technicians mobilized with portable onsite crankshaft grinding and polishing equipment, along with calibrated measuring instruments and consumables. The team boarded the vessel and conducted a detailed inspection of the damaged crankshaft of the Ruston 12RKCZ engine.

The details of the engine and crankshaft are pasted below:

Inspection of Crankshaft of RUSTON 12RKCZ	Hardness Test of Damaged Crankpin of Engine RUSTON 12RKCZ

(b) On inspection, the crankpins no. #1, #2, #3 and #6 were found to be damaged, and the remaining two crankpins, #4 and #5, had minor bearing line marks

(c) All major parameters, like crack detection by MPI, hardness test, and other inspection procedures, were followed.

(d) In the MPI test, surface cracks were observed on a seriously damaged crankpin. Even the hardness observed was on the higher side.

(e) The grinding of four crankpins was executed, and two crankpins were polished. The final dimensions of crankshaft machining were maintained as follows:

MPI Test of RUSTON 12RKCZ Engine Crankshaft	Magnetic Particle Inspection Test of RUSTON 12RKCZ Engine for Crack Detection

(f) After completing the machining process, the client arranged for undersized crankpin bearings from a UK-based manufacturer, which were subsequently installed.

Onsite MPI Inspection Ongoing	MPI of Crankpin of RUSTON 12RKCZ

The following undersized bearings were used:

Onsite crankpin of RUSTON 12RKCZ Repaired

Worldwide Onsite Machining Services by RA Power Solutions

RA Power Solutions is a global leader in onsite crankshaft repair, grinding, and polishing services, with over 45 years of experience. We execute onsite machining jobs for marine, power plant, and industrial engines worldwide, including locations across Asia, the Middle East, Europe, Africa, and the Americas. Our ability to mobilize skilled technicians with advanced portable equipment enables us to perform critical engine repairs anywhere in the world, minimizing downtime and eliminating the need for crankshaft removal.

With decades of hands-on experience and a presence across power plants, marine engines, oil & gas, and heavy industries, the company is widely trusted for onsite crankshaft grinding services that eliminate costly dismantling and downtime. Using state-of-the-art portable grinding machines, laser-based alignment systems, and highly skilled engineers, R A Power Solution ensures micron-level accuracy, superior surface finish, and extended engine life—right at the customer’s site.

For any information, please email us at rajshahani@rapowersolutions.com, info@rapowersolutions.com, or call us at +91 9582647131 or +91 9810012383.

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