MAN 6L 23/30 H Crankshaft Repair | Save Crankshaft from Rejection – RA Power Solutions

We were approached by a company based in Singapore regarding a problem faced by them in MAN 6L 23/30 H engine crankshaft as the lubricating oil pressure was observed to be lower than the limits specified. The crankpin bearings were also found damaged.

The main details of engine MAN 6L 23/30 H are as following:-

Inspection conducted by RA Power Solutions technicians of crankshaft of MAN 6L 23/30 H.

• The six number crank pins were disassembled and the connecting rod was removed.
• All the crankpins were thoroughly cleaned.
• The hardness of all the crank pins was checked by the portable hardness tester and was observed between the range of 223 to 236 on HB scale.
• All the crankpins were also subject to crack detection by MPI process and no crack was observed.
• The crankpins were subject to dimensional inspection and following observations were recorded against the standard diameter of 185 mm.

Crankpin Original Diameter - 185 mm

                                                                                                                               SIZE IN MM                                                                 

• On going through the above readings, it was observed that all the crankpins have ovality in excess ranging from 0.08 to 0.11 mm against the maximum ovality of 0.03 mm.
• The bearing line marks and the rough surface of all the crank pins was observed.

Repair of MAN 6L 23/30 H engine crankshaft undertaken by RA Power Solutions technicians.

• Considering the ovality and bearing line marks on all the six crank pins, it was decided to undertake grinding of all six crank pins.
• The grinding and polishing of all the six crankpins was undertaken to the next under size of 0.5 mm.
• All the crank pins were inspected again and a report was prepared.
• The engine was put on operation and a load trial was taken.

Save your crankshaft of MAN 6L 23/30 H from rejection.

RA Power Solutions has the experience and necessary tooling to undertake the grinding and repair of crankshaft having a small diameter of 185 mm and bearing width of only 64 mm. We have designed our special equipment to work on the crank pins and main journal diameter which have small bearing width.

The companies based in Europe, Singapore and other countries do not have the necessary tooling to undertake the grinding of crankshaft having small diameter and bearing width.Their recommendation is always either to reject the crankshaft or to remove it from the engine block and send it to the workshop for repair.

Save your time avail the benefit of latest technology, process and equipment which RA Power Solutions have out of our  experience of more than four decades in  repair of crankshaft.

The above job of repair of the crankshaft of  MAN 6L 23/30H was executed in the month of September 2017  the crankshaft and the engine are performing satisfactory.

The grinding of all the six crankpins was undertaken while sailing of the vessel from Singapore port to  Kaohsiung port Taiwan.

Damage Crankpin before Repair of MAN 6L 23/30 H     Insitu Crankshaft Grinding of  MAN 6L 23/30 H

 Onsite Crankshaft Grinding of MAN 6L 23/30 H   Picture showing Crankshaft after Machining and Grinding

We have been regularly executing the repairs in Madagascar, Oman, Qatar, Philippines, Bahrain, Srilanka, Bangladesh, Myanmar, Turkey, Nigeria, Greece, Saudi Arabia, UK, Dubai, Malta, Cyprus, Singapore, Malaysia, Colombia, Indonesia, Hong Kong, Spain, Netherlands, Dubai, Portugal, Estonia, Morocco, Belgium, Vietnam, Canada, UAE, Jordan, Libya, Kuwait, Egypt, Morocco, Yemen, Bahrain, Tunisia, Sudan, Oman, Algeria, Iraq.

This blog is written by Mr. Raj Shahani (Managing Director of RA Power Solutions India Pvt. Ltd.).

Mr. Shahani is a highly experienced business leader with rich experience of more than 40 years in the field of Power, Heavy and Shipping industry. He is Technical Adviser to many shipping and heavy industries across the globe.

Mr. Shahani is one of the most enthusiastic professional and he has all the brilliance of an exemplary leader. Mr. Shahani is an extremely effective coach and mentor of teams and is adept at providing leadership in a global, cross-cultural environment.

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

Visit our website: http://turbineshaft.in/