RA Power Solutions was informed about a serious accident on a vessel damaging SMIT MAN R666W (Main Engine). Cylinder liner and Engine block housing developed multiple cracks. Two technicians having experience of more then 40 years in crack repair by metal stitching and metal locking were deputed on board a vessel.
Crack in exhaust side stud bolt hole | Crack in cylinder liner |
The following are the main observations after the inspection of the cylinder liners and engine block:
- The damaged cylinder liners and cylinder block were subjected to a crack detection test by MPI. RA Power Solutions uses a high-intensity Magna Flux torch to detect the cracks.Our technicians are also level three qualified to undertake the MPI test The details of the crack observed in the cylinder liners and cylinder block of the MAN main engine are as follows:
- Cylinder Liners: A crack having a length of approximately 150mm was observed.
- In the case of the engine block, two numbers of cracks were observed.
The hardness of cylinder liner was observed between 220-250 HB.
Crack in cylinder liner |
Repair undertaken by RA Power Solutions
In the case of cylinder liners, the crack was repaired from the inside and from the outer diameter as well by a metal lock process. We used special alloy locks and keys to repair the crack.
The two cracks in the engine block liner sitting area were repaired by a metal lock. After repairs, the proper grinding and polishing was done on the crack area to maintain the specified tolerance.
Crack in main engine liner |
The liners were assembled in the presence of our technicians and the engine was put on operation after leak test. The performance of the engine after crack repair of cylinder liners and engine block is observed satisfactory.
Crack repair by metal lock process |
Crack repair of housing under process |
We have executed successfully hundreds of jobs of damaged and cracked cylinder liners, pistons, engine blocks, and major components used in heavy equipments.
Crack repair of cylinder liners |
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For more information regarding cylinder liners, engine blocks, and crack repair of MAN main engine, please contact us at rajshahani@rapowersolutions.com or info@rapowersolutions.com or call us at +91 9582647131 or +91 9810012383.