A leading cement manufacturing plant in Nepal contacted RA Power Solutions after the failure of the crankshaft in their Wärtsilä VASA 12V32 LN diesel generator.

The Cement Plant in Nepal has multiple Wartsila diesel generating sets model VASA 12V32 LN, Wartsila 18 V 32, and Wartsila 12 V32. One crankpin in the Wärtsilä VASA 12V32 LN diesel generating set suffered damage after the bearing seized.

Wartsila Diesel Generator Crankshaft  main Observations: 

• The team visually inspected all the crankpins. They found damage on the bearing of crankpin no. 3 and discovered bearing material in the oil sump.
• On removal of connecting Rods from crank pin no 3. In A and B banks, the team found that the bearing had seized tightly on the crankpin diameter. They identified it as a case of bearing failure.
• The team removed the bearing from the crankpin and visually inspected it. They found that bearing material had embedded on the crankpin.
• The team cleaned and lightly polished the crankpin to remove the bearing material. They then performed a crack detection test using the MPI method and did not find any cracks.
• The team checked the hardness and recorded values around 600 HB in scattered areas. This level is considered high. 
• The crankpin was subject to dimensional inspection and the following dimensions were observed.
  • Minimum diameter observed-   269.02 mm
  • Maximum diameter observed-  270.00 mm

The team measured an ovality of 0.98 mm against the standard diameter of 270 mm. They considered this value to be very high.

Achievement by RA Power Solutions in successful Repair of Wartsila Crankshaft 12V32 LN:

A team of three RA Power Solutions technicians successfully repaired the damaged crankpin no. 3 of the Wärtsilä 12V32 crankshaft in just 79 hours. They worked nonstop, 24 hours a day, to complete the grinding process.

The Solution: On-Site Grinding and Repair

RA Power technicians have undertaken the grinding of crankpin having a standard diameter of  270 mm.  Due to serious damage of crankpin, it is to be undersized by 2.0 mm.

We have been regularly undertaking crankshaft repair of Wartsila Diesel engine Model No. 12V32, Wartsila 46, Wartsila 43, Wartsila 12V26, Wartsila 12V20 and can undertake grinding of crankshafts up to 700 mm diameter. 

For more details of the Wartsila 12V32 LN crankshaft repair, crank pin grinding machine, wartsila crankshaft repair, and wartsila diesel generator crankshaft, email us on info@rapowersolutions.com, rajshahani@rapowersolutions.com, call at +91 9582647131,+91 9810012383.

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